https://www.paypal.com/paypalme/TallPaulTech Old videos that go further in depth with some of these things: https://www.youtube.com/watch?v=C7nhdAL9oPg https://www.youtube.com/watch?v=QXPZT6TWLbE https://www.youtube.com/watch?v=K5yOBr3uoGs https://www.youtube.com/watch?v=8MVWrCgaH68 https://www.youtube.com/watch?v=FMxou9zpVI8

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech I've been busy working on this spectrum analyser, and made a bit of progress. It still has a long way to go, but I haven't forgotten about it.

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech Progress of a 2d/3d spectrum analyser for RTL-SDR, HackRF and microphone. Currently back on track after being shelved for a couple of years. I just wanted a spectrum analyser tool that lets you measure things like a real spectrum analyser does. I'm putting a lot of time into this, and I want to get it right before releasing it.

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech Setting up a capture filter for tcpdump or Wireshark to only capture a particular OUI or multicast addresses.

https://www.topdognetworks.com.au/ Top Dog Networks is Brisbane's premier provider of cutting-edge network services tailored for your enterprise. We specialise in sectors such as hospitals, education, hospitality, warehousing, retail, and office environments. With experience in all components of modern networking, we are here to help you with your high-performance network infrastructure and support your organisation’s evolving technological needs.

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech Customising Wireshark for analysing Wi-Fi frames with some colour and shortcuts.

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech Using outbound NAT on a VLAN interface in OPNsense to access cameras behind an NVR directly.

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech Upgrading to an old 100Mb/s switch for a home network and doing a bit of a tidy up in the rack. It's still not quite finished, but it's better than it was. We put the cameras on their own VLAN on the switch, and doing NAT from the router to them, so they can return traffic rather than trying to go out of their normal NVR default gateway for unknown networks.

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech pactl load-module module-null-sink sink_name=customnullsink sink_properties=device.description='Custom' pactl load-module module-loopback source=alsa_input.usb-RODE_Microphones_RODE_NT-USB-00.analog-stereo sink=customnullsink pactl load-module module-loopback source=alsa_output.pci-0000_00_1f.3.analog-stereo.monitor sink=customnullsink parecord --device=customnullsink.monitor --channels=2 --file-format=flac pulse_record_`date +"%Y%m%d_%H%M%S"`.flac # List sinks pactl list sinks # List sources pactl list sources

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech

Donations welcome: https://www.paypal.com/paypalme/TallPaulTech Simple setting on your home router to block all adult sites.

Doing a simple VXLAN setup between an Aruba CX 6300 switch, and a simple Linux host. VXLANs let you extend the L2 broadcast domain over a UDP tunnel.

The Nikon Z30 camera can't be used directly as a webcam like a UVC device can. Instead, it requires a program in the middle to make it appear as a webcam to the system. The problem is, this is only provided for Windows or Mac, but not Linux. There is a program for Linux that connects to the camera via MTP and creates a websocket to view video in a browser. This source can be used via OBS and sent to the dummy video loopback device so it can be seen as a video source to the system. I got it working, but the results weren't as good as I'd hoped, so I went back to an HDMI to USB capture device. https://github.com/puhitaku/mtplvcap https://downloadcenter.nikonimglib.com/en/products/548/Webcam_Utility.html https://en.wikipedia.org/wiki/UVC https://en.wikipedia.org/wiki/Media_Transfer_Protocol

We love MIDI around these parts

There's nothing like fixing your own products. It used to be that way, and it was quite normal. Nowadays, it's hard to believe that we have to fight against big corporations to be able to do this same kind of thing.

Using Coral AI through Proxmox to Frigate on docker, to process detection locally.

If anyone knows what type of snake this is, please let me know. This is in South East Queensland.

I bought an iPad because I had to for a specific purpose.

The best butcher in Brisbane. Get on down there! https://www.facebook.com/p/Crossetts-Family-Butchery-100094113287756/ https://www.instagram.com/crossettsfamilybutchery/

Making some custom network maps in LibreNMS and putting hosts in the correct geographical location.

Hunting down a cabling issue that was preventing LAN connection coming up at 1Gb/s. Tester link: https://www.aliexpress.com/item/1005006374892068.html

Adding a switch to a workshop network and doing the change over from the TP-Link router to the Ubiquiti router and setting up some cameras.

Taking a high level audio output from a factory amp which has separate woofer/tweeter and combining them to a single low level signal to feed into an amp or other head unit.

My bridge adaptor was working find until I installed Docker, at which point it stopped forwarding traffic through itself.

Doing a Wi-Fi packet capture while setting up a Ubiquiti Wi-Fi camera to the Dream Machine

I have never touched Ubiquiti gear until I got hold of this box of random goodies. There will be other more in depth videos once I get my head around it all and dig deeper.

The meetup will be in the usual place, at the Grey Gum picnic area, between channel 7 and 9. I'll be there from 10ish. Maybe bring a chair, even though there are quite a few bench seats there.

If you're looking for a free virtual machine hypervisor that you can run through a standard web interface, then Proxmox might just be for you.

Setting up virt-manager to run kvm on Linux boxes so you can install virtual machines. No need for expensive software.

Building the box for the 2 subwoofers to fit in the boot, and some finishing off and tidy up. Equipment: Alpine UTX-M08S https://www.alpine.com.au/shop/audio-visual-2/utx-m08s/ Audison AF M8.14 bit https://audison.com/product/af-m8-14-bit/ Audison AF M1D https://audison.com/product/af-m1d/ Hertz MP 250 D4.3 Pro https://hertz-audio.com/product/car-audio-subwoofers-mille-pro-mp250_d4_3/ DB Drive NEO CAP10 https://dbdrive.net/product/neo-cap10/

Grey Gum picnic area Mt Coot-tha between channel 7 and 9 10am Saturday 24th of February

I thought that charging a Tesla with its 10 amp power cable would be a simple task for a BYD that can deliver 10 amps out of a standard power point. It seems I thought wrong.

Guess the song by title and artist and put it in the comments. I'll put correct answers in a pinned comment.

Connecting the Audison AF M8.14 bit amplifier to the Alpine head unit, bypassing the factory sound completely. https://audison.com/product/af-m8-14-bit/ https://www.alpine.com.au/shop/audio-visual-2/utx-m08s/

Installing an Alpine UTX-M08S Hi-Res sound controller into the dash of a BYD Seal.

Installing four dashcams on the BYD Seal for full 360 degree coverage.

Charging a huge capacitor for my car stereo, to avoid a sudden surge of current from the battery.

Mapping out the cables and connector of the factory speakers in the BYD Seal. I need to do this as part of my stereo upgrade that I'll be doing.

Installing Android APK apps on the BYD Seal. The password is GHY0613byd

When the BYD Seal is charging, there is a rather loud buzzing noise coming from it. At night time it especially rings throughout the house. I just had to hunt it down to see what it was.

Getting rid of the annoying and frankly dangerous automatic systems in the BYD Seal that take over aspects of the driving. Also getting rid of some annoying sounds to make driving more pleasurable.

Looking at the network activity of a BYD Seal. It seemed to be typical of an Android system, but there will be more stuff to look at if I dive deeper.

Hooking up a second Tesla charger in the garage for the new BYD Seal when I get it.

Using a Raspberry Pi over a network to look at CAN bus messages on a Tesla Model S.

Highlights of how the channel has changed over the years as it gained 50,000 subscribers.

Setting up a CAN bus adaptor in Linux. This is the adaptor I'm using: https://www.aliexpress.com/item/1005006032351087.html This is the software I showed: https://www.savvycan.com/

Tesla Model S P100D for sale https://www.carsales.com.au/cars/details/tesla-model-s-2017/sse-ad-6587532/? QLD EV rebate scheme https://www.qrida.qld.gov.au/program/queensland-zero-emission-vehicle-rebate-scheme

You have to know your audience before you use certain words!

