Onboard CH340 USB Control Chip The onboard 350mA self-recovery fuse protects the computer's usb port from damage. Onboard power led indicator and relay status indicator Onboard 5V, 10A/250V AC, 30V DC relay, relay life up to 100,000 times; Module with overcurrent protection and relay diode freewheel protection The default communication baud rate is: 9600BPS; SIZE: 55*16MM HOW TO USE: 1. Insert the usb relay module into the computer and install the CH340 USB to serial port driver. 2, using STC-ISP SSCOM33 and other serial debugging software, select the baud rate of 9600BPS, send "a" in the form of characters to open the relay, send "A" in the form of characters to close the relay. You can choose to send manually or automatically.
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