Hi-Link HLK-B20 User Manual - Page 12

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11. Bluetooth data transmission

Bluetooth data transmission is that after the Bluetooth connection is successful, the module will send
the data received from the Bluetooth by the serial port, and the data received from the module serial port
will be sent out by the Bluetooth.
The module Bluetooth function only supports Bluetooth 4.2.
Install the Bluetooth mobile phone test software HLK-BLE.apk, open the Bluetooth function of the
mobile phone, and then open the app, it will search for the Bluetooth name at the beginning of HLK-BLE_
on the app.
Then select the last item
HLK-B20
Shenzhen Hi-Link Electronic Co., Ltd.
Figure 9
Figure 10
Bluetooth search list
Bluetooth attribute list
Manual
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