Bed Wetting Pad with Arduino Alarm

Projects General Guidance
1

Hello,

I am building an alarm for a bed wetting pad my grandma uses. The alarm it comes with is loud and obnoxious and I want to build a silent alarm that connects to WI-FI to notify me. The pad is essentially a positive and negative wire which terminate in a 3/4" jack. I desoldered the jack input and I want to connect that to my Arduino. Do I need to build a circuit to be able to detect if the pad is wet or not or can I simply use the analog and digital pins on the arduino to accomplish this task? Any guidance or experience with a build like this?

Thank you!

2

Connect one wire to ground and the other to an analogue input. Then connect a 10K resistor from the same analogue input to +5V.

Then read that analogue input. The reading will drop as the pad gets wet. Print out the readings so you can see where to set the threshold for your alarm.