BLE-124: Dev Lab - Implementing the Find Me Locator

Overview

In this video we continue building our Bluetooth LE key finder application as part of a series, implementing the Bluetooth Find Me Locator role. This allows the device to find other key finders and trigger alerts on them.

We extend the application to operate in central mode, scanning for nearby devices, connecting to them, and interacting with their GATT services. Following the Find Me profile, the device discovers the Immediate Alert Service and writes to the Alert Level characteristic to trigger alerts on remote devices.

To support this behavior we expand the application’s state machine to handle scanning, connecting, service discovery, and writing, along with handling errors during the process.

By the end of this video your device can operate in both Target and Locator roles, enabling peer-to-peer interaction between key finders.

Further Information:

• GitHub - Silicon Labs Training Examples
• Zephyr Project - Getting Started Guide
• Silicon Labs - Simplicity SDK for Zephyr Getting Started
• Bluetooth SIG - Find Me Profile
• Bluetooth SIG - Immediate Alert Service
• Bluetooth SIG - GATT Specification Supplement
• Zephyr Project - GAP APIs
• Zephyr Project - GATT
• Zephyr Project - GATT APIs
• Zephyr Project - GATT Client APIs