Hi everyone. I’ve a question about interfacing two boards- one a photon, the other an arduino.
Firstly, I think it should be possible, but just to check:
Is there any reason the analog pins on an arduino couldn’t measure a voltage on the photon’s breadboard, as long as they share a ground?
Secondly, since I believe that to be possible, I’ve been trying to implement it by having the arduino analog pins read the voltage from a photon digital pin. however, when I do this, the analog pin reads ~2.5V all the time, regardless of whether the photon’s pin is set to HIGH or LOW.
Any insight on this would be appreciated; it seems to me that the digital pin isn’t actually writing. Sorry if there’s documentation I’ve overlooked, but I’ve been searching without any luck.