@camasmie as mentioned above, I’m having problems with the TX pin on both the Nano and the Xavier Dev Kits.
It seems like the Jeston are very picky. While working well with some boards they refuse to work with others.
I’m also expiriencing problems with the I2C pins. The Jetsons work with some I2C devices while refusing to detect otheres (but that’s a topic for a different thread)
My current solution is similar to yours - wire the TX/RX pins on the board im using via a USB-TTL (FTDI chip) to the Jetson USB port. Very hacky and convoluted but seems to be the only relieble solution for now.
This is my current setup:
I printed an adaprter to fix the USB-TTL board onto the Jetson USB sockets:
