Actuator Relay giving error

Hi ,

I am using Raspberry Pi Model 3B+ V1.3 . I am beginning Cayene and I was trying to make my first ever simple program. By adding relay switch .

Unfortunately ,its giving error and nothing that i know of is fixing it. After I choose Actuators>Relay Switch> giving it name, Integratred GPIO,channel 4, button, toggle switch its giving error like

Please fix the following errors:

  • Failed to add the sensor (Device command failed)

Are you still not able to add the relay widget?

Thanks for response. I changed the channels and it started working. Although , i find it strange that why the most of channels were not working.

For the benefit of others. Please use GPIO21.

it does not matter if it only GPIO21. you just have to not use special GPIO and already used GPIO.