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Diagram 18
Upgrading
6. Method of restoring factory settings
Press and hold the ES0 key on the baseboard for 6 seconds to restore the factory settings.
7. Bluetooth data transmission
Bluetooth data transmission is that after the Bluetooth connection is successful, the module will
send the data received from Bluetooth through the serial port, and the data received by the module
serial port will be sent through Bluetooth.
The module Bluetooth function only supports Bluetooth 4.2.
Install the Bluetooth mobile phone test software HLK-BLE.apk, turn on the mobile phone's
Bluetooth function, and then open the app, and the Bluetooth name beginning with HLK-BLE_ will
be searched on the app.