Description <br> Protocol: <br> LC USB switch default communication baud rate: 9600Bps; <br> LC USB Switch Communication Protocol: <br> Data (1)----starting identifier (default: 0xA0) <br> Data (2)----Switch address code (default: 0x01, identified as the first switch) <br> <br> Data (3)----Operation data (0x00 is OFF, 0x01 is ON) <br> Data (4)----check code <br> Example: <br> TURN ON: A0 01 01 A2 <br> TURN OFF: A0 01 00 A1 <br> HOW TO USE: <br> 1, plug the USB relay into the computer, install the CH340 to serial port chip driver; <br> 2, open STC-ISP, SSCOM32 and other serial debugging software, select the baud rate of 9600, send A0 01 01 A2 turn on relay in hexadecimal (hex) form; send A0 01 in decimal (hex) 00 AZ TURN OFF relay; <br> USB intelligent control switch. <br> Onboard high-performance micro-controller chip. <br> Board CH340 USB controller chip. <br> Onboard Power LED and relay status LED. <br> Onboard 5V, 10A / 250VAC, 10A / 30VDC relay, relay life long continuous pull 100,000 times. <br> Relay modules with overcurrent protection and freewheeling diode protection. <br> colour:blue <br> Material:PCB <br> size:49.6*16mm <br> <br> Package Contents: <br> 1 x USB relay module <br> <br> Only the above package content, other products are not included. <br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. <br>