This article based on Arduino source codes and toolchain for WiFi_Kit_series made by HelTecAutomation. Visit this github link https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series.

Tested on 32 and 64 bit Windows 10 machines

1. Download and install the latest Arduino IDE Windows Installer from arduino.cc
2. Download and install Git from git-scm.com

• If you don’t install Git,you choose dowload zip from the home page and Unzip the file to /Documents/Arduino/hardware/heltec ,Skip steps three to step four

3. Execute the command under the \Documents\Arduino\hardware path Start Git Bash and run through the following steps:
   • Input git clone https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series.git heltec
4. Open /Documents/Arduino/hardware/heltec/esp32/tools and double-click get.exe
5. When get.exe finishes, you should see the following files in the directory
6. Plug your ESP32 board and wait for the drivers to install (or install manually any that might be required)
7. Start Arduino IDE
8. Select your board in Tools > Board menu WiFi_Kit_32or WiFi_LoRa_32
9. Select the COM port that the board is attached to
10. Compile and upload (You might need to hold the PRG button while uploading)

How to update to the latest code

1. Open /Documents/Arduino/hardware/heltec created start Git Bash and input git pull!
2. Wait for git to pull any changes and close Git Bash
3. Open /Documents/Arduino/hardware/heltec/esp32/tools and double-click get.exe

Installation instructions for Debian / Ubuntu OS

• Install latest Arduino IDE from arduino.cc
• Open Terminal and execute the following command (copy->paste and hit enter):

  sudo usermod -a -G dialout $USER && \
  sudo apt-get install git && \
  wget https://bootstrap.pypa.io/get-pip.py && \
  sudo python get-pip.py && \
  sudo pip install pyserial && \
  mkdir -p ~/Arduino/hardware && \
  cd ~/Arduino/hardware && \
  git clone https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series.git heltec && \
  cd heltec/esp32 && \
  git submodule update --init --recursive && \
  cd tools && \
  python get.py && \
  cd ~/Arduino/hardware/heltec/esp8266 && \
  git submodule update --init --recursive && \
  cd tools && \
  python get.py

• Restart Arduino IDE
• If you have Arduino.app installed to /Applications/, modify the installation as follows, beginning at mkdir -p ~/Arduino...:

  cd /Applications/Arduino_*/Contents/java/
  mkdir -p hardware && \
  cd hardware && \
  git clone https://github.com/Heltec-Aaron-Lee/WiFi_Kit_series.git heltec && \
  cd heltec/esp32 && \
  git submodule update --init --recursive && \
  cd tools && \
  python get.py && \
  cd /Applications/Arduino_*/Contents/java/hardware/heltec/esp8266 && \
  git submodule update --init --recursive && \
  cd tools && \
  python get.py

Read this Article for NodeMCU Arduino Support

Arduino Support for ESP8266 with simple test code