D1 Mini V3 Nodemcu with ESP8266-12F WLAN module

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Product Link

D1 Mini V3 Nodemcu with ESP8266-12F WLAN moduleOpenELAB

Introduction

The WeMos D1 Mini is an inexpensive ESP8266-based WiFi board that is low-profile but just as powerful as any NodeMCU or ESP8266-based microcontroller. The D1 Mini is incredibly versatile because it is inexpensive, WiFi-enabled, and fully compatible with the Arduino platform. In this tutorial, the ESP8266 library and board manager will be introduced in order to get the D1 Mini acting as an Arduino board. Then, a simple web page will be introduced with the intention of harnessing the WiFi capabilities of the module. The D1 Mini will act as a web server, allowing any WiFi-connected device to interact with the board and control its pins wirelessly.

Features

• 11 digital IO, interrupt/pwm/I2C/one-wire supported(except D0)

• 1 analog input(3.2V max input)

• a Micro USB connection

• Compatible with MicroPython, Arduino, nodemcu

Pinout

Pin	Function	ESP-8266 Pin
TX	TXD	TXD
RX	RXD	RXD
A0	Analog input, max 3.2V	A0
D0	IO	GPIO16
D1	IO, SCL	GPIO5
D2	IO, SDA	GPIO4
D3	IO, 10k Pull-up	GPIO0
D4	IO, 10k Pull-up, BUILTIN_LED	GPIO2
D5	IO, SCK	GPIO14
D6	IO, MISO	GPIO12
D7	IO, MOSI	GPIO13
D8	IO, 10k Pull-down, SS	GPIO15
G	Ground	GND
5V	5V	-
3V3	3.3V	3.3V
RST	Reset	RST

Technical specs

Operating Voltage	3.3V
Digital I/O Pins	11
Analog Input Pins	1(3.2V Max)
Clock Speed	80/160MHz
Flash	4M Bytes
Size	34.2*25.6mm
Weight	3g

How to Use

How to flash your Code on the ESP8266 WeMos D1 Mini

You can create your program script with the Arduino IDE and use the Arduino IDE to flash your code to the ESP8266 WeMos D1 Mini. There is only a small change in the Arduino IDE that is described in the following steps:

• In the Arduino IDE menu click on File → Preferences

• Insert the following URL in the field “Additional Boards Manager URLs:”: http://arduino.esp8266.com/stable/package_esp8266com_index.json

The following picture shows the result in the preferences menu.

The second step is to install the necessary packages for the ESP8266 module:

• Click in the Arduino IDE on Tools → Board → Board Manager.

• Now search for NodeMCU or ESP8266 and you will find the esp8266 by ESP8266 Community. Install the latest version of the board.

After the installation you can select the ESP8266 WeMos D1 Mini that has the name “LOLIN(WEMOS) D1 R2 & mini” under Tools → Board.