'Yes' this is how to avoid major outages.

Looking at the network activity of the Tesla Powerwall. Also a bit of an insight as to how the fault finding and resolution process of that company operates. curl -k -O -c cookies.txt -X POST https://powerwall/api/login/Basic -H "Content-Type: application/json" -d "{\"username\": \"customer\",\"email\": \"[email protected]\",\"password\": \"PASSWORD\"}" curl -k -O -b cookies.txt https://powerwall/api/meters/aggregates

Looking at the network activity of a Tesla Model S. There were some interesting discoveries, especially when I got to the Wi-Fi part.

I just can't handle dealing with Tesla. I wish there were alternatives to get things done.

New standard enables WPA3 encryption on public Wi-Fi networks.

In this video, I show you how you can modify the payload of an ICMP PING packet to send your own data back and forth through an ICMP tunnel. If a firewall allows pings, then there's a good chance you can set up a tunnel. Wireguard video - https://www.youtube.com/watch?v=QXPZT6TWLbE

In this video, I show you how you can use a USB device over a network, just as though it was plugged into your host locally.

** WARNING ** There will be some rather obscure sounds in this video, so be warned if you're wearing headphones! While FM is the standard modulation used for analogue voice communications, aircraft still use AM. Given that AM is more prone to interference, why is this the case? In this video I'll show you why.

The difference between Antennas and Antennae.

Taking a look at network connectivity options in a typical new apartment building, using both wired and Wi-Fi.

A lot of Wi-Fi systems are slow because there is a lack of understanding about the bit rate overhead. In this video I give a demonstration of some of the most common causes.

Showing the approach I took to help a friend out with a simple network ping issue.

Running some more Cat5E from the network switch in the garage to one of the bedrooms so I have handy RJ45 network outlets ready to go.

Making my own dodgy (but pretty good) dipole antenna out of a bit of coax.

New Rode Go II wireless microphones and a look at the RF that they use. https://fccid.io/2AEAN-WGOIIRX/Internal-Photos/Internal-Photos-4975039 http://www.smartcores.cn/ats2833-bluetooth-module/ https://infocenter.nordicsemi.com/pdf/nRF52810_PS_v1.0.pdf https://rode.com/en/microphones/wireless/wirelessgoii

Using SDR on a phone or laptop to listen to FM communications that a lot of shops have these days. Site map link is here: https://web.acma.gov.au/rrl/site_proximity.main_page Unit type (maybe) link is here: https://www.motorolasolutions.com/en_xa/products/two-way-radios-business/entry-level-series/clp107e.html#tabproductinfo

The computer I got from AliExpress seems to be stable after I swapped memory with another computer. I hope it stays that way. In this video I show some of the different in power usage when running an iperf3 test as opposed to it just sitting there at idle.

I bought a little computer with 2 network interfaces to use as my new router, but it didn't go so well.

In this video I show you how you can do NAT in a couple of different ways with IPv6. I also show you how you can get similar 'easy to remember' IPv6 addresses, just like you had in IPv4.

I gave IPv6 a serious try. I disabled IPv4 altogether and used only IPv6 mainly to learn it. After running it for a while I discovered some of the shortcomings that are holding it back from widespread public adoption.

Moving NBN from fibre to the node (FTTN) which is copper over the phone line that needs a modem, to fibre to the premise (FTTP) which brings the fibre directly into the house. I did most of the preparation for them so that they wouldn't have any problems putting the unit where I wanted it.

Using the /etc/ethers file to resolve names to your mac addresses makes it easy to spot things when analysing a packet capture.

Doing a backup of a brand new computer that came with Windows pre-installed, so if I ever want to go back to factory fresh, I can just restore it from my backup. I'm booting up Debian live and using dd to copy over an NFS network share.

Showing the view and the antennas up at the top of Mt Cotton. You can see the whole of the south side of Brisbane from up there, and out over the bay islands.

Just a demo of what goes on behind the curtains of a seemingly simple connection to a web site. Connections are made to Google when safe browsing is selected.

IRC details to connect to: server- irc.libera.chat channel- #TallPaulTech

Setting up some custom colours for Wireshark and tshark, along with profiles to match whatever protocol you're dealing with.

Link to source: https://github.com/lwfinger/rtl8852au Volans VL-UX1800 AX1800 Wi-Fi 6 USB Adapter https://www.msy.com.au/product/volans-vl-ux1800-ax1800-wi-fi-6-usb-adapter-69448

Using unbound to create my own NAT64 on my router, in conjunction with Tayga so that I can access private IPv4 addresses.

If you use an IPv6 only network, you will not be able to access servers that are IPv4 only. By using Tayga in a Raspberry Pi router, you can translate the IPv4 address of the server into an IPv6 address that your host can use. This video shows the setup and some packet captures of how it works.

Running an antenna directly to the HackRF and bypassing the splitters, so it gets a clean signal in, and so I can transmit out.

Using a SOAPY server to serve my SDR devices over the network, including rtlsdr and hackrf. I also show a bit of a protocol analysis in Wireshark... of course.

Brief overview of multicast DNS with a couple of examples and, of course, a packet capture.

I got my new adjustable desk, and comfortable chair. Tidying up the cables took longer than putting the thing together. https://dannysdesks.com.au/product/drive-corner-electric-height-adjustable-desk/ https://dannysdesks.com.au/product/posturemate-office-chair/?state=QLD&attribute_pa_choose-a-colour=black

FTP is not secure. It's still commonly used though, so in this video I show you how to extract files from an FTP packet capture. Keep in mind also that if this is on a Wi-Fi PSK network and you know the passphrase and capture their 4-way handshake, you can decrypt the Wi-Fi and then grab the file transfer data just like I show in this video.

While trying to disable IPv4 I went down the rabbit hole of raw sockets with DHCP and firewalls, so thought I'd share it with you. Handy links: https://man7.org/linux/man-pages/man2/socket.2.html https://github.com/torvalds/linux/blob/master/include/linux/socket.h https://github.com/NetworkConfiguration/dhcpcd/blob/master/src/dhcp.c https://man7.org/linux/man-pages/man7/capabilities.7.html https://www.man7.org/linux/man-pages/man8/setcap.8.html

Showing the basics of VRRP in both IPv4 and IPv6, and setting it up on a Raspberry Pi.

Looking at the network traffic of a HikVision camera with Wireshark. https://www.hikvision.com/en/products/IP-Products/Network-Cameras/Pro-Series-EasyIP-/ds-2cd2387g2p-lsu-sl/

I got this ultrawide monitor mainly to get rid of the bulk of monitors on the desk, but also to get the most out of extremely wide SDR bandwidth spectrum displays, and also lots of mixing controls for my music software. It's a Philips.... something, running at 5120x1440, 75Hz.

Setting up MPSK on an Aruba AP to authenticate with FreeRADIUS running on a Raspberry Pi. MPSK lets you use a single SSID Wi-Fi network with a client pre-shared key, but with the ability to assign variables like VLAN and passphrase per user.

