This tutorial builds a remote Bluetooth low energy switch, attached to the front of a server, which can be turned on or off remotely. The peripheral will also wirelessly report whether the server is on or off.
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.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.