Bad jumpers make troubleshooting very difficult.
I successfully bread boarded this projected with a Sparkfun Redboard. I happened to have to SIKs on my desk. I then transferred the wiring and code to my Trinket Pro. Only minor changes needed to be made.
- Apply power to the board
- Press the push button
- The first 3 digits of the TOTP on the left hand side of the display. The digits will display while the button is pressed. The red LED of the Trinket Pro and the colon of the LED display will turn on .
- Release the button
- This will display the second 3 digits of the TOTP on the right hand side of the display. The digits will display for 10 seconds.
The code has been added to github: TTTOTP Source