Serial device not added correctly

[kste]

Ah I see!

You plug in your GPS into the OPv3 system and it does not appear in the Serial app is that correct? You plug it directly into a USB port on the pi I assume.

What do you see if you use the commands :

Code:

dmesg | grep ttyACM0   and   dmesg | grep blox

after you plug the GPS in? Assuming it is your u-blox GPS you're using

it's two rpi4, the one with op3 is remote in the boat. if I type lsusb the gps sees it

Code:

~ $ sudo lsusb
Bus 002 Device 002: ID 0781:558c SanDisk Corp. Extreme Portable SSD
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 008: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 006: ID 046d:c016 Logitech, Inc. Optical Wheel Mouse
Bus 001 Device 005: ID 1546:01a7 U-Blox AG [u-blox 7]
Bus 001 Device 010: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 009: ID 0403:6015 Future Technology Devices International, Ltd Bridge(I2C/SPI/UART/FIFO)
Bus 001 Device 007: ID 0403:6015 Future Technology Devices International, Ltd Bridge(I2C/SPI/UART/FIFO)
Bus 001 Device 004: ID 0bda:5411 Realtek Semiconductor Corp. RTS5411 Hub
Bus 001 Device 003: ID 0bda:5411 Realtek Semiconductor Corp. RTS5411 Hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

but if I type dmsg it doesn't see it

Code:

~ $ dmesg | grep ttyACM0   and