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Development board

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AC/DC power ESP8266 WIFI single relay ESP-12F Dev board

SKU :LC-Relay-ESP12-1R-MV

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.
The function characteristics
1.Onboard Mature and stable ESP-12F WiFi module, high capacity 4M Byte Flash
2. The I/O port of the WiFi module and the UART program download port are all extracted, convenient secondary development
3.Onboard AC-DC switch power module,supply power way support AC90-250V/DC7-12V/USB5V
4. Onboard  Wifi module RST reset button
5.ESP-12F support use Eclipse/Arduino IDE etc.development tools, provide Arduino development environment reference program
6.Onboard 1 channel 5V relay,output switch signal ,Suitable for controlling and controlling the working voltage to be within the load of AC 250V/DC30V.

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

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 

NO. Name Function NO. Name Function
1 GND Power ground 13 IO10 GPIO10
2 Relay Relay drive port , using IO5 drive by default. If need use other I/O drive relay,  please remove R14, then use the I/O connected to this relay pin. 14 MISO Slave output master input
 
3 IO2 GPIO2; UART1_TXD 15 IO13 GPIO13; HSPI_MOSI; UART0_CTS
4 IO4 GPIO4 16 IO14 GPIO14; HSPI_CLK
5 RX UART0_RXD; GPIO3 17 ADC A/D Conversion result. Input voltage range 0~1V, ranging from 0 to 1024
6 3V3 3.3V power 18 3V3 3.3V power
7 SCLK CLOCK 19 MOSI Master output Slave input
8 IO15 GPIO15; MTDO; HSPICS; UART0_RTS 20 IO9 GPIO9
9 IO0 GPIO0 21 CS0 chip select
10 IO5 GPIO5 22 IO12 GPIO12; HSPI_MISO
11 TX UART0_TXD; GPIO1 23 IO16 GPIO16
12 5V 5V power 24 GND Power ground

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:

TTL serial module ESP8266 development board
GND GND
TX RX
RX TX
5V 5V

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.