This shows you how to set up smstools so you can use a ttyUSB controlled modem to send and receive SMSes on a Raspberry Pi. Also, I show how to set it up to access the mobile Internet so you can use that as a backup. Links: https://whirlpool.net.au/wiki/sierra_advanced Send command directly to serial port: echo -n -e 'at!scact=1,1\r\n' (redirect output to) /dev/ttyUSB3 (YouTube doesn't allow the greater than sign for redirect) AT Commands: ################## ## General info ## ################## # Get information ati # Get manufacturer at+cgmi # Get IMEI at+cgsn # Get IMSI at+cimi # Get signal quality (RSSI,BER) RSSI=13 means 113-13*2 = -87dBm at+csq # Check if SIM is present at+cpin? # Check SIM registration at+cgreg? +CGREG: 0,1 (registered) +CGREG: 0,0 (not registered) # Show status at!gstatus? # Show custom options at!custom? # Password to set custom options at!entercnd="A710" # Set region to Australia at!custom="PRLREGION",03 # 01 Europe (and the rest of the world) # 02 North America # 03 Australia # 04 Japan ######### ## SMS ## ######### # Set storage, and sms mode AT+CPMS="ME"+at+cmgf=1 # Read all SMSes AT+CMGL="ALL" # Read individual SMS at+cmgr=0 # Send SMS at+cmgs="+61phonenumber" type message here and press CTRL+Z when finished # Delete SMS number 'x' AT+CMGD=x ################## ## DATA NETWORK ## ################## # Set up a profile at+cgdcont=1,"IP","mdata.net.au" # Verify profile is created at+cgdcont? +CGDCONT: 1,"IP","mdata.net.au","0.0.0.0",0,0 +CGDCONT: 3,"IP","telstra.internet","0.0.0.0",0,0 +CGDCONT: 15,"IP","telstra.bigpond","0.0.0.0",0, # Connect with profile 1 at!scact=1,1 # Get IP address at!scpaddr=1

Setting up an NTP server on a Raspberry Pi to serve the LAN clients without them having to contact the Internet.

Setting up Wireguard VPN between a couple of Raspberry Pi's. Included is the config for both IPv4 and IPv6. # test wg-quick up wg0 wg-quick down wg0 # auto start systemctl start wg-quick@wg0 systemctl enable wg-quick@wg0

I finally got to the bottom of this thing... and of course it was something simple :)

FIXED!.. and I told you I was a dumb cunt! New video coming soon. dhclient - part of isc-dhcp-client - runs on things that you put in /etc/network/interfaces - config is /etc/dhcp/dhclient.conf - ISP doesn't respond to discover dhcpcd - runs on pi for things not in /etc/network/interfaces - can run in addition and populate stale values in adapter - doesn't get required ipv6 as standard - not needed because of settings in /etc/network/interfaces - config is /etc/dhcpcd.conf - needs to be disabled # disable dhcpcd sudo systemctl stop dhcpcd.service sudo systemctl disable dhcpcd.service # modify /etc/dhcp/dhclient.conf end dhcp-client-identifier 1:dc:a6:32:c1:8f:ad # adjust timeout /etc/systemd/system/network-online.target.wants/networking.service

Saturday the 25th of March. I'll be there about 10:00 to 10:30 ish. Bring your own drinks and maybe a chair.

git clone https://github.com/tinyproxy/tinyproxy.git sudo apt-get install autoconf ./autogen.sh make sudo make install

I just wish people wouldn't get so dramatic about issues that have simple fixes.

Compiling and installing a simple TFTP server. [LISTEN-ON] [HOME] /home/user/tftp [TFTP-OPTIONS] username=user ThreadPoolSize=10 Read=Y Write=Y Overwrite=Y

This video shows how to set colours on the BASH CLI of Linux. Also, I show how to upgrade vi to vim to enable colours there too. Here's a brief list of colours for the CLI in the .bashrc script 01;31m red 01;32m green 01;33m yellow 01;34m blue 01;35m purple 01;36m cyan 01;37m white Here's a link to a much bigger list https://talyian.github.io/ansicolors/

sudo bash apt-get update apt-get install cmake -y apt-get install libusb-1.0-0.dev -y git clone git://git.osmocom.org/rtl-sdr.git cd rtl-sdr/ mkdir build cd build/ cmake ../ -DDETACH_KERNEL_DRIVER=ON -DINSTALL_UDEV_RULES=ON make make install ldconfig Run it with rtl_tcp -a {IP Address}

It wouldn't be a server without monitoring enabled. In this video I do a simple SNMP setup so I can monitor it with LibreNMS

The server was having some glitches very briefly, and the logs showed it was going to sleep. This is what I did to hopefully prevent that from happening again. sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target

While I was editing this video, I thought that I don't remember setting up root keys on all the clients that I run virt-manager on, so don't quote me on that as being required. I can't remember, but either way, you know how to do it if you want now.

The next step in my server setup is to enable file sharing across the network. NFS is for my Linux clients, and SMB (Samba) for the Windows one.

The initial part of my server upgrade. Installing the operating system, and getting the network config working. Also, making sure the security cameras are streaming and recording.

I'm going to do an upgrade of my server soon, so I thought I'd share some things that you should do when carrying out any sort of upgrade or outage, no matter how big or small.

Making my own ketosis pizza base from raw ingredients, and then putting the magic on top to make the best keto pizza you've ever heard of.

If you're doing a packet capture via Wireshark and it crashes, you may still be able to save the data you've already captured.

Saturday, 25 March, about 10:00 ~ 10:30 ish, Grey Gum rest area. We'll have a bbq, and a bit of a yarn. If you have any cool technology to show, be sure to bring it up with you. If you're coming from the direction where you pass the lookout, go past the first tv station and then you'll see the Grey Gum rest area in on the right. Hope to see you there :)

I figured out why Aussie Broadband kept doing NAK for my DHCP request, where my previous ISP never had a problem.

Using SDR to capture and analyse signals from the take-away so I can reproduce them myself and make the order ready beepers beep. Here is the link to the wireless doorbell which shows how I built most of the gnuradio flowchart. https://www.youtube.com/watch?v=AQnKOf3bTSE

Pulling yet another beeper out of an appliance because they give me the shits.

Using the HackRF to scan the 6GHz Wi-Fi spectrum

Installation of a satellite antenna that I can use with my SDR setup. The antenna is just the one that's for sale from rtl-sdr.com

I wanted to use my Aruba S2500 switch, but the original fans are very loud, so I got some Noctua fans and put them in to make it much quieter.

Some subjects relating to SDR, FFT, Nyquist theory, Aliasing, and things of that nature.

Running a cable from one of the discone antennas down to the sdr server.

I'm going to set up lots of SDR stuff on this server, so I'm going to need lots of antenna runs to come down to here. While I wait for my cables to arrive, I'm just going to throw a USB card in it so I'll have somewhere to plug them in.

Setting up an LACP link from Linux box to switch.

In this video I install updated firmware for the Proscend DSL modem, so that it will work with the NBN's updates that include SOS and ROC. It worked, and I did packet captures (frame captures to be technical, as there's no IP involved) so I could be confident the data went to the device. Big thanks to Duxtel who surprisingly provided the necessary firmware and programs to do the update. I appreciate it when companies don't treat customers like idiots. It's a rare thing :)

Just moving some equipment around, nothing special. A change is as good as a holiday.

A lot of people seem to think that NAT is a form of firewall. It's not. You can have NAT running and still have packets going through your router. The firewall is done by the filtering, which I show in this video.

Diving right into IPv6 to learn it. Don't forget to do packet captures, because they never lie!

The 'making of' video for my recent song, "What do you do for me?" All computer work is done using Linux.

A song put together in Linux just for a bit of fun. Written and performed by me.

Using a Raspberry Pi lets me do packet captures on all ports easily, including the WAN port.

I decided to set up IPv6 for the first time ever, and do it manually in order to learn as much as I can. There are no doubt lots wrong here, so I'm open to hear ideas. One thing I'm curious about, is why when I ping someone from a LAN host, the ping leaves my network with my router's WAN IP address instead of the internal host address, which I thought it would in IPv6.

If you know of an Australian ISP that has a static IP address, IPv6, unlimited upload/download, and doesn't require PPPoE, please let me know. This is the ISP's statement on the issue: https://www.letsbemates.com.au/mate/new-nbn-network/?utm_source=mate%20new%20network&utm_medium=email&utm_campaign=mate%20new%20network&utm_content=nbn

If you have more than one rtl-sdr dongle connected, you need a way to determine which one you're dealing with. This procedure lets you set a unique serial number for each device.

