1Supports TCP 01, 02, 03, 05, 06, 15 and 16 commands, and can flexibly choose different commands to access the status of relays and inputs. 2Use ESP8266 wireless module, WIFI AP / Station mode, AP mode can set password, support Poll. 3Modify the module address, WIFI network and other parameters through WIFI, with configuration tool source code (implemented by DLL call). 4The small size and light weight make the installation much more convenient, the operation is very easy as well. 5Made of high quality ABS, the shell is not easy to deform, thus very durable for long-term use. Item Type: WiFi Relay Switch Product Material: ABS Input Voltage: DC 5V Module Model: ESP8266 The IP Address of the Module AP Side: 192.168.4.1 Part of the Instruction (by default setting id = 1): Relay Pull-In: 00 00 00 00 00 09 01 10 00 00 00 01 02 01 00 Relay Release: 00 00 00 00 00 09 01 10 00 00 00 01 02 00 00 Relay Jog: 00 00 00 00 00 09 01 10 00 00 00 01 02 02 00 1 x WiFi Relay SwitchPlease connect according to the wiring diagram on the product.