RM-4-ESP 4-Channel Relay Module with ESP8266, 5V

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4-Channel Relay Module with WiFi - ESP8266, 5V

This is a four channel WiFi module equipped with an ESP-01 WiFi module (8 bit MCU). This MCU is capable of controlling each relay individually at any time with some simple coding. By using a WiFi relay phone application, the user could control the relays from anywhere in the world as long there is Internet connectivety! 





1. On board high quality MCU and ESP-01WIFI module
2. Two working mode:
Mode 1: cellphone carry on wifi module directly
Mode 2: cellphone and wifi module carry on router together
Additional function: ESP-01 works as a microcontroller when disconnected from the relay module
3. Transmission distance:
(1) In the open environment, the mobile phone when carrying on the WIFI module maximum transmission distance of 100 m;
(2) When the WiFI module and cell phone carrying on the router at the same time the signal transmission distance depends on router signal
4. Use the Smartconfig technology to complete the configuration of the account and password of the esp-01 WIFI module on the mobile APP. The configured account and password will be memorized after power off
5. Power:
Logic: 5V, Relays: 10A/250VAC OR 10A/30VDC, Cycles:100,000 times - protection diode for short and fast response time.

6. With mode option and working statue LED indicator
7. With 4 isolator and strong anti interference ability
8. Reserved UART debug interface and MCU download port for program
9. Board size: 60*63mm

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 1
Button S2: reset

LED 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 successfully
Control command for relay(hex format):
Open relay 1: A0 01 01 A2
Close relay 1: A0 01 00 A1
Open relay 2: A0 02 01 A3
Close relay 2: A0 02 00 A2
Open relay 3: A0 03 01 A4
Close relay 3: A0 03 00 A3
Open relay 4: A0 04 01 A5
Close relay 4: A0 04 00 A4


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