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ESP8266 WiFi 2 Relay Module




Product Description

LC 5V ESP8266 2-channel WIFI relay module equips with to ESP-01 WIFI module and 8 bit high-performance MCU, Only need simple configurations and then you can control the relay with cellphone APP under LAN area.


  1. On-board N76E003/STM8S003 and ESP-01 WIFI module
  2. Having two modes:
    (1) Mode 1: Cell phones carry on the wifi module directly
    (2) Mode 2: Cell phone and wifi module carry on the same router
  3. Additional function: As an USB relay module when unplug the ESP-01
  4. Transmission distance:
    (1) In the open environment, the maximum transmission distance is 100m when the cell phone carry on the wifi module directly ;
    (2) when the wifi module and cell phone carrying on the same router, the transmission distance depend on the router’s signal intensity;
  5. Use Smartconfig technology of ESP8266 to configurate the password for the
    ESP-01 module with APP
  6. On-board 5V, 10 A / 250 v AC 10 A / 30 v DC relay, absorb 100000 times continuously, Module with diode effusion protection, short response time
  7. On-board model selection and working position indicator LED
  8. On-board preserved UART debug interface and MCU program interface
  9. Size: 59*40mm

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’s means internal self-configuration or lost connection with the router when D6 off
    (2)It’s means the ESP-01 are waiting for the APP configurate the password for it when D6 fast blink every 0.5S
    (3)It’s means the whole configuration is done and waiting for establishing TCP connection with APP when D6 slow blink every 2S
    (4) It’s means the TCP connection between ESP-01 and APP is OK when D6 on all the time.
  • Relay control command(must be 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
SKU: KIT.RELAY.ESP.2 Categories: , , ,

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