Detect voltage from remote module

Using Arduino General Electronics
1

Hi,

I just bought this module: https://amzn.eu/d/2ATaNED

The idea was, to power it from the 5v output of an arduino uno clone and detect the output voltage via an input pin of the arduino. I've connected the ground cables, but the state of the input pin is always "high". Any ideas to solve this?

2

You need to connect the white wire to the arduino digital pin and use INPUT_PULLUP

3

The input will go LOW when it receives a signal

4

Thnx, that did the job.

5

Have a nice day!

6

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