Bluetooth Low Energy (aka BLE/Bluetooth 4.0/Bluetooth Smart) is the most recent incarnation of Bluetooth technology developed by the Bluetooth SIG (the organization that maintains the specification). This communication protocol is designed for applications where data needs to be transferred in small amounts at relatively low speed while consuming low amounts of power (e.g., heart rate monitor, step counter, wireless keyboard). This latest version of the protocol is not compatible with its predecessor (Bluetooth classic), as an upside, long gone are the days where pairing devices was necessary!
The goal of this Instructable is to demonstrate how you can setup your Raspberry Pi to control RGB LEDs from a Bluetooth Low Energy (BLE) device nearby. Specifically, we’ll be using the RFduino microcontroller, which has a built-in BLE module. We’ll easily program the microcontroller to listen to messages sent by the Pi and control the LED color accordingly.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
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.