USB LC Switch Standard Transmission Protocol: 9600Bps; USB LC Switch Communication Protocol: Data (1) ---- Start ID (Default: 0xA0) Data (2) ---- Switch Address Code (Default: 0x01, identified as the first switch) Data (3) ---- Operation Data (0x00 is "OFF", 0x01 is "ON") Data (4) ---- Code Verification Example: TURN ON: A0 01 01 A2 STOP: A0 01 00 A1 HOW TO USE: 1, connect the USB relay to the computer, install the CH340 on the serial port driver; 2, open STC-ISP, SSCOM32 and other serial debugging software, select the baud rate 9600, send "A0 01 01 A2" to turn on the relay in hexadecimal (hex); send "A0 01 00" in decimal (hex) "relay OFF; USB intelligent control switch. Built-in high-performance controller. USB control board CH340. Built-in power indicator and relay status indicator. Built-in 5V, 10A / 250VAC, 10A / 30VDC relay, long-term continuous pull-in 100,000 times. Relay modules with overcurrent protection and freewheeling diode protection. Color: blue Material: PCB Size: 49.6*16mm Package Contents: 1 x USB Relay Module Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.