LC-WF-3-4

Product name

AC/DC power suppply ESP8266 WIFI 4-way relay module ESP-12F development board secondary development.

Overview

LC ESP8266 4-way relay development board is equipped with ESP-12F WiFi module, all I/O ports are drawn out, and supports various power supply methods such as AC90-250V/DC7-30V/5V.
Provide Arduino development environment reference code, suitable for ESP8266 secondary development learning, smart home wireless control and other occasions.

Feature

• Onboard mature and stable ESP-12F WiFi module, large capacity 4M Byte Flash
  

• The I/O port of the WiFi module and the UART program download port are all exported to facilitate secondary development
  

• Onboard AC-DC switching power supply module, power supply mode supports AC90-250V/DC7-30V/5V
  

• Onboard WiFi module RST reset button
  

• ESP-12F supports the use of development tools such as Eclipse/Arduino IDE, and provides reference programs in the Arduino development environment
  

• On-board 4-way 5V relay, output switching signal, suitable for controlling loads whose operating voltage is within AC 250V/DC30V
  

• Onboard power indicator, 1 programmable LED and relay indicator
  

Description for interface

1.Board size：93*87mm Weight：90g

2.Introduce for interface

Programming port: GND, RX, TX, 5V of ESP8266 are respectively connected to GND, TX, RX, 5V of the external TTL serial port module. When downloading, IO0 needs to be connected to GND. After the download is completed, disconnect the connection between IO0 and GND

Relay output:
NC: normally closed terminal, short-circuit with COM before the relay pulls in, and hang in the air after the pull-in
COM: public port
NO: Normally open, suspended before the relay pulls in, and short-circuited with COM after the pull-in

3. GPIO port introduction

No.	Name	Function Description	No.	Name	Function Description
1	ADC	A/D conversion result. Input voltage range 0-1V, value range 0-1024	11	IO15	GPIO15; MTDO; HSPI_CS; UART0_RTS
2	EN	enable pin, default pull-up	12	TXD	UART0_TXD; GPIO1
3	IO16	GPIO16	13	RXD	UART0_RXD; GPIO3
4	IO14	GPIO14; HSPI_CLK	14	GND	Power Ground
5	IO12	GPIO12; HSPI_MISO	15	5V	5V power supply
6	IO13	GPIO13; HSPI_MOSI; UART0_CTS	16	3.3V	3.3V power supply
7	IO5	GPIO5	17	RY1	A relay drive port, which can be short-circuited with IO16 using a short-circuit cap; if you want to use other I/O drive relays, you can use a DuPont wire jumper
8	IO4	GPIO4	18	RY2	One relay drive port, which can be short-circuited with IO14 using a short-circuit cap; if you want to use other I/O drive relays, you can use a Dupont wire jumper
9	IO0	GPIO0	19	RY3	A relay drive port, you can use a short cap and IO12 to short-circuit; if you want to use other I/O drive relays, you can use a DuPont wire jumper
10	IO2	GPIO2; UART1_TXD	20	RY4	A relay drive port, which can be short-circuited with IO13 using a short-circuit cap; if you want to use other I/O drive relays, you can use a DuPont wire jumper

Description for connection

Arduino development environment setup:
ESP8266 supports Eclipse/Arduino IDE and other development tools. It is relatively simple to use Arduino. The following is how to build the Arduino development environment:
1. Install Arduino IDE 1.8.9 or the latest version;
2. Open the Arduino IDE, click File--Preferences in the menu bar, enter the preferences and click Add Network in the "Additional Development Board Manager URL"
http://arduino.esp8266.com/stable/package_esp8266com_index.json

3. Click Tools--Development Board--Development Board Manager in the menu bar, and then search for "ESP8266" to install Arduino's support package for ESP8266 2.5.2 or the latest version.

Note: Since the download URL is from a foreign country, the access speed is relatively slow, and there may be download errors. Just try a few more times when the network is good.

Program download:
1. Use jumper caps to connect IO0 and GND pins, prepare a TTL serial port module (for example: FT232) and plug it into the computer USB; GND, RX, TX, 3.3V are respectively connected to GND, TX, RX, 3.3V of the external TTL serial port module V;

2. Click Tools--Development Board in the menu bar, and select the development board as ESPino (ESP-12 module);

3. Open the program to be downloaded, click Tools--Port in the menu bar and select the correct port number;

4. After clicking "Upload", the program will be automatically compiled and downloaded to the development board;

5. Finally, disconnect the connection between IO0 and GND, power on the development board again or press the reset button to run the program.