Hi-Link HLK-B20 Manual del usuario - Página 6

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P33

GND

P02

P03

P04

P05

P06

P01

P00

3. Test board description

The test board is mainly used to test the data transmission function of the HLK-B20's Bluetooth and

serial ports.

RST

USB to serial

port

ES0

3.1. Restore factory settings

To ensure that all configuration procedures are correct, first reset the module to factory settings.

Modules that are already in factory mode can skip this step. Provide 5V (1000mA) power supply to

power on the module, wait for about 1 second, let the module start up. After the startup is completed,

pull down the ES0 (PIN5) pin for more than 6S. When the LED corresponding to the STA is always

on, it means that the module is restored the factory settings successfully, then release the ES0 pin,

the system will automatically restart. The system is already in factory mode after rebooting.

HLK-B20

Shenzhen Hi-Link Electronic Co., Ltd.

I/O

P33

GND

I/O

P02,SCL

I/O

P03,SDA

I/O

P04,SPI_CLK

I/O

P05,SPI_MOSI

I/O

P06,SPI_MISO

I/O

Uart1_rxd

I/O

Uart1_txd

HLK-B20 module test board

Figure 3

GPIO

GND

GPIO,I2C

GPIO,SPI

Uart1, Transparent transmission serial

port

Uart1, Transparent transmission serial

port

HLK-B20

Manual

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