AC/DC Power ESP8266 WiFi Single Relay Module ESP-12F Dev Boa

Overview
LC ESP8266 single relay development board onboard ESP-12F WiFi module, I/O orifice full lead ,support AC90-250V/DC7-12V/USB 5V etc. many supply power way. Provide Arduino develop environment reference code,suit for ESP8266 secondary development study, smart home wireless control.

Function features

Hardware introduction and description
1.Board  size: 80*50mm   Weight: 34g

2.Introduce of interface

1.L,N: AC90-250V power supply

2.AC90-250V turn DC5V switch power supply (when adopt AC supply power please don’t directly touch here by hand !!! )
3.VCC,GND：DC7-12V power supply
4.Micro USB：DC5V USB power supply
Mark: AC90-250V，DC7-12V，DC5V USB Choose one of the three power supply methods
5.6X6mm press button, ESP8266 reset button
6. UART Program download port: ESP8266 GND,RX,TX,5V separately connect external TTL Serial module GND，TX,RX,5V, IO0 need with GND connect when download
7.GPIO Pinout port
8.Relay output end:
NC: Normally close,the NC disconnect with COM when relay closed and connect with COM when relay released
COM: Common end  
NO: Normally open end,the NO disconnect with COM when relay released and connect with COM when relay closed
9.Power indicator LED
10.Programmable LED
11.Relay indicator LED

3.GPIO Pinout port introduce 

4.Arduino development environment building

ESP8266 support Eclipse/Arduino IDE development tools, use Arduino will easy，Arduino development environment build way as below:
(1)Install Arduino IDE 1.8.9 or latest version
(2)Open Arduino IDE ,Click on File - Preferences in the menu bar,Click on Add URL in the "Additional Development Board Manager URL" after entering the preferences:
http://arduino.esp8266.com/stable/package_esp8266com_index.json,

(3)Click menu’s tool --development board -development manager, search for "ESP8266" to install Arduino support package for ESP8266 2.5.2 or the latest version

Note: because the download website is foreign, the access speed is slow.There may be a download error,please try again when you have good internet status.

Program download:
1. Use the jumper cap to connect the IO0 and GND pins, prepare one TTL serial module(such as: FT232) plug into computer USB, serial module and development board connecting way as below:

2.click menu bar tool--development board ,choose development board for ESPino (ESP-12 module)
3. open need download program,click menu bar’s tool---interface Choose the correct port number
4.after click upload program will automatically compile and download to the development board,as below:

5. Finally cut IO0 with GND connect, the board can be powered up by pressing the power button again or by pressing the reset button.