LC-WF-2-24

Product name

DC12V power supply ESP8266 WIFI 24-way relay module ESP-12F development board secondary development

Overview

LC ESP8266/24-channel 10A relay development board is equipped with ESP-12F WiFi module, all I/O ports are drawn out, and supports DC5V/12V/24V power supply. 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
  

• The power supply mode supports DC5V, 12V, 24V respectively
  

• Onboard WiFi module RST reset button and a programmable button
  

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

• Onboard 24-way of 5V/10A relays, 12V/10A relays, 24V/10A relays, output switching signals, suitable for controlling loads with operating voltages within AC 250V/DC30V
  

• Onboard power indicator light, relay indicator light and 1 module with its own LED
  

• Onboard three shift registers 74HC595 control relay switch
  

Description for interface

1.Board size：165*90mm Weight：254g

2.Introduce for interface

The 24 relays are controlled by cascading three 74HC595, so the corresponding control program of 595 is needed to open and close the relay, and the reference program has been provided.
Programming port: GND, RX, TX, 3.3V of ESP8266 are respectively connected to GND, TX, RX, 3.3V 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:
COM: public port
NO: Normally open, suspended before the relay pulls in, and short-circuited with COM after the pull-in

No.	Name	Function Description	No.	Name	Function Description
1	ADC	A/D conversion result. Input voltage range 0-1V, value range 0-1024	9	IO0	GPIO0
2	EN	Enable pin, default pull-up	10	IO2	GPIO2; UART1_TXD
3	IO16	GPIO16	11	IO15	GPIO15; MTDO; HSPI_CS; UART0_RTS
4	IO14	GPIO14; HSPI_CLK	12	TXD	UART0_TXD; GPIO1
5	IO12	GPIO12; HSPI_MISO	13	RXD	UART0_RXD; GPIO3
6	IO13	GPIO13; HSPI_MOSI; UART0_CTS	14	GND	Power Ground
7	IO5	GPIO5	15	3.3V	3.3V power supply
8	IO4	GPIO4	16

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.