You've asked for it, so here it is. The simple way to get perfect pork crackling.

The importance of a good power supply for radio systems, and any other type of system too.

I'm sure someone out there can help ol' Paul out a bit here. Email me at [email protected] if you can give me some tips.

This is how not to make your own ergonomic keyboard.... sort of.

I've disabled comments, because even my own replies are automatically blocked half the time. Funny comments just aren't allowed it seems. But, I have Odysee up and running, so if you want to comment there, and if it lets us all say what we actually want to say it should be much better. Hopefully it won't dictate how we speak like this site does. Just watch this video and comment over there and I will too. https://odysee.com/@TallPaulTech:b/retropie-furniture:3

Using GNU Radio to demonstrate the basics of amplitude modulation (AM)

I got 15m of 50 Ohm RG48 cable so I could have a direct run from one of the discone antennas on the roof down to my desk where my HackRF or other equipment is.

Setting up a music room with microphones, mixers, and Linux boxes. The electric drums have been gathering dust for a few years, so I decided to fix them up and get them going again. The cordless mic I was using when I filmed this had a buzz on it that I only noticed after filming. I tried to do noise reduction on it, but you can still hear it coming through. I'm aware of it and will have it sorted before the next video, but wasn't about to redo this one. You'll be 'right.

Changing the factory 12 volt lead acid battery in a Tesla P100D to a lithium replacement. www.ohmuu.com

Using Firefox to get the source address of the RT video stream so you can watch it in your own media player.

There are many more reasons why I use Firefox, but here are the main two. Windows users should pay attention to this video.

Running cables for my roller shutters in the wall to keep them out of sight. Also looking at the RF pulses that the remote control transmits.

How to set up the DisplayLink USB video adapter on Debian Linux. Driver install: https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu Show current graphical system: echo $XDG_SESSION_TYPE Install headers for compilation: apt-get install linux-headers-5.10.0-9-amd64 More info on Wayland and X11: https://itsfoss.com/switch-xorg-wayland/

Highlights from today's meetup at Mt Coot-Tha.The sound is a bit rough because of the other people and creatures up there, but it's just to give an idea of how the day went. I might start up an IRC channel, and will let you know when that happens.

The meetup is going ahead! Saturday 22nd Jan, about 10:30. Bring your own drinks. I will bring some sausages for the BBQ, but have no idea how many people will show up so you may get lucky, or may not. Bring a plate if you want. See you there.

Demonstration of how polarisation affects the reception of different signals. In this demo, I compare horizontally polarised TV signals to vertically polarised radio signals. Information on the transmitters at Mt Coot-Tha is here: https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=3628739 https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=1602038 https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=3629003 https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=1726860 https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=1726863 https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=1726864 https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=5017910 https://web.acma.gov.au/rrl/assignment_search.lookup?pEFL_ID=3628588

The meetup is finally happening! Saturday 22nd of Jan, 10:30ish I'll be bringing some random electronics and stuff to trade with people who may want to do the same. I'll also of course be bringing some sausages to cook up, but I have absolutely no idea how many people may turn up so there might be some luck involved there. Feel free to bring some bits of your own, including drinks. If the carparks are full, just park parallel to the road in there as it seemed wide enough to fit more cars in there. So charge up your laptops and head on up for a bit of a social gathering. Hope to see you there!

I missed a clip in the editing to point out that at the 29 minute mark I'm back in my house to show some automation. This is just a bit of a tour through a house that contains some typical 'smart' devices, and also seeing what they actually do on the network. https://www.home-assistant.io/blog/2021/12/23/the-open-home/

Firefox version 91 causes the www.bom.gov.au site to break. The core problem is with the web server config, but we can get around the issue with Firefox and still use the site. Packet captures and log inspection as always are the way to figure it out.

In this video I measure the energy usage to cook the veggies for my roast, which I'll be using from now on instead of gas since my electricity is free from solar/battery.

Destroying the LEDs in a Raspberry Pi and POE splitter, to avoid having to see them flashing all night in my pitch black bedroom. Also a bit of a rant about how shit YouTube is with its censorship.

This video shows how to use gnuradio to generate the pulses of a wireless doorbell, and then transmit that signal using a HackRF. Programs used are gnuradio, gqrx, and inspectrum.

Command to make video from images ffmpeg -r 25 -f image2 -i *.jpg -vcodec libx264 -crf 20 -pix_fmt yuvj422p test.mp4

This video is to get some other views on what Australia should be doing for our electricity supply. This country is the envy of most for renewables, so that is the way I think we should go. If more individuals can generate their own power at home without the grid, that's even better and getting more achievable every day. Let me know what you think from either nuclear, renewable, or coal.

Some handy Wireshark tips to help make packet analysis that bit easier

An introduction of the differences between analogue and digital radio, and why digital radio is a better system for the future. Web page write up is available here: https://tallpaultech.com/?p=397 Links to programs used in video: spektrum https://github.com/pavels/spektrum qt-dab https://github.com/JvanKatwijk/qt-dab/releases welle.io https://www.welle.io/ gqrx https://gqrx.dk/download mediainfo https://mediaarea.net/en/MediaInfo/Download

Using filters in tcpdump or Wireshark to manage your Wi-Fi captures.

Do hackers really look like the way they're portrayed in the media?

Modifying packet captures and resending them onto the network. # Strip vlan tag editcap -L -C 12:4 original.pcapng modified.pcapng -T ether # Strip GRE from AP tunnel tshark -r $1 -Y ip.dst==$2 -w fromcontroller.pcapng tshark -r $1 -Y ip.src==$2 -w tocontroller.pcapng editcap -L -C 0:42 fromcontroller.pcapng fromcontroller-new.pcapng -T ieee-802-11 editcap -L -C 0:38 tocontroller.pcapng tocontroller-new.pcapng -T ieee-802-11 mergecap fromcontroller-new.pcapng tocontroller-new.pcapng -w redone.pcapng

Upgrading the Wi-Fi in a workshop by running some cables and installing some new access points. If you're into cars, check out the Nugget Garage channel https://www.youtube.com/c/NuggetGarage

Installing Mobian onto a Pinephone. It's the closest thing to having Debian Linux on a phone. No emails/sign-ups necessary.

# Sample vlm config file del all new ch1 broadcast enabled setup ch1 input "rtp://239.1.5.1:20000" setup ch1 output #mosaic-bridge{id=ch1,width=960,height=540} new ch2 broadcast enabled setup ch2 input "rtp://239.1.5.2:20000" setup ch2 output #duplicate{dst=mosaic-bridge{id=ch2,width=960,height=540},select=video,dst=brid ge-out{id=0},select=audio} new ch3 broadcast enabled setup ch3 input "rtp://239.1.5.3:20000" setup ch3 output #mosaic-bridge{id=ch3,width=960,height=540} new ch4 broadcast enabled setup ch4 input "rtp://239.1.5.6:20000" setup ch4 output #mosaic-bridge{id=ch4,width=960,height=540} new bg broadcast enabled setup bg input "bg.jpg" setup bg option image-duration=-1 setup bg option image-fps=25/1 setup bg output #transcode{vcodec=mp4v,vb=0,fps=25,acodec=none,channels=2,sfilter=mosaic{alpha=2 55,width=1920,height=1080,cols=2,rows=2,position=1,order="ch1,ch2,ch3,ch4",keep-aspect-ratio=ena bled,mosaic-align=0,keep-picture=1}}:bridge-in{offset=100}:rtp{dst=239.1.2.3,port=20000,mux=ts,s ap,name=Mosaic,ttl=10} control bg play control ch1 play control ch2 play control ch3 play control ch4 play

