Posix Configuration for RPi USB Port

PX4 Autopilot Configuration & Flight Modes ⚙️
1

I am using a UART to USB converter for the GPS module and want to connect it to USB port of Raspberry Pi 3 B+.

In Firmware/posix-configs/rpi/px4.config file which of the following configurations is correct for USB?

gps start -d /dev/ttyUSB0 –i usb –p ubx

gps start -d /dev/ttyACM0 -i uart -p ubx

2

It depends on your wiring. Please check the correct device name by executing ls /dev | grep tty.
I believe it is something like

gps start -d /dev/ttyXXXX -i uart -p ubx
3

Ok, thanks.
But if it is going to connect to USB of RPi why -i uart in the command?

4

/dev/ttyXXX is not an USB device file. Linux kernel already provides the much simpler way over USB automatically, which is UART in this case.

5

I do not understand… what do you mean by kernel already provides the much simpler way over USB automatically, which is UART in this case?