esp-nimble-cpp/examples/NimBLE_Stream_Echo

NimBLE Stream Echo Example

This is the simplest example demonstrating NimBLEStreamServer. It echoes back any data received from BLE clients.

Features

• Minimal code showing essential NimBLE Stream usage
• Echoes all received data back to the client
• Uses default service and characteristic UUIDs
• Perfect starting point for learning the Stream interface

How it Works

1. Initializes BLE with minimal configuration
2. Creates a stream server with default UUIDs
3. Waits for client connection and data
4. Echoes received data back to the client
5. Displays received data in the ESP-IDF monitor output

Default UUIDs

• Service: 0xc0de
• Characteristic: 0xfeed

Usage

1. Build and flash this example to your ESP32 using ESP-IDF (idf.py build flash monitor)
2. Connect with a BLE client app (nRF Connect, Serial Bluetooth Terminal, etc.)
3. Find the service 0xc0de and characteristic 0xfeed
4. Subscribe to notifications
5. Write data to the characteristic
6. The data will be echoed back and displayed in idf.py monitor

Good For

• Learning the basic NimBLE Stream API
• Testing BLE connectivity
• Starting point for custom applications
• Understanding Stream read/write operations