• Digispark
• Rotary Encoder ; e.g WayinTop KY-040

My rotary encoder has an active low switch which is pulled up by an 10k ohm resistor. Together with the build in led (connected also to pin 1) the Digispark detect always a low, doesn't matter the switch is pressed or not.

Here are two solutions:

• Replace the 10k ohm pull up switch resistor with a 1.5k ohm resistor on rotary encoder
• Desolder build in led on the digispark

• VS-Code + Platformio Extension

git clone https://github.com/fixItFab/KeyBoardLight.git

TrinketHidCombo is not available on the platformio libraries. So we have to download the TrinketHidCombo library manually.

TLDR:

curl -s -L -o trinket-usb.zip https://github.com/adafruit/Adafruit-Trinket-USB/archive/master.zip && unzip trinket-usb.zip && cp -R ./Adafruit-Trinket-USB-master/TrinketHidCombo ./lib/ && rm -rf ./trinket-usb.zip ./Adafruit-Trinket-USB-master ./lib/TrinketHidCombo/usbdrv/usbdrvasm.asm

1. Download TrinketHidCombo Library from Github
2. Unzip it
3. Copy only the TrinketHidCombo folder to your lib folder
4. The file TrinketHidCombo/TrinketHidCombousbdrv/usbdrvasm.asm maybe make trouble processing compiling & flashing. In short, delete the file, we don't need it! :)
5. clean up downloaded & unziped files

Now, you can start flashing.

First start the flash process and when the console print Uploading .pio/build/digispark-tiny/firmware.hex, plug the Digispark into the USB port

After flashing, the Digisparks reboot and after a few seconds, the DialTail is ready to use.