Adafruit Learning System

Bluetooth Restroom Key Proximity Tracker

A system to wirelessly track and prevent the theft of restroom keys using CircuitPython, the Feather nRF52840 Express, an I2S amp, wireless charging and Bluetooth BLE beacons.

A CircuitPython BLE Remote Control On/Off Switch

By rdagger

This CircuitPython tutorial demonstrates how to build a battery powered Bluetooth BLE remote control to operate a BLE peripheral hosting a solenoid and a spectrally selective light detector. Two Adafruit Feather nRF52840 Express boards will be used for the BLE client and server.

Getting Started

Adafruit Playground is a wonderful and safe place to share your interests with Adafruit's vibrant community of makers and doers. Have a cool project you are working on? Have a bit of code that you think others will find useful? Want to show off your electronics workbench? You have come to the right place.

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