Setting up acarsdec to receive and decode ACARS messages from aircraft using a Raspberry Pi and RTL-SDR dongle. ## Install rtl_tcp sudo bash apt-get update apt-get install cmake -y apt-get install git -y apt-get install libusb-1.0-0.dev -y git clone git://git.osmocom.org/rtl-sdr.git cd rtl-sdr/ mkdir build cd build/ cmake ../ -DDETACH_KERNEL_DRIVER=ON -DINSTALL_UDEV_RULES=ON make make install ldconfig ## Install libacars wget https://github.com/szpajder/libacars/archive/refs/heads/master.zip unzip master.zip cd libacars-master/ mkdir build cd build cmake .. make make install cd ../.. rm master.zip ## Install acarsdec wget https://github.com/TLeconte/acarsdec/archive/refs/heads/master.zip unzip master.zip cd acarsdec-master/ mkdir build cd build/ cmake .. -Drtl=ON make make install cd ../.. rm master.zip ldconfig ## Run it acarsdec -r 0 131.55

Setting up a home office on water by attaching a laptop to a kayak

There are lots of simple devices broadcasting messages in the air at 433MHz. Things like weather stations, doorbells, remotes, and even car tyre pressure readers. In this video I go through how to set up the program rtl_433 on a Raspberry Pi to decode these messages. SDR setup video https://www.youtube.com/watch?v=EHSxe44svns

Installing a new wideband discone antenna to go with my existing one up on the roof. This will give me more flexibility with my SDR setup.

How to connect Reason to Reaper using the ReWire interface.

Nothing too technical, just a bit of cable management.

Another quick and easy meal.

Starting from scratch, setting up a Raspberry Pi to be used as a router and firewall using nftables. Here is a pretty good diagram showing the packet flow and the hooks that I was trying to explain: https://people.netfilter.org/pablo/nf-hooks.png This link also gives a good explanation of it all: https://wiki.gentoo.org/wiki/Nftables

Another quick and easy meal full of protein, this time with some kangaroo. Do other countrymen eat their national emblem?

Replacing a whole bunch of VM servers with a whole bunch of Raspberry Pi servers

Another quick and easy ketosis meal.

The best electricity source is the one that you control.

This video shows how to use vlc to get video from a camera, and re-stream it as multicast. Also, using ffmpeg we can save the video to file in timed segments. vlc command: su - pi -c "/usr/bin/cvlc --rtsp-tcp rtsp://user:[email protected]:554/ch01/0 --sout '#transcode{acodec=mp4a,ab=32,channels=1,samplerate=8000,scodec=none }:rtp{dst=239.1.1.81,port=20000,mux=ts,sap,name=frontdoor,ttl=10}' --play-and-exit" ffmpeg command: ffmpeg -nostdin -i rtp://239.1.1.81:20000 -map 0 -c:a copy -c:v copy -y -f segment -segment_time 60 -reset_timestamps 1 -strftime 1 ./today/%Y%m%d _%H%M%S_frontdoor.mp4 -loglevel quiet

Today's meal is salmon, but unlike last time on the sandwich press this time it's baked. If you're in ketosis then this is a good meal for you.

I've been getting lots of message asking where I am, and if I'm going to be making more videos. This video explains some of the reasons I may or may not be making more videos.

Demonstration of how an IGMP querier keeps a multicast network fully functional.

This video demonstrates some of the things I plan on using a Raspberry Pi for in a van. It will act as a mobile 3g/4g connected router and access point, and VPN back to home to allow remote access to it wherever it is. This can be used to watch the Blackvue dashcam live directly within my own network. The Tesla is indeed for sale https://www.carsales.com.au/cars/details/2017-tesla-model-s-p100d-auto-awd/SSE-AD-6587532/?Cr=1 Big thanks to this guy for his write up on how to set up the AP https://blog.thewalr.us/2017/09/26/raspberry-pi-zero-w-simultaneous-ap-and-managed-mode-wifi/

Looking at ARP on a Linux computer using the CLI and Wireshark.

If you want to work with networks, then you'll need to work with Wireshark. This video will go through the install so you can start looking at those packets.

This video shows how to install programs on a Debian Linux system. I'll be installing tcpdump in this example, but the method is the same for most others.

Adding an access point to a wired network for wireless connectivity.

Detailed walk through of how multiple networks are connected via routers.

The relationship between and IP address and a network mask. This video shows how to use binary to get a full understanding of how networks work.

Networks and routers, using monkeys in cages for examples. Nothing too technical and no tricky numbers in this video!

Explanation of what a server is, using SSH as an example.

Introducing some basic but common Linux commands to get started with using Linux as your ultimate network tool

Overview of what layer 4 does in the OSI model. If you're talking about port numbers, you're talking layer 4.

Layer 3 of the OSI model is the Network layer. It's what makes the packets get around between different networks.

An overview of the functions of the Data Link layer, which is layer 2 in the OSI model.

Introduction to the OSI model for networking, starting with layer 1, the physical layer. OSI Model https://en.wikipedia.org/wiki/OSI_model Physical Layer https://en.wikipedia.org/wiki/Physical_layer

Introduction to binary and hexadecimal numbering systems. This is how the computer thinks, so we must also think like the machine.

Now we're getting serious with a network switch so we can add more hosts to the network.

We will progress our network by adding a DHCP server so that network hosts get their IP address automatically

Now it's time to connect two network hosts together to officially form a network

Now it's time to install Proxmox to be our VM server.

Now it's time to install Debian onto a computer so we can start having fun with networks.

We're about to go through everything required to set up a network, starting at the start. The first step is to get an operating system on your hardware so we've got something to use. In this video, we'll put an operating system that we downloaded onto a USB memory stick so that we can boot the computer with it and install it onto the hard disk. Debian https://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/ Rufus https://rufus.ie/ dd https://man7.org/linux/man-pages/man1/dd.1.html Etcher https://www.balena.io/etcher/ ISO https://en.wikipedia.org/wiki/ISO_image

Installing some LIFX smart bulbs and initial setup on OpenHAB

Looking at this Wi-Fi network controller power outlet in depth. This video examines the protocols used, and how you can also use it without the official app. I'd like to thank these guys for providing some incredibly useful info. https://www.softscheck.com/en/reverse-engineering-tp-link-hs110/

Packet capture of 802.11 association frames, and reassociation frames.

A full explanation of what a VPN is and how it operates from a networking point of view.

A look at the numbers for Tesla Powerwall after its second year of operation.

How to get the source of an online radio station so you can play it on your own media player without having to have a web browser open.

While preparing an upcoming video on how I make a song from start to finish, I got to the trumpet part and realised the trumpet's tuning slide was stuck. This video shows how I managed to finally get it moving again. Keep a look out for the upcoming video on creating a song.

How much can a Tesla P100D be charged from a 5.4kW solar system on the longest day of the year?

Have you ever needed to help someone behind a corporate firewall with something on their private network? In this video I show you how. Chopper reference here: https://www.youtube.com/watch?v=unkIVvjZc9Y

Setting up a Linux host to do Wi-Fi packet captures. Note: The adapter driver must support being put into monitor mode.

Doing packet captures on a remote host using tcpdump, but viewing them locally on Wireshark in realtime. ssh root@host "tcpdump -U -w - 'not (host 192.168.1.31 and tcp port 22)'" | wireshark -k -i -

Setting up capture filters to captuer by specific ethertypes, such as LLDP, EAP, ARP, etc. This helps to prevent your capture file from being massive when it doesn't need to be.

Introduction into what Wireshark is, and how to do some captures.

Setting up enterprise grade Wi-Fi security on your home router with 802.11i port security.

802.1X port security using a Raspberry Pi as the supplicant host joining a switched network. Complete system of RADIUS, switch and wpa_supplicant

Having a look at a packet capture of some beacons, and paying attention to the interval between them.

You have to be careful with your filters when capturing fragmented packets. This video shows you the right way to do it.

Showing how to use SSH keys to make SSH login quicker and easier.

