Hi-Link HLK-B20 Manuale d'uso - Pagina 7

Sfoglia online o scarica il pdf Manuale d'uso per Unità di controllo Hi-Link HLK-B20. Hi-Link HLK-B20 17. Ble 4.2 wireless module

4. Function description

The module function is mainly to realize the mutual conversion of Bluetooth data and serial data.

MCU

In this mode, the BLE Bluetooth device transmits the data to the HLK-B20 module via Bluetooth, and

the HLK-B20 module sends the received data from the serial port. When the serial port gets data, the HLK-

B20 sends the serial port data from the Bluetooth terminal to realize the conversion of serial data and

Bluetooth data. When the HLK-B20 has a Bluetooth device connected, the HLK-B20 will turn off the

broadcast of the Bluetooth name, and other Bluetooth devices will no longer be able to connect to the HLK-

B20.

The module defines the working state of the serial port as two modes: transparent transmission mode

and AT command mode.

Transparent

mode

After normal power-on, the module directly enters the transparent mode. If Bluetooth is not

connected, the data will not be sent out from Bluetooth. If Bluetooth is connected, the data will be

sent out from Bluetooth. In any state, keeping the ES0 pin low for longer than Tes and less than

Trst will immediately enter the AT command mode.

HLK-B20

Shenzhen Hi-Link Electronic Co., Ltd.

HLK-B20

COM1

SERIAL

Figure 4 Serial to BLE mode

Power on

Yes

Normal configur.?

ES0(PIN5) pin

1.at+reconn=0

Figure 5 . Serial port working state transition

BLE

command

mode

Bluetooth

device

Manual

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