Photon Powered by Mega

[nrobinson2000]

Yes power it using 3.3v and ground, but to use tx/rx you will probably need to use a logic converter because the mega tx/rx is 5v while the photon is 3.3v.

Serial communication with Arduino (3.3 vs 5v ttl)

Hi, im very new to the Spark Core (im very familiar with Arduino and similar boards). I want to be able to connect my Spark Core to an Arduino board via Serial so that I can send commands between them but there is the issue of the voltage difference (3.3V vs 5V). Is it possible (and safe for the spark core) to connect the D0 and D1 pins, which are 5V tolerant (using serial2) to the Arduino TX and RX pins in order to send commands between each other. If not, what is the best way of connecting …