D1 Mini ESP8266 Development Board

Overview

This mini development board is based on ESP-8266EX chip and is useful for applications that need wireless data transmission.

It is compatible with Arduino IDE and NodeMCU firmware. It features 11 digital input/output pins, all pins supports interrupt/PWM/I2C/one-wire (except D0) and 1 analog input with 3.3V maximum input.

With this product, you can build innovative projects like you can control lights or appliances in the house.

Specifications

• Chip: ESP-8266EX
• Compatible with Arduino IDE
• Compatible NodeMCU firmware
• GPIO pins: 11
• 1 pin ADC (0 V to 3.3 V)
• Operating Frequency: 80 / 160 MHz
• Flash Memory: 4MB
• I2C interface
• Size: 34.2 x 25.6 mm

How to use

The D1 Mini board is not included in the Arduino IDE Environment and needs to be added. You can add the board as follows:

1. Open Arduino IDE.
2. Go to FILE > PREFERENCES.
3. Copy the following link and add it to "Additional Boards Manager URLs" : http://arduino.esp8266.com/stable/package_esp8266com_index.json
4. Go to TOOLS > BOARDS > BOARDS MANAGER. 
5. Download and install ESP8266.
6. Restart Arduino IDE.

IMPORTANT!!! If you your operating system is Windows or MAC OS, you need to install the CH340G driver that can be found in the DOWNLOAD section of this page

Before uploading the code you need to select the D1 Mini board. Go to  TOOLS > BOARD and select LOLIN(WEMOS) D1 R2 & Mini.  

Configuration settings are:

• CPU Frequency: 80 MHz;
• Flash Size: 4 M ( 3 M SPIFFS );
• Upload Size: 921600

To test the board, you can upload an example. You can choose a generic one, like BLINK from FILE > EXAMPLES > BASICS, or a more complex one, like ESP8266WIFI > WiFi SCAN.

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