Looking at some of the virtual machines and network config in a home network that's a bit out of the ordinary.

Taking a look at the radio details of capture Wi-Fi frames with the radiotap.

Taking a tour of what network devices I have on my home LAN. There might be more than one Raspberry Pi. For the follow up video of the logical setup, leave comments/questions about what you'd like to know more about and I'll see what I can do.

An in depth look at the 4-way handshake process that happens when a Wi-Fi client joins the network.

Explanation of a passphrase and a PSK used in a secure Wi-Fi network.

Using software defined radio (SDR) to look at the HomeLink signal transmitted by a Tesla. The idea for this video came from this forum thread: https://teslamotorsclub.com/tmc/threads/problematic-homelink.114222/

Setting up a copule of NICs to form a bridge, and then using that bridge to see what a smart TV does on a network

Using ARP to determine if a host is up on the network when regular ping requests get no response. In this example, I'm pinging a Tesla car.

Packet capture showing the difference between a hidden SSID and a non-hidden SSID.

Building a bed frame with custom mattress in a Tesla Model S.

Step by step demonstration of PXE booting from TFTP server, with Wireshark packet capture and analysis.

Have you ever wondered how much charge you could put into an electric vehicle just from a typical home solar system? In this video I show you the answer.

One of the common problems Windows users face when trying to get packet captures of VLAN tags with Wireshark. This is the wire tap device https://greatscottgadgets.com/throwingstar/

Setting up a port mirror across a network, to view using Wireshark on a remote host.

Compilation of clips from the Blackvue dashcam in the Tesla Model S P100D. And no, I don't speed.

How to reset the Neurio power meter within the Tesla Powerwall when it stops responding.

Connecting an ultrasonic device to a Raspberry Pi to measure distance to the water surface in a tank. This will be used to determine how much water is in the tank. Raspberry Pi ultrasonic explanation https://www.youtube.com/watch?v=xACy8l3LsXI Voltage divider https://en.wikipedia.org/wiki/Voltage_divider

Removing beeps from various devices to get a bit of peace and quiet

Full walk through of how to install LibreNMS on a Raspberry Pi 3 running version 2019-07-10-raspbian-buster-full

Today I'm turning my walk in wardrobe into a vocal recording booth.

Installing Reaper digital audio workstation (DAW) on the Raspberry Pi 4.

Installing Swann home security cameras with custom video server. All cameras are streamed as multicast and form part of the SAP announced video network.

Along the way of intstalling my new computer in the rack mount case, I got a bit excited and damaged one of the hard disks. This video shows how I went about fixing it. I also got a dead Macbook screen during that week.

Installing a Swann NHD 886MSD 4k security camera, and deep dive packet analysis.

Using a Raspberry Pi together with a couple of balanced audio sound devices, we can create a virtual multi-track recording device. By doing this, it is possible to record four tracks in one go. This is good for when you want to adjust individual tracks after the recording has been made. I also explain the difference between balanced and unbalanced audio cables.

The nerd's guide to roast pork, with the perfect crackling. Warning: This video WILL make you hungry!

The safe way to remove dust from a computer. More info on those spray cans here https://www.youtube.com/watch?v=kjraelDMrFQ

Compilation of clips from the Blackvue dashcam in the Tesla Model S P100D. And no, I don't speed.

Three LCDs connected to a single Raspberry Pi in an equipment rack mount.

Cleaning the solar panels to see how much of a difference it makes to their output power. They weren't very dirty to begin with but after over a year I thought I'd do it anyway.

The simplest and easiest way to cook salmon. Quick and easy, with minimal cleaning

Setting up WPA3 on a Raspberry Pi. In this video I show the process of setting up a Raspberry Pi as a WPA3 client, including building, config, and packet captures. These instructions work on other flavours of Linux too. Some commands used in the video are as follows. Required to install: apt-get install libnl-3-dev libssl-dev libnl-genl-3-dev -y wget https://w1.fi/releases/wpa_supplicant-2.7.tar.gz Required in the wpa .config file for building: CONFIG_IEEE80211W=y CONFIG_DPP=y CONFIG_SAE=y CONFIG_SUITEB=y To check what the wireless NIC is capable of: iw phy phy0 info | more wpa_supplicant.conf network={ ssid="wpa3" sae_password="asdfasdf" proto=RSN key_mgmt=SAE ieee80211w=1 }

Living with solar, battery, and electric car. In this video I provide a detailed breakdown of the power usage over a full year.

My favourite software to view IPTV or any other type of media files.

Covnverting UDP multicast IPTV into TCP, and preventing multicast from flooding a network.

Setting up a SAP server on a Raspberry Pi. This distributes the available channel list to clients listening for SAP messages on the network.

Demonstration of the problems of multicast over Wi-Fi if not done correctly.

Demonstration of how L3 multicast packet maps to L2 multicast frame. I also show the difference between a switch with IGMP capability, and one without.

Setting up a multicast tv streaming server using a Raspberry Pi, or any Linux host. The Raspberry Pi will tune in the TV signal and serve each channel as a multicast group on the network.

Just a quick little side video to show the reception capability of the little telescopic antennas that come with many USB DVB-T adapters. They work if you're close to the transmitter, but pretty useless once you get to a normal location

Looking at the various packet identifiers (PIDs) of a digital TV stream, as well as the bandwidth they use.

This video shows the procedure of installing a DVB-T adapter on a Linux host. This works for desktop Linux, as well as the Raspberry Pi. Devices used in this video: ID 07ca:3835 AVerMedia Technologies, Inc. AVerTV Volar Green HD (A835B) ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T

Differences between analogue and digital television RF signals. Includes a look at the RF spectrum of some digital television channels. This is just a very brief overview. There will be further videos going into much more detail.

A brief recap of analogue TV for those who have never seen it before. This is the first video in a series which will cover digital TV, and IPTV. All frequencies are based on the Brisbane transmitter.

This video shows the difference between a cheap and nasty remote control, and a better rolling code remote control. It looks at the RF spectrum, and the bitstream.

Raspberry Pi based home alarm system, using PiFace. Python alarm system, providing monitoring of motion sensors, and remote buttons. Also acts as a server for remote control from Android client.

How to install PiFace on a Raspberry Pi. apt-get update apt-get install python{,3}-pifacecommon apt-get install python{,3}-pifacedigitalio # Edit /usr/lib/python2.7/dist-packages/pifacecommon/spi.py # Edit /usr/lib/python3/dist-packages/pifacecommon/spi.py # create the spi transfer struct transfer = spi_ioc_transfer( tx_buf=ctypes.addressof(wbuffer), rx_buf=ctypes.addressof(rbuffer), len=ctypes.sizeof(wbuffer), speed_hz=ctypes.c_uint32(50000) )

2 x Blackvue DR900S-2CH (4 cameras) in Tesla P100D. 4k cameras in the front and rear, and FHD cameras on the sides. The ffmpeg script I used can be found here: https://cwne88.com/index.php/dashcam/auto-4-cameras/

GPS data is contained within the .mp4 file itself. It can be exacted easily as shown in this video.

Dashcam video editing from Blackvue DR900S-2CH. Video from a variable frame rate source must be converted to constant frame rate before editing. ffmpeg is great for doing this task, and can be scripted to automate the process. Some example scripts can be found here: https://cwne88.com/index.php/dashcam/auto-rear-mirror-hd/ https://cwne88.com/index.php/dashcam/

Looking in depth at how the Blackvue phone app communicates with the dashcam. By knowing this, we can get the files from the dashcam without having to use the app. This means we can write custom scripts for things too, which enables us to automate it how we like. URLs for the important things: Version http://10.99.77.1/Config/version.bin Config http://10.99.77.1/Config/config.ini File list http://10.99.77.1/blackvue_vod.cgi View front camera (mjpeg stream in VLC) http://10.99.77.1/blackvue_live.cgi View rear camera http://10.99.77.1/blackvue_live.cgi?direction=R Get thumbnail (jpg) http://10.99.77.1/Record/20190104_092709_PF.thm

Blackvue DR900S-2CH dashcam install on Tesla Model S P100D. Front (4k) and rear (1080p) cameras.

