Use the Arduino IDE
Wemos matrix LED shield
Wemos D1 mini as a Wifi webserver

• Goto Get started in Arduino and follow the instructions
  • Installing Hardware package. Goto Arduino on Github
  • Click on the green Clone or Download button
  • Click on Download ZIP and download Arduino-master.zip
  • Copy Arduino-master.zip to /opt
  • Become root and do
    • cd /opt
    • unzip Arduino-master.zip
  • cd Arduino-master
  • less README.md
    • Goto the line ### Installing with Boards Manage and follow the instructions:
    • Start the Arduino IDE
    • Goto File | Preferences
    • Enter into the *Additional Board Manager URLs* field.Do https://arduino.esp8266.com/stable/package_esp8266com_index.json Do not enter the quotes noted in the README.md file. (The string to enter starts with https and ends with json). If there is already a string or more use comma's to separate them, do not use spaces * Goto Tools | Board: [whatever follows] | Boards Manager… * Install *esp8266* platform * In the Arduino IDE select the right ESP8266 board from Tools | Board: [whatever follows] | Boardslist . In our case we select LOLIN(WEMOS) D1 R1 &mini**

• Load blink from the examples
  • Make sure the LED_BUILDIN declaration is used. The LED is not on pin 13 as on the Arduino UNO!
• Upload the sketch
• The blue LED should blink now

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