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GR551x Software Development Kit (SDK) provides an AT-command-related example, ble_app_uart_at, to help developers quickly build a Bluetooth module and enable Bluetooth Low Energy (Bluetooth LE) communications. The example allows developers to control hardware through simple AT commands based on actual demands, freeing them up from modifying source code. AT commands feature easy extension and can be easily customized by users based on actual demands.

AT commands can be used to start/stop advertising, set advertising parameters, start/stop scanning, set scanning parameters, and get device name/address. In addition, the commands support control of devices equipped with SoCs through terminals. This makes integration of ble_app_uart_at into third-party microcontrollers possible.

This document introduces how to use and verify the ble_app_uart_at example in the GR551x SDK.

Before getting started, you can refer to the following documents.

Table 1 Reference documents
Name Description

GR551x Developer Guide

Introduces GR551x SDK and how to develop and debug applications based on the SDK.

J-Link/J-Trace User Guide

Provides J-Link operational instructions. Available at www.segger.com/downloads/jlink/UM08001_JLink.pdf.

Keil User Guide

Offers detailed Keil operational instructions. Available at www.keil.com/support/man/docs/uv4/.

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