Raspberry Pi measuring Voltage
I'm always a little confused that as soon as someone wants to get an analog measure to a Raspberry Pi(RPi) they are often taking a detour via an Arduino/ESP or some other microcontroller. Why not just take an Arduino peripheral and use it together with a RPi ? In my case I needed to measure the voltage across a fresh water tank level sensor in our boat, but i could be any DC voltage. Hints for sending the data to a Signal K (SK) server is found below. In this post I will use an ADS 1115 (AD), or ADS 1015, as AD converter.