Relay sensors stop communicating with gateway after a few minutes

[sundberg84]

I thought the same, it was how i detected i had 12v relays instead of 5v. I just quickly powered with 9v bat and then the relay clicked.

[rafael.brasilia]

Thanks for the heads up. But I tried 9v and 12v and no luck! They only click when powered directly from the Arduino and they stop working after a few hours.

[Nuubi]

You should probably draw a circuit diagram about your connections?

[rafael.brasilia]

@Nuubi
This is how I have my connections:

Is there anything wrong with it?
Thanks!

[korttoma]

Try adding a wire between the GND on your relay board and GND on your arduino. Even if they have seperate power source you stil need to connect GND between them.

[Nuubi]

Exactly that is the reason. Yep.

[rafael.brasilia]

YES!!! That was it! I got both relays powered from the external power supply now and everything seems to be working fine.
Thank you all very much!