So I’m working on a project that is pretty time sensitive and am needing to know if I can safely communicate via the TX and RX pins with an Arduino Uno to a Particle Photon. Are the Photon’s TX and RX pins 5 volt tolerant? I am needing an Arduino to send data to a Photon. Any responses would be appreciated. If this question has already been asked and answered please direct me to that thread and I will delete this one.