ESP8266 WIFI 4CH Relay Module 12V + ESP8266

ESP8266 WIFI 4CH Relay Module 12V + ESP8266 The ESP8266 is the name of a micro controller designed by Espressif Systems. The ESP8266 itself is a self-contained WiFi networking solution offering as a bridge from existing micro controller to WiFi and is also capable of running self-contained applications. Interface and sources: IN+, IN-: 5V power input TX, RX: UART communication SWIM, NRST: MCU program interface S1: Mode selection key, default is mode 1 S2: Restore key LED D2 and D4(red): Relay indicator LED D7(red): Mode 1 indicator LED D5(blue): Mode 2 indicator LED D6(green): Working state indicator, the description of D6 as below: (1) It means internal self-configuration or lost connection with the router when D6 off (2) It means the ESP-01 is waiting for the APP configure the password for it when D6 fast blinks every 0.5S (3) It means the whole configuration is done and waiting to establish TCP connection with APP when D6 slow blinks every 2S (4) It means the TCP connection between ESP-01 and APP is OK when D6 is on all the time. Relay control command(must be in hex format): Open the first relay: A0 01 01 A2 Close the first Relay: A0 01 00 A1 Open the second relay: A0 02 01 A3 Close the second Relay: A0 02 00 A2 Package Includes: 1x ESP8266 WIFI 4CH Relay Module 12V + ESP8266 Relate Products: Sensors | Modules