IoT Relay - Can I monitor power?

Using Arduino General Electronics
1

Greetings:

I have the following IoT Relay from (iotrelay.com). I will be using an Arduino Uno R3 to control the relay. My Arduino will have a battery power source. My ultimate goal is to use the Arduino and this relay to create a slight delay in powering on a device following a power outage. Can I monitor incoming power to the relay using an Arduino? I understand how to switch the device off and on with the Arduino, but the monitoring of the power is the critical step in the problem I am trying to solve.

Please note that I am a beginner, so any plain-language guidance would be greatly appreciated.

Thanks!

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You can plug a 5v USB POWER module into your AC.

When there is AC power, there will be 5v on the output of this module.

No AC, module voltage is 0v.

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1 Like
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Ok, that makes sense — thank you!

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