LC-WF-3-2

Product name

DC7-28/5V power supply ESP8266 WIFI 2-way 30A relay module ESP-12F development board secondary development

Overview

LC ESP8266 2-way 30A relay development board is equipped with ESP-12F WiFi module, all I/O ports are drawn out, and supports DC7-28V/5V power supply methods.Provide Arduino development environment reference code, suitable for ESP8266 secondary development learning, smart home wireless control and other occasions.

Function features

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

2. The I/O port of the WiFi module and the UART program download port are all drawn out, which is convenient for secondary development

3. The power supply mode supports DC7-28V/5V

4. Onboard WiFi module RST reset button and a programmable button

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

6. Onboard 2-way 5V/30A relays, output switching signals, suitable for controlling loads whose operating voltage is within AC 250V/DC30V

7. Onboard power indicator light, relay indicator light and 1 programmable LED

Description

1.Board size：83*68mm Weight：85g

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	10	IO2	GPIO2; UART1_TXD
2	EN	enable pin, default pull-up	11	IO15	GPIO15; MTDO; HSPI_CS; UART0_RTS
3	IO16	GPIO16	12	TXD	UART0_TXD;
4	IO14	GPIO14; HSPI_CLK	13	RXD	UART0_RXD; GPIO3
5	IO12	GPIO12; HSPI_MISO	14	GND	Power ground
6	IO13	GPIO13; HSPI_MOSI; UART0_CTS	15	5V	5V power supply
7	IO5	GPIO5	16	3.3V	3.3V power supply
8	IO4	GPIO4	17	RY1	The first relay drive port, you can use the short-circuit cap and IO16 to short-circuit; if you want to use other I/O to drive the relay, you can use the DuPont wire jumper
9	IO0	GPIO0	18	RY2	The second relay drive port, you can use the short-circuit cap and IO14 to short-circuit; if you want to use other I/O to drive the relay, 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.