1PCS TypeC USB Relay Module USB Intelligent Control Switch Serial Port Relay
4,51 €
Step 2: open the serial port debugging software such as STC-ISP and SSCOM32, select the baud rate of 9600, send A0 01 01 A2 in hexadecimal (HEX) to open the relay, and send A0 01 00 A1 in hexadecimal (HEX) to close the relay.
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