The Tesla Forward Collision Warning used to be able to be set by the user and stored. Now, Tesla have forced it to revert to its default of 'on' even if you don't want it on. It's just another example of how Tesla make changes to the car, and mess with things that work, without giving the driver OPTIONS of whether they want to use them or not. This is why I also had them remove auto pilot, because I wanted real cruise control that does the speed I set it to, not something that randomly puts on the brakes because it thinks it knows what's what. Examples: Automatic high-beam headlights - They don't work very well at all. These can be turned to manual so I still have control. Options = Good. Automatic rain sensing wipers - A bit random in their actions. These can be set to standard intermittent. Options = Good. Automatic speed cruise control - This brakes and slows down randomly all the time. This cannot be turned off if you have autopilot installed. No options = Bad. The workaround is to get Tesla to remove autopilot so you can set a cruise speed and the car sticks to it. Forward collision warning - As shown in this video, cannot be turned to always off.

Installing 12 volt LED strip lighting into a wardrobe.

This modifiation allows you to change the Tesla wall charger current via a web interface on a Raspberry Pi. You can also have it change automatically to a value determined by the amount of solar power you are producing. This allows you to charge only with the power you are getting from solar, and adjusts it accordingly as the solar power changes throughout the day. Code https://github.com/cdragon/TWCManager Instructions https://github.com/cdragon/TWCManager/blob/master/TWCManager%20Installation.pdf Forum link with Powerwall info https://teslamotorsclub.com/tmc/threads/new-wall-connector-load-sharing-protocol.72830/page-19

Installing Proxmox from scratch

Connecting TV audio output to speakers from the headphone output via an amplifier. In case you're wondering what I'm listening to, it's SBS Chill coming from the Raspberry Pi TV server.

First power bill for complete three month period between winter and spring. Granted, most people drive to work in the morning and would therefore be unable to use that solar at home during the day, but if it's possible to do that then it works out well.

Setting up a home cinema, using a Raspberry Pi running Kodi for the player, with a Logitech Z906 speaker system for surround sound and a Benq TH683 projector for the picture. All up it cost under $2000 without the projector screen, but including all the cables and extra bits that add up. The screen cost about $800, but if you have a large empty wall you can just use that.

The Powerwall, like many other consumer devices, makes poor channel choices for Wi-Fi. The channels that should be used in 2.4GHz (if you HAVE to use 2.4GHz in the first place) are channels 1, 6, or 11. This avoids channel overlap and therefore interference with neighbouring APs. Compound this with the 1Mb/s bitrate that this system (and again, most other consumer systems) and that interference travels much further. This is because 1Mb/s is decodable much further away than a higher bitrate with more complex modulation is. Also note the Powerwall's Wi-Fi interface mostly stays as an AP for the Neurio meter to connect to, but from time to time stops broadcasting beacons, and instead chooses to probe around like a Wi-Fi client.

Tesla Powerwall test running off grid for a week. The system stayed online, and didn't run out of power. It was a sunny week (mostly).

One amp dedicated to power the two 10 inch subs, and another 8 channel amp to power the four sets of speakers in the car.

Testing the Powerwall while disconnected from the grid. This is a second test, this time while monitoring the various meter readings and other data to try and see what's going on.

Solar systems are not as simple as some may think. This is a demo of what can happen when battery is near full, lots of solar coming in, and not grid connected. Basically, is solar production is high but nowhere for it to go, there can be problems. Also, if anyone is in Brisbane and has a different type of solar/battery setup, please get in touch with me at [email protected] as I'd like to see what else is out there in the real world.

Installing a 20x4 LCD in a standard wall plate in the kitchen to monitor the Tesla Powerwall. I will put the python script online somewhere once I clean it up a bit for those who are interested in running this themselves.

How to install SNMP on a Raspberry Pi for network monitoring. This screenshot shows custom Powerwall monitoring I made for Librenms https://snag.gy/AgdFHI.jpg

Recording of the Tesla Powerwall doing its daily reboot. Pity it was a windy morning, but hopefully you can hear the low frequency buzzing, and also the click. This shows the two separate uptimes as the unit comes back up.

I MAY HAVE FOUND A WAY AROUND THIS (27 Apr 18) So far so good: "up_time_seconds":"57h24m54.278181833s" Check out the reboot video https://www.youtube.com/watch?v=gHsIzd6fvMY&t=1s Problems with the Tesla Powerwall that aren't so obvious on the surface.

Connecting and installing a 16x2 or 20x4 LCD screen on the Raspberry Pi. Extra LCD commands can be found here: https://github.com/adafruit/Adafruit_Python_CharLCD

This shows how the Tesla Powerwall goes together with the gateway to make the complete home power system.

New solar system installation with Tesla Powerwall battery. Panels are 315watt, and inverters are Enphase S270 270w inverters.

Microwave interferences in 2.4GHz band using iperf3 to monitor throughput on the Wi-Fi client.

The charging rate for a Tesla with different types of chargers. "How long does it take to charge?" is a common question.

Opportunistic Key Caching Showing the difference between roaming with standard 802.11i and OKC enabled.

Setting up SSH tunnels to allow various types of traffic to pass through networks that would normally have that traffic blocked. As long as SSH is allowed, you can send most traffic down the tunnel.

Most effective method to resolve Wi-Fi Internet issues

This demonstrates how LLDP passes messages about connected systems in a network. To install on a Raspberry Pi, do the following: apt-get install lldpad for i in `ls /sys/class/net/ | grep eth` ; do echo "enabling lldp for interface: $i" ; lldptool set-lldp -i $i adminStatus=rxtx ; lldptool -T -i $i -V sysName enableTx=yes; lldptool -T -i $i -V portDesc enableTx=yes ; lldptool -T -i $i -V sysDesc enableTx=yes; lldptool -T -i $i -V sysCap enableTx=yes; lldptool -T -i $i -V mngAddr enableTx=yes; done

Wi-Fi packet capture and analysis on a Tesla.

I just did a trip from Brisbane to Melbourne in the Tesla, and visited all the superchargers currently available.

This will add a new loopback interface which is internal to the Linux box. It will then set up a route so that multicast traffic will go to that loopback interface instead of leaving the physical network interface. Then with the help of a UDP to TCP proxy, we can connect to the TV server via TCP unicast, and access the UDP multicast from inside. The server now has to produce as many individual network streams as there are users wanting to connect. This means that the server has to do more work than when it was multicast. Multicast is scalable, but unicast could be used in small setups for experimenting with. Commands To make a new loopback interface: ifconfig lo:1 127.0.0.2 To see interfaces: ifconfig To view routing table: route To add route for multicast to new loopback interface: route add -net 224.0.0.0 netmatk 240.0.00 dev lo:1 To look at network sessions: netstat -n To download udpxy program: wget http://www.udpxy.com/download/1_23/udpxy.1.0.23-9-prod.tar.gz Unzip, build and install: tar xvf udpxy.1.0.23-9-prod.tar.gz cd udpxy-1.0.23-9 make cp udpxy /usr/bin/ Run the udpxy program (must be root if you want to use port 81) udpxy -p 81 Connect from client VLC by opening network stream http://192.168.1.35:81/udp/239.0.0.11:20000 where 192.168.1.35 is the server IP address, and 239.0.0.11 is your multicast address.

This method enables you to see the actual IP traffic of a Wi-Fi client that uses WPA encryption. You must know the WPA passphrase, and capture a 4-way handshake for that client.

