You can control the light from the Cayenne Dashboard or wireless button.
What you need:
- Arduino UNO
- Arduino ethernet shield W5100
- 433MHz receiver
- LED with resistor or relay
- Wires
- 433MHz wireless button
Code:
Cayenne Wireless button LED.txt (2.3 KB)
Sample from the Cayenne Dashboard.
Video:
https://www.youtube.com/watch?v=_fnbPIz2vLA
433Mhz Wireless button: