RF-Star EFR32BG22, Manual

Page: 13 / 94

EFR32BG22
www.szrfstar.com V1.6 - Jun., 2022
Shenzhen RF-star Technology Co., Ltd.
Page 12 of 93
code.
9. BPS SET AFTER 2S... : The serial port baud rate has been changed and will be re-initialized after 2 seconds.
10. DEVICE ALREADY CONNECTED : The connected devices.
11. XX:XX:XX:XX:XX:XX CONNECTED Y : BLE master is successfully connected (The string in red is the MAC address
of the connected slave device).
12. XX:XX:XX:XX:XX:XX DISCONNECTED : BLE master is disconnected (The string in red is the MAC address of the
disconnected slave device).
13. XX:XX:XX:XX:XX:XX CONNECT TIMEOUT : The time when the BLE master connects to the slave device is
overtime (The string in red is the MAC address of the connected slave device). When devices are not found within
10 s after the command is run, a timeout will be prompted.
The above status can be turned on or off by the AT command “AT+STATUS”. For details, please refer to AT Command .
1.8 Multi-Connection
1. 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 device by another master device
at the same time.
2. If AT+CONNECT command failed to connect to the device, the prompt will show FAIL, please refer to the command
description for the reason.
3. Multi-connection means multiple devices automatically reconnect. When an opposite device disconnects
abnormally, the device will initiate reconnection. Please refer to the command description.
4. During multi-connection, the designated data transmission handle function is not saved after power off, and the
device will transmit data with the latest device established the connection by default. If the device with the
corresponding handle is disconnected, the handle value will be automatically switched to the first device in the
connection list. (The Handle value can be obtained from "XX:XX:XX:XX:XX:XX CONNECTED Y" in the return
message when the connection is successfully established.)
5. The user disconnects the device which is set as automatic reconnection by AT commands, and the current
automatic reconnection of the device will be failed. It will take effect after the next abnormal disconnection.