------Question for PHN2MEA Please Put your question below------
Hi @jeffgniffke outside of the USB VBus, this is a 3v3 device.. The GPIO and all ports such as I2C, SPI, UART serial, etc. are not 5V tolerant.
Supplier docs: Photon 2 datasheet | Reference | Particle
Regards,
Hello,
Welcome to the DigiKey TechForum. Here is the datasheet for the development board. If you’re wondering with the input voltage this device needs to operate there are several options. Under “Interfaces” in the linked datasheet see the power section for information on these.