Hi thanks for the good documentation / schematics / descriptions.
I've implemented the project with some success however the constant ticking gremlin is really keeping me from claiming this project successful.
My first thought was that it was a grounding issue however I've tried every conceivable combination of power and grounding options with no success.
I believe there could be an issue with the code as the ticking is dependent on the skip button as well.
On my project the ticking is constant for about 50 seconds then briefly goes away.
I've hooked up a logic analyzer to the data,busy and clock lines while connected to the radio.
Could I send this to you to have a look at and confirm my suspicion that the issue is code related?