Arduino relay not working bluetooth

Projects General Guidance
1

Hi.
I have a setup composed of a relay connected to an Arduino Uno and powered by a ESC. The idea is, I'm controlling a BLDC via bluetooth and the RemoteXY app, and using a relay to change the direction of the motor (ESC is not bidirectional).

The problem is that I can't change the state of the relay. Theoretically, when I press on a switch on my phone, the relay should be open/closed. Instead, nothing happens. I've checked the pins connected to the relay; they are powering on/off, so I doubt that it is a coding issue.

One weird bug: if I short the signal wire to the ground, the relay turns on.

2

Indicates your logic may be inverted.

3

Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project :wink: See About the Installation & Troubleshooting category.

4

The relay won't switch whether its pin is high or low, so I don't think that's the issue here

5

Well it is the issue to some extent as GND triggers relay and your pin doesn’t therefore your pin does not equal GND

6

It's probably time you provided details of the relay and a connection diagram.

7

Yeah, I don't know what I fixed exactly, but I have disassembled and reassembled everything and now it works just fine, soooooo sorry for wasting your time.

8

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