These files are for use with the SD Hex Loader ISP board. See the SD Hex Loader ISP instructable for a detailed description of this project. Launch both the Arduino IDE and the HexLoaderUtility ...

It looked like the best bet was to do Intel hex files and transfer them copy and paste across the terminal. I wanted better, and that sent me down a Saturday morning rabbit hole.

Converting from PlatformIO to Arduino IDE: create main folder in your Arduino IDE project folder copy partitions.csv file and src, lib and data folders from PlatformIO project into main flatten all ...