RN42 Bluetooth Serial Bridge

Drop an RN42 module on your UART and turn any sketch’s serial output into a wireless terminal session from a phone or laptop.

Difficulty: Breadboard. Estimated build time: about 30 minutes. Estimated parts cost: about US$15.00. 5-part bill of materials with live supplier pricing. A wireless serial bridge that replaces the USB cable between your computer and your microcontroller.