ESP32-C5 Reads Traffic Lights with W5500 Ethernet

Added: 2026-06-03

[00:00:00]That traffic light is talking. The bus is talking too.

[00:00:03]Not with words, with [music] traffic messages. Position, speed, direction, signal timing.

[00:00:09]Most people never hear them, but a tiny receiver can.

[00:00:12]That is the idea behind OpenTrafficMap.

[00:00:15]It listens for CITS [music] messages from traffic lights, trams, buses, and cars.

[00:00:20]Then those packets become data, MQTT, Wireshark, JSON.

[00:00:25]A live traffic map.

[00:00:28]But here is the problem. [music] A live map is useless if the receiver drops offline.

[00:00:33]So fixed [music] receivers need a stable path back. In a W5500 build, Wiznet W5500 can give the ESP32-C3 [music] receiver a wired ethernet connection.

[00:00:43]The road broadcasts, the receiver listens, the map comes alive. Would you map [music] your city?

[00:00:50]Comment traffic.