Arduino

Installing the Arduino IDE

• https://www.arduino.cc/en/Main/Software > Download (Arduino IDE 2.3.x)

Installing a library

• https://www.arduino.cc/en/Guide/Libraries

Adding board support

• Feather Huzzah ESP8266
• Feather nRF52840 Express

Language reference

• https://www.arduino.cc/reference/en/

Using the serial plotter

• https://learn.adafruit.com/experimenters-guide-for-metro/circ08-using%20the%20arduino%20serial%20plotter

Troubleshooting

• If you get fatal error: stdint.h: No such file or directory locate and delete the folder C:\Users\USER\AppData\Local\Arduino15, then install Arduino again from the official download link above, as the Windows app store version does not yet support the nRF52840.