Its-g5
| Project ITS-G5 | |
|---|---|
| File:Yunopicture.png | |
| Investigating ITS-G5 signals | |
| Status | In progress |
| Contact | bertrik |
| Last Update | 2026-06-20 |
Introduction
This page is about investigating reception and processing of so-called C-ITS or ITS-G5 signals, see also https://en.wikipedia.org/wiki/Vehicle-to-everything These signals are exchanged between passenger cars, emergency vehicles, traffic lights and other traffic-related equipment.
An ESP32-C5 development board is capable of receiving WiFi in the 5 GHz band and can receive/sniff these kinds of packets from live traffic.
Stuff to investigate:
- Source code for an ITS-G5 receiver https://github.com/pit711/v2x2map
- Crowd-sourced live map of messages received: https://opentrafficmap.org/
- Simplest source code for Arduino-based sniffer: https://git.devlol.org/jstsmthrgk/simple-its-g5-receiver-firmware
In the Netherlands, SPAT/MAPem messages are not transferred over wifi-p, but over UDAP. You need credentials to access that data, it is not clear if it is feasible to hobbyist to access it. Interesting project: https://github.com/idkmanLool9/Verkeerslicht
Hardware
I got this board, and it worked for me: https://nl.aliexpress.com/item/1005012416463528.html
It has an onboard antenna. There are also other boards with an antenna connection, which allows using an external antenna. This may be better, I don't know yet.
Software
TODO
