From The Munich Maker Lab's Wiki
Jump to navigation Jump to search
Attention.png You are visiting an old member project. The information found on "Trafficlight" might be out of date. The traffic light is using a Multiswitch and LEDs were retrofit.
Internet of Trafficlights (IoT)

Release status: beta [box doku]

Description A trafficlight connected to the internet
Author(s)  tiefpunkt
Download  GitHub Repository

We have a traffic light in the space that can be controlled via the internet.


  • Trafficlight
  • 3 12V motorcycle lamps (2x25W)
  • 8-channel relais board
  • nodeMCU (ESP-12) WiFi microcontroller
  • PC powersupply
  • A PC fan to put some load on the PSU even if all lights are off (otherwise it would just shut off)
  • Circuit: WiFi_Ampel_MuMaLab.pdf

WiFi Ampel MuMaLab Foto klein.jpg


MQTT Topics

All lights can be switched via a 1 or a 0 to the following topics:

  • mumalab/room/trafficlight/red
  • mumalab/room/trafficlight/yellow
  • mumalab/room/trafficlight/green