Best
sorry for my english i am not that clear what i am writing.
but I try to explain.
I have 2 motorcycles and a camper and an oltimer in a garage about 5 km from my house. i want to measure the battery of the vehicles 2 times a day and send the information to thingspeak.
if the voltage of the battery falls below the threshold, thingspeak sends an email or twitter or text message to my mobile phone.
is there anyone who has already made this?
and who would like to share the code?
This is a relatively simple circuit as an Arduino can read voltages. You will need to have two resistors to scale the voltage down from 12 (I’d think 14.5V for a fully charged battery) to the voltage of the circuit you are using.
You should Google for ADC and voltage divider and Arduino. To be honest, this is basic stuff, so you’ve already done the hard work getting your LoRa Node working!