Installing SDR program to receive ADS-B to see aircraft information. Download program from here: https://github.com/MalcolmRobb/dump1090/archive/master.zip unzip master.zip cd dump1090-master make cp dump1090 /usr/bin/ cp view1090 /usr/bin/ dump1090 --interactive You can also set it up as a server with: dump1090 --interactive --net --net-beast --net-ro-port 30005 Then start a client: view1090 --net-bo-ipaddr {server IP} Antenna is Diamond D3000N from www.strictlyham.com.au

This will stream video in MJPEG format from a supported webcam over the network. Cameras shown in video: Logitech, Inc. Webcam C270 Microsoft Corp. To check the capabilities of the webcam: v4l2-ctl --list-formats To install the programs: apt-get update apt-get install vlc To start the stream server: cvlc --no-audio v4l2:///dev/video0 --v4l2-chroma MJPG --sout '#standard{access=http,mux=mpjpeg,dst=:8554/}' -I dummy To view on VLC on a computer, open network stream with this address: http://x.x.x.x:8554 ...where x.x.x.x is the IP address of the Raspberry Pi

Demonstration to show how data throughput is affected when overlapping channels are used.

How to capture Wi-Fi packets using Wireshark on a Macbook

This is my new setup Raspberry Pi multicast TV server in a single unit rack mountable enclosure. It does get warm though, so I'm going to add a couple of little fans on the side, and power them from the spare USB ports. For setup details, see my other video https://www.youtube.com/watch?v=KI0LuIcFM98

Adding an additional access point to your home network to extend the Wi-Fi network to other areas.

Setting up a Raspberry Pi as a DHCP server sudo bash # Set static IP in file /etc/dhcpcd.conf static value interface eth0 static ip_address=192.168.20.1/24 static routers=192.168.20.254 static domain_name_servers=8.8.8.8 # Reboot the Raspberry Pi reboot # Update and install server apt-get update apt-get install isc-dhcp-server -y # Edit DHCP server config file /etc/dhcp/dhcpd.conf subnet 192.168.20.0 netmask 255.255.255.0 { range 192.168.20.60 192.168.1.70; option routers 192.168.20.254; option domain-name-servers 8.8.8.8; } # If you want the options for an Aruba AP, also add option vendor-class-identifier "ArubaAP"; option vendor-encapsulated-options "192.168.1.200"; # Start the server dhcpd -cf /etc/dhcp/dhcpd.conf

Setting up a Raspberry Pi as a RADIUS server sudo bash apt-get update apt-get install freeradius -y # edit /etc/freeradius/clients.conf ### Add to file client 0.0.0.0/0 { secret = {RADIUS shared key} shortname = any } ###### # edit /etc/freeradius/users ### Add to file testuser Cleartext-password :="password" service freeradius restart

Since many people have been asking, I thought I'd give a brief overview of the network setup I have here. The equipment is mostly enterprise grade and certainly overkill for a general home network. A lot of this setup can be done with cheap home grade parts to get pretty good results if set up correctly. I may at a later stage go through some of the logical components of the network.

Setting up a Raspberry Pi as an FTP server mkdir -p /home/pi/files/ chmod 777 /home/pi/files/ sudo bash apt-get install pure-ftpd -y pure-pw useradd pi -u pi -g pi -d /home/pi/files/ # Make password raspberry pure-pw mkdb ln -s /etc/pure-ftpd/conf/PureDB /etc/pure-ftpd/auth/60puredb service pure-ftpd restart

Setting up a Raspberry Pi as a TFTP server wget http://downloads.sourceforge.net/project/tftp-server/tftp%20server%20single%20port/opentftpspV1.66.tar.gz tar xvf opentftpspV1.66.tar.gz cd opentftp/ g++ opentftpd.cpp -oopentftpd -lpthread mkdir /home/pi/files chmod 777 /home/pi/files/ sudo bash cp opentftpd /usr/bin/ vi /etc/opentftp.ini ## File contents ## [LISTEN-ON] [HOME] /home/pi/files [TFTP-OPTIONS] username=pi ThreadPoolSize=10 Read=Y Write=Y Overwrite=Y ################## /usr/bin/opentftpd -i /etc/opentftp.ini

Setting up a Raspberry Pi as a web server mkdir -p /home/pi/files/ chmod 777 /home/pi/files/ sudo bash apt-get install apache2 -y rm -rf /var/www/html/ ln -s /home/pi/files/ /var/www/html

Setting up a Raspberry Pi as a samba server mkdir -p /home/pi/files/ chmod 777 /home/pi/files/ sudo bash apt-get update apt-get install samba -y rm /etc/samba/smb.conf vi /etc/samba/smb.conf ## File contents ## [global] netbios name = server server string = server workgroup = WORKGROUP security = user [server] comment = server path = "/home/pi/files/" public = yes guest ok = yes read only = no ################### pdbedit -a -u pi # set password to raspberry service smbd restart

Setting up a Raspberry Pi as a syslog server. mkdir -p /home/pi/files chmod 777 /home/pi/files sudo bash apt-get install syslog-ng -y # Edit the config file /etc/syslog-ng/syslog-ng.conf # Change the file permision setting in the config file from 640 to 644 options { chain_hostnames(off); flush_lines(0); use_dns(no); use_fqdn(no); owner("root"); group("adm"); perm(0644); stats_freq(0); bad_hostname("^gconfd$"); }; # Put these three lines into the config file too source s_net { udp(ip(0.0.0.0) port(514)); }; destination d_files { file("/home/pi/files/${YEAR}_${MONTH}_${DAY}__${HOST}"); }; log { source(s_net); destination(d_files); }; # Save the config file, then restart the server service syslog-ng restart

Testing performance with more than one TV tuner installed.

Install rtl_tcp server on Raspberry Pi sudo bash apt-get update apt-get install cmake -y apt-get install libusb-1.0-0.dev -y git clone git://git.osmocom.org/rtl-sdr.git cd rtl-sdr/ mkdir build cd build/ cmake ../ -DDETACH_KERNEL_DRIVER=ON -DINSTALL_UDEV_RULES=ON make make install ldconfig Run it with rtl_tcp -a {IP Address}

Setup instructions for turning a Raspberry Pi into an IPTV multicast server. Tuner is AVerMedia AVerTV Volar Green There are 2 models, but the good one uses firmware dvb-usb-it9135-02.fw The other one uses dvb-usb-af9035-02.fw but that didn't seem to work as well and got hot. They look the same on the outside though. ID 07ca:3835 AVerMedia Technologies, Inc. AVerTV Volar Green HD (A835B)

Multicast IPTV over Wi-Fi

Harmonics, Sine/Square Waves, Clipping

Packet capturing using an Aruba Instant AP

Packet capturing using a controller based AP on an Aruba system

WEP, WPA, Key, 4-Way Handshake

This video shows how having a bandpass filter on the input to the receiver reduces the effects of out of band interference. In this case there was a mobile phone tower about 500 metres away, no doubt running at high power. Even though its operating frequency isn't in the 2.4Ghz band, if its RF gets into a receiver, there are harmonics and sidebands and all sorts of things that spill into our band, causing problems. The demonstration with this spectrum analyser shows the difference in the noise floor when using a filter in-line, and connecting the antenna directly to the spectrum analyser. I know this isn't an AP, and there are other things at play with the spectrum analyser settings, but it's just to show that out of band interference can be a problem if not filtered on the input to the receiver.

Commands to put network card in monitor mode: airmon-ng start wlan0 11 airodump-ng -c 11 wlan0 Wireshark capture filter (no beacons) wlan[0] != 0x80

This shows that different modulation is used for different 802.11 physical data rates

This shows how much a microwave over transmits in the 2.4GHz band

Using a spectrum analyser, we can see a true representation of how busy an 802.11 channel really is.

This video shows what the RF energy looks like in the 2.4GHz band when 802.11 data is being transferred. The display shows layer one of the OSI model.