From The Munich Maker Lab's Wiki
Jump to: navigation, search
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
  • Picture


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