So I want to build a arduino powered semi trailer light tester that will hook up via Bluetooth to my phone.
When I need help with is I'm not sure how to detect voltage across all 7 wires and have the arduino interface with it. I basically want to be able to program in if then statements for different voltage draws.
You need to start by explaining exactly what it is you want to do.
Once you have a plan, you can begin to work out how to follow it.
You may find some ideas with a forum search on 'light tester' or 'cable tester'.
My bad, I thought I was clear.
There are 7 12v wires that I want to be able to detect the voltage and amperage on, I'll have if then statements stating issues that we know said voltage and amperage for.
They'll give a status and send it as a string back to the phone to update the app.
I have the app backend mostly figured out, just not a method of reading the voltage and amperage.