If the sketch tells a remote machine its BOARD_MAP, the map can be loaded from its file. From there, the remote machine uses it to translate between pin identifiers and integers, before sending ...

With RGBWstrandtest.ino the pin number changed to D5 and LED count to 14 (in my case) // Which pin on the Arduino is connected to the NeoPixels? // On a Trinket or Gemma we suggest changing this to 1: ...