Wemos D1 Mini

These are instructions to get you going on a WeMos D1 Mini.

• The Wemos D1 mini is a NodeMCU board made by wemos.cc
• It is cheap <$5!
• can be programmed using Arduino environment
• can be loaded up with MicroPython <- tricky!
• Wifi built in
• 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
• 1 analog input(3.2V max input)
• a Micro USB connection
• Compatible with Arduino
• Compatible with nodemcu
• 4 Meg flash RAM

• Loads of shields you can buy for it. https://wiki.wemos.cc/products:d1_mini_shields
  • DHT Shield
  • Battery Shield
  • Matrix LED Shield
  • Buzzer Shield
  • Dual Base
  • SHT30 Shield
  • WS2812B RGB Shield
  • ProtoBoard Shield
  • 1-Button Shield
  • Micro SD Card Shield
  • Relay Shield
  • DC Power Shield
  • Tripler Base
  • Motor Shield
  • OLED Shield

• product page: https://wiki.wemos.cc/products:d1:d1_mini
• purchase here: https://www.aliexpress.com/store/product/D1-mini-Mini-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266/1331105_32529101036.html
  • all the shields and d1 minis are on ali express. Takes a month to get from China. Some ebay sellers in USA for faster shipping.

Setup

• you need Arduino software.
• you need CH340G driver for serial usb communication
• Download and follow instructions here: https://wiki.wemos.cc/tutorials:get_started:get_started_in_arduino
• You have to set up the board using the board manager in the Arduino software.
  • enter into board manager: http://arduino.esp8266.com/versions/2.3.0/package_esp8266com_index.json or http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Choose Tools->Board->WeMos D1 Mini
• try some programs File->Example

WIFI setup

• use wifi manager to get online. https://github.com/tzapu/WiFiManager
  • Has AP captive portal! Amazing!

SHT30 Shield

• Temperature and Humidity
• Product: https://wiki.wemos.cc/products:d1_mini_shields:sht30_shield
• Code: https://github.com/wemos/WEMOS_SHT3x_Arduino_Library

OLED Shield

• 64 X 48 pixels
• Product: https://wiki.wemos.cc/products:d1_mini_shields:oled_shield
• Code: https://github.com/mcauser/Adafruit_SSD1306/tree/esp8266-64x48
• in file Adafruit_SSD1306.h (arduino libraries) make sure to have the following:
  • #define SSD1306_I2C_ADDRESS 0x3C
  • #define SSD1306_64_48

Brian's Weather Station

• in progress...
• https://github.com/bpwagner/LVL1_Weather.git
• box.svg is a lasercut box that you can make at LVL1!