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To help users rapidly understand the APIs and implement Bluetooth LE applications, GR551x SDKs provide abundant Bluetooth LE application examples:
  • Server, Client, and Broadcaster examples defined in GATT Specifications
  • Goodix-defined GATT profile examples
  • Other examples such as FreeRTOS and Apple Notification Center Service (ANCS)

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

Table 1 Reference documents
Name Description

GR551x Developer Guide

Introduces the software/hardware and quick start guide of GR551x SoCs in use.

GR551x Bluetooth Low Energy Stack User Guide

Introduces the Bluetooth Low Energy Protocol Stack supported by GR551x SoCs.

J-Link/J-Trace User Guide

Provides J-Link operational instructions. Available at

Keil User Guide

Offers detailed Keil operational instructions. Available at

Bluetooth Core Spec

Offers official Bluetooth standards and core specification from Bluetooth SIG.

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