Russ Garrett

Comprehensively nerd-sniped today by learning that you can receive C-ITS vehicle telemetry using an ESP32-C5.

I had things I needed to be doing.

May 26 at 8:38pmWeb
Show threadRuss GarrettMay 26

And of course there is now flightradar24 for roads https://opentrafficmap.org/

You can learn more (in German) on the wiki https://wiki.opentrafficmap.org/

OpenTrafficMap

Show threadpeterpMay 26
@russss Thank you for posting about this - we will bring some receivers with Ethernet and PoE to EMFcamp in July
Show threadRuss GarrettMay 26
@peterp oh cool! I will try and say hi!
Show thread€dward 冬May 27
@peterp Do you have any recommendations on ESP32-C5 and where to buy? I also hope to be at EMF this year.
Show threadpeterpMay 27
@smed hi, I can bring you some boards to EMF, but you can also order a C5 on amazon. It should be well stocked usually
Show threadRuss GarrettMay 30

@peterp we've got a few nodes running in London now using dev boards and this code: https://codeberg.org/russss/its-slip-gateway

Haven't seen anything except a few cars so far...

its-slip-gateway

C-ITS gateway, for passing packets from a SLIP serial C-ITS sniffer to OpenTrafficMap

Codeberg.org
Show threaditgrrl 1d ago
@russss 🤔🤔🤔
Show threadjtonlineMay 26
@russss steering wheel angle confidence?!!!
Show threadRuss GarrettMay 26
@jtonline someone clearly had a lot of fun writing the spec for this
Show threadAndreas SikkemaMay 26
@russss On the one hand I am frustrated I don’t know enough about ESP32s, on the other hand, I don’t need another project. Although more radio reception thingies would be fun. Currently at 9 (and counting probably) at 3 locations…
Show threadjarkmanMay 26
@russss Who sends that stuff?
Show threadRuss GarrettMay 26
@jarkman modern cars, apparently! (although not many yet.) Also traffic lights and other things
Show threadjarkmanMay 26
@russss oh! That is kind of amazing. Now I want to make car-responsive jewellery.
Show threadmark simpkinsMay 26
@russss oh no, I have job applications to do!! (Adding to list of radio spectrum stuff I could gather)
Show thread2mMay 27
@russss this also popped up in my news in via cnx-software (https://www.cnx-software.com/2026/05/24/opentrafficmap-esp32-c5-c-its-receiver-board-can-help-improve-traffic-efficiency-using-802-11p-v2x-communication/?amp=1) Wondering if any of the traffic lights or cars are using this in Lithuania. Placed an order for that dev board. End of the summer will be interesting!
OpenTrafficMap ESP32-C5 C-ITS receiver board can help improve traffic efficiency using 802.11p V2X communication

The ESP32-C5 C-ITS receiver project is an open-source hardware board that gathers data over 802.11p V2X communication from nearby traffic lights, public transportation (buses, trams...), trucks, cars, motorcycles, and even pedestrians to display the results on online maps. It works using the ITS-G5 protocol built on top of 802.11p V2X (Vehicle-to-Everything), which requires a 5.9 GHz WiFi radio, and makes the ESP32-C5 an ideal candidate. The standard requires a C-ITS Station (ITS-S) found in vehicles (on-board units - OBU) or roadside units (RSU) handling both transmission and reception, and a receiver to handle incoming wireless signals, decode C-ITS (Cooperative Intelligent Transport Systems) messages, and feed the data into online maps like OpenTrafficMap (See screenshot below). ESP32-C5 C-ITX receiver specifications: Wireless module - ESP32-C5-WROOM-1 (ESP32-C5-WROOM-1-N16R8 or ESP32-C5-WROOM-1-N8R8) SoC – ESP32-C5 CPU Single-core 32-bit RISC-V processor @ up to 240 MHz Low-power RISC-V core @ 40 MHz acting as the main processor for

CNX Software - Embedded Systems News
Show threadRichardMay 27
@russss Wait. Modern cars are just… broadcasting this stuff?!
Show threadcoldclimateMay 30
@russss that is an astonishing amount of info. I picked up Renault tyre pressures with a SDR a few years me ago