CP-102: Dev Lab - CircuitPython Bluetooth Find Me

Overview

This project-based Dev Lab steps through the creation of a Bluetooth Find Me device using CircuitPython on the Silicon Labs EFR32MG24 secure, connected, microcontroller. The completed software operates as a key finder type device playing alert tunes using a passive piezo buzzer when activated. Activation can be triggered from a mobile phone using the EFR Connect application or by pressing a button on another Find Me device. The device operates in both target and locator modes as defined by the Bluetooth SIG Find Me Profile. 

In this Dev Lab you will learn: 

• How to drive LEDs, buttons and play tunes on a piezo buzzer
• How to create a Bluetooth Find Me device that operates in the Target role
• How to add the Locator role to the Bluetooth Find Me device

Resources:

• GitHub repository with source code and wiring diagrams 
• CircuitPython binaries for Silicon Labs boards 
• CircuitPython library bundle
• EFR Connect Bluetooth mobile application
  
• Silicon Labs Bluetooth solutions

Boards used in this video:

• xG24 Explorer Kit
  
• xG24 Dev Kit
• SparkFun MGM240P Thing Plus

Bluetooth specifications used in the this video:

• Find Me Profile Specification
• Immediate Alert Service Specification
• GATT Specification Supplement (Alert Level characteristic) 

Ring Tone Text Transfer Language (RTTTL) information:

• RTTTL Specification 
• RTTTL Tunes 
• RTTTL Online Player