Product Details

Overview：
The 5V ESP8266 dual WIFI relay module uses the ESP8266 chip. It only needs a simple configuration process to realize the wireless control of the 2 relays in the local area network using the mobile phone APP.
Features：
1. Onboard ESP8266 chip;
2. The module has 2 working modes:
Mode 1: The mobile phone is directly mounted on the ESP8266 chip;
Mode 2: The mobile phone and the ESP8266 chip are mounted on the router at the same time;
Transmission distance:
(1) In an open environment, when the mobile phone is mounted on the ESP8266 chip, the maximum stable transmission distance is 100m;
(2) When the ESP8266 chip and the mobile phone are mounted on the router at the same time, the transmission distance depends on the signal strength of the router.
4. Use Smartconfig technology to complete the configuration of the ESP8266 chip account and password on the mobile APP. The configured account and password have the power-off memory function;
5. Onboard 5V, 10A/250V AC 10A/30V DC relay, which can be activated continuously for 100,000 times, has diode effusion protection, and has a short response time;
6. On-board mode selection indicator;
7. Reserve the ESP8266 chip program download interface.
Hardware introduction：
Board size: 42.8*62.4mm
Weight: 30g
Board function description:
1. Introduction of onboard resources:
IN+, IN-: 5V power input;
5V, TX, RX, GND, IO0: program download interface;
Button S1: Short press the mode switch, long press 2S to clear the password
Button S2: Reset button
LED D4 and D5 (red light): Relay working indicator, light up when it is turned on
LED D2 (red light): power indicator
LED D1 (green light): Mode indicator, described as follows:
  • Mode 1 when it is off;
  • When 1S flashes once, it means waiting for the mobile APP to configure the WIFI account and password for the ESP8266 module;
  • When it is always on, it means that the TCP connection is successfully established with the phone.
COM1: public terminal;
NC1: Normally closed, the relay is short-connected with COM1 before it is closed, and it is suspended after it is closed;
NO1: Normally open terminal, the relay is suspended before the pull-in, and short-circuited with COM1 after the pull-in.
COM2: public end;
NC2: Normally closed terminal, the relay is short-connected with COM2 before it is closed, and it is suspended after it is closed;
NO2: Normally open end, the relay is suspended before the pull-in, and short-circuited with COM2 after the pull-in
Relay control command (hexadecimal hex format):
Turn on 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
Prepare the following tools and software before use:
(1) 5V/1A power adapter, the positive and negative poles of the power supply are respectively connected to IN+ and IN- of the module;
(2) Install the APP "EspTouch_Demo" on the Android mobile phone, which is used to configure the WIFI account and password for the ESP-01 module when using the working mode 2 for the first time;
(3) Install the APP "EasyTCP_20" on the Android mobile phone, a TCP transmission tool, used to send relay control instructions, click "SWITCH", and then long press the gray square in the interface to input the name and content of the 2 relay control instructions (instruction format) It is in the form of HEX).
 
Instructions for operating mode 1 (the phone is mounted on the ESP8266 module):
(1) Power on the module as follows:
(2) At this time, the mobile phone is connected to the router first, open the "EspTouch_Demo" APP, enter the router password, and click "Confirm"
(3) Wait for the configuration to be successful. When the IP address of ESP8266 (such as 192.168.0.189) appears on the APP interface, it means that the ESP8266 module is successfully connected to the router, and the account and password are automatically memorized. The next time you enter mode 2, it will automatically connect
It should be noted that the IP address 192.168.0.189 is dynamically assigned to the ESP8266 module by the router. The address may change after the next reconnection. You can check the real-time IP address of the ESP8266 module in the device list of the router.

(4) Open the "EasyTCP_20" APP, click "CONNECT", enter the IP address of the ESP8266 module: 192.168.0.189 and port number 8080, and then click "Connect". After the connection is successful, the green light will change from slow flashing for 1 second to constant light. Click on the gray square to send instructions to control the switch of the relay
 
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