BLE peripheral Example

Source code path: example/ble/peripheral

Supported Platforms

All platforms

This example demonstrates how to implement GAP peripheral and GATT server functionality on this platform.

When operating as a slave device, the board starts advertising upon boot with the name SIFLI_APP-xx-xx-xx-xx-xx-xx, where xx represents the Bluetooth address of the device. It can be connected via BLE apps on mobile phones.
When operating as a GATT server, write and read operations can be performed from the mobile client, or by enabling CCCD, the device will update the characteristic value every second.

Before running this example, prepare:

Enable Bluetooth (BLUETOOTH):
- Path: Sifli middleware → Bluetooth
- Enable: Enable bluetooth
  - Macro switch: CONFIG_BLUETOOTH
  - Description: Enable Bluetooth functionality
Enable GAP, GATT Client, BLE connection manager:
- Path: Sifli middleware → Bluetooth → Bluetooth service → BLE service
- Enable: Enable BLE GAP central role
  - Macro switch: CONFIG_BLE_GAP_CENTRAL
  - Description: Switch for BLE CENTRAL (central device). When enabled, it provides scanning and active connection initiation with peripherals.
- Enable: Enable BLE GATT client
  - Macro switch: CONFIG_BLE_GATT_CLIENT
  - Description: Switch for GATT CLIENT. When enabled, it can actively search and discover services, read/write data, and receive notifications.
- Enable: Enable BLE connection manager
  - Macro switch: CONFIG_BSP_BLE_CONNECTION_MANAGER
  - Description: Provides BLE connection control management, including multi-connection management, BLE pairing, link connection parameter updates, etc.
Enable NVDS:
- Path: Sifli middleware → Bluetooth → Bluetooth service → Common service
- Enable: Enable NVDS synchronous
  - Macro switch: CONFIG_BSP_BLE_NVDS_SYNC
  - Description: Bluetooth NVDS synchronization. When Bluetooth is configured to HCPU, BLE NVDS can be accessed synchronously, so enable this option; when Bluetooth is configured to LCPU, this option needs to be disabled.

Switch to the example project directory and run the scons command to compile:

> scons --board=eh-lb525 -j32

Switch to the example project/build_xx directory and run uart_download.bat, then select the port as prompted to download:

$ ./uart_download.bat

     Uart Download

please input the serial port num:5

For detailed compilation and download steps, please refer to the Quick Start Guide.

After the example starts:

It can be discovered and connected by mobile BLE apps, allowing corresponding GATT characteristic value read/write operations.