RF-Star EFR32BG22, Manual

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EFR32BG22
www.szrfstar.com V1.6 - Jun., 2022
Shenzhen RF-star Technology Co., Ltd.
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1 Overview
1.1 Introduction
The Bluetooth LE modules which are mentioned in this document can work in bridge mode (transparent transmission
mode).
In bridge mode , user MCU can communicate with the mobile device bi-directionally through the universal serial ports
of modules. Users can also manage and control certain communication parameters through specific AT commands of
serial ports. The detailed meaning of the user data is defined by the upper applications. Mobile devices can operate the
write to the module through the APP. And the data written will be sent to the user MCU through serial ports. Then the
module will transmit the data packets from the user MCU to the mobile devices automatically. Under the development
in this mode, the user needs to undertake the code design for the MCU and the APP for mobile devices.
In order to ensure the stability of the program, the module will start to work normally after it is powered on for 600 ms .
When transmitting a big-size data packet, it is recommended to start working after the module is connected for 6 s. MTU,
connection interval, and other operations need to be confirmed when a connection is established, if the high-speed
transparent transmission is carried out at this time, packet loss or device jamming is very easy to occur.
1.2 Features
1. Easy to use, no need for any application experience of Bluetooth protocol stack.
2. Support all features of BLE 5.0: 2M PHY, Long Range broadcast, Extended broadcast. Modules based on
EFR32BG22C112 don’t support Long Range broadcast.
3. Support BLE master mode, slave mode, master-slave mode, and Beacon mode.
4. Support concurrent slave and master roles, that is, the module can connect to other slave devices when it is
connected by one master device (master-slave mode).
5. Support multi-connection during master mode and master-slave mode. Up to 8 slave devices can be connected
concurrently under master mode. Under master-slave mode, 7 slave devices can be connected concurrently, and
it also can be connected as a slave by another master device at the same time.
6. Default connection interval of 20 ms, which makes quick connections and enhances the compatible stability of
Android and iOS phones.
7. Universal serial port design for user interface, full-duplex bi-directional communication, and support the minimum
baud rate of 1200 bps and the maximum baud rate of 921600 bps.
8. Support software reset module by AT command.
9. Support acquire and modify the MAC address (take effect after resetting) by AT command.
10. Support modify the Bluetooth connection interval and control different transmit rates (dynamic power consumption