Near the connector for the keyboard ribbon cable, there is a set of three though-hole pads labeled Rx, Tx, and Gnd. Is this the debug serial port from the SoC before it is multiplexed with analog audio on the 3.5mm jack?
I don't think it's multiplexed; it's switched. But I'm pretty sure you can connect there and avoid turning off the audio output.
(04-11-2023, 06:29 PM)KC9UDX Wrote: [ -> ]I don't think it's multiplexed; it's switched. But I'm pretty sure you can connect there and avoid turning off the audio output.
Do you know if there is a lower speed limit or other limitation on the baud rate? Or the number of the UART so that I can look for this info in the SoC datasheet?
I don't think you can turn it down. But the information for it is in the wiki.