Comment by somat
2 days ago
Boy it would be nice however.
On that note, I remember reading how some phones were able to use the headphone jack as a serial debug port, which is pretty neat.
https://wiki.postmarketos.org/wiki/Serial_debugging/Cable_sc...
The Apple 30-pin connector on the iPod and early iPhones had serial!
That is how your car radio could display the name of the current track.
https://theapplewiki.com/wiki/30-pin_Connector