Photon - Arduino communication

[wgbartley]

If it's not timing-sensitive (like microsecond-sensitive), UART may be the easiest way to go.

I did a quick write-up on it a while back:

Spark (3.3v) to Arduino (5v) Serial Communication

This is in reference to another thread, but I got a Spark talking via serial to my Arduino Uno using a logic level converter (I actually used one from eBay, but it works the same). The goal of this little test is to see if I could write from the Spark to the Arduino and listen for any serial data that the Arduino might generate. It’s pretty simple and straightforward. Since my test Arduino is an Uno, I’m limited to SoftwareSerial, so I had to scale down the baud rate. I will eventually tap t…