====== OpenTrafficMap Wiki ======
**[[http://opentrafficmap.org/|OpenTrafficMap]]** is an open project for visualizing and analyzing C-ITS data (Cooperative Intelligent Transport Systems). Its goal is to make visible which data traffic lights, trams, buses, and modern cars are already transmitting unencrypted today.

Live map: https://opentrafficmap.org  \\
Code: https://codeberg.org/opentrafficmap

[[http://opentrafficmap.org/|{{::graz_opentrafficmap.png?600|}}]]

===== What is C-ITS? =====
**C-ITS** stands for **Cooperative Intelligent Transport Systems**: vehicles and infrastructure communicate with one another.

More details can be found on the [[en:c-its:start|C-ITS]] page.

With your help, we receive C-ITS messages and display them on our map.


===== Contributing to the map =====
Since C-ITS can only be received over a few hundred meters up to a few kilometers, we can only show live data if at least one receiver is nearby. We use the ESP32-C5, which costs only a few euros and offers good reception with the PCB antenna of the ESP32-C5-WROOM module.

We have developed a board on which the ESP32-C5 is connected to an SPI-to-Ethernet chip and which can be powered via PoE. With a 3D-printed enclosure, the receiver board can be mounted outdoors (the higher, the better).

There are several ways to get a receiver:
  - Order one yourself from any PCB manufacturer (Gerber, BOM, and CPL files: [[https://codeberg.org/opentrafficmap/its-g5-receiver/releases|opentrafficmap/its-g5-receiver/releases]])
  - Wait for our group order
  - Build a receiver yourself using an ESP32-C5 dev board (readily available online in Europe)

If you build a receiver yourself, there are also several ways to feed the data into OpenTrafficMap:
  - Connect it directly to the internet with an SPI-to-Ethernet chip (W5500, ENC28J60): [[https://codeberg.org/opentrafficmap/its-g5-receiver-firmware|opentrafficmap/its-g5-receiver-firmware]]
  - Connect it to a Raspberry Pi via USB / UART with this project: [[https://git.devlol.org/jstsmthrgk/simple-its-g5-receiver-firmware|jstsmthrgk/simple-its-g5-receiver-firmware]]
  - Connect it to an Android phone via USB with this project: [[https://codeberg.org/sascha8a/cits-to-go|sascha8a/cits-to-go]]
  - FritzBox 3390 with [[https://github.com/MPW1412/avm-fritz3390-802.11p-otm/releases/tag/v0.3.0]] and [[https://github.com/MPW1412/openwrt-otm-bridge]]
  - with [[https://github.com/pit711/v2x2map]]
  - with the ESPHome/Home Assistant integration: [[https://github.com/hn/esphome-its-g5]]
More information about the MQTT server and the (optional) node registration: [[en:node_registration|Node Registration]]


===== Group order =====
At the beginning of April, we ordered 200 fully assembled C-ITS receivers. **We expect them to arrive in mid-May 2026.** We pass the boards on at cost price for €20, including a 3D-printed enclosure. As soon as the boards have arrived, we will open a Pretix shop where you can place your order. We plan to offer the following options:
  - **Pickup** at [[https://realraum.at/|realraum]] in Graz (after confirmation that the receiver is ready for pickup)
  - **Shipping** within Austria (€4.20 shipping, via GLS)
  - **Shipping** to Germany (€10.90 shipping, via GLS)
  - **Shipping** with your own Post.at / GLS / DPD parcel label (free)

To take part in the group order, you can place an order in our Pretix shop here: [[https://pretix.opentrafficmap.org/locale/set?locale=en&next=/otm/z798k/|pretix.opentrafficmap.org]]

===== Documentation =====

  * [[en:getting_started|Getting Started]] — unboxing, power supply, first steps
  * [[en:faq|FAQ]]
  * [[en:node_registration|Node Registration]]
  * [[en:reception|Reception & Placement]]
  * Hardware: [[en:hardware:setups|Setups]], [[en:hardware:antennas|External Antennas]], [[en:hardware:enclosure|Enclosure]], [[en:hardware:surge_protection|Surge Protection]]
  * Software: [[en:software:mqtt|MQTT Server]], [[en:software:transmission_methods|Transmission Methods]], [[en:software:home_assistant|Home Assistant]]
  * C-ITS background: [[en:c-its:start|What is C-ITS]], [[en:c-its:senders|Who is sending C-ITS?]]
  * Community: [[en:sightings|Sightings]], [[en:contributing|Contributing]], [[en:links|Links]]

===== Talk at Grazer Linuxtage =====
We gave a [[talk:grazer-linuxtage|talk]] (in German) at Grazer Linuxtage 2026, titled: **C-ITS: Tracking traffic lights, trams, and cars with an ESP32**

[[https://www.youtube.com/watch?v=gje6RnskBNA|{{:undefined:thumbnail_vortrag.png?600|}}]]

[[https://www.youtube.com/watch?v=gje6RnskBNA|YouTube]] | [[https://media.ccc.de/v/glt26-688-c-its-mit-einem-esp32-ampeln-straenbahnen-und-autos-tracken|media.ccc.de]] | [[https://pretalx.linuxtage.at/media/glt26/submissions/SRQ3M9/resources/C-ITS__Mit_einem_ESP32_Ampeln_2eRw7Fx.pdf|Slides]]