DollaTek 5V ESP8266 Four Channel WiFi Relay IOT Smart Home Cellphone APP Remote Control

Specifications:Board size ：60*63mmInterface on board ：IN+、IN-：5V voltage input ；5V、GND、TX、RX：UART serial port PIN ；SWIM、PIN8、NRST：reserved MCU download port 。Button S1：change mode ，default mode is mode 1Button S2：resetLED D1/D2/D3/D4（red ）：relay working LED，LED on when relay is onLED D7（red ）：indicator for mode 1LED D5（blue）：indicator for mode 2LED D6（green ）：work statue indicator ，exact details as below ：(1)When extinguished, it is being configured or disconnected from the router.(2)0.5s fast blinking represents cellphone app is configuring WIFI account and password for ESP-01 module(3) 2S slow blinking to configure finished ,and wait for connection with cellphone by TCP(4)LED always on represents TCP connections with mobile phone successfullyConnection for reserved two cap jumper :Generally ,insert them to bottom ,that is RX to RX1,TX to TX1 rt them to upper ,when use it as USB moduleCOM1 COM2 COM3 COM4 ：Common terminal ；NC1 NC2 NC3 NC4 ：normal closeNO1 NO2 NO3 NO4 ：normal openControl command for relay （hex format ）：Open relay 1 ：A0 01 01 A2Close relay 1 ：A0 01 00 A1Open relay 2 ：A0 02 01 A3Close relay 2：A0 02 00 A2Open relay 3 ：A0 03 01 A4Close relay 3 ：A0 03 00 A3Open relay 4 ：A0 04 01 A5Close relay 4 ：A0 04 00 A4Package Included:1x 5V ESP8266 Four Channel Wifi Relay IOT Smart Home Cellphone APP Remote Control Tips: All of the following are used to control the first 2 relay in the mobile phone APP. The third and fourth way are the same, except that the relay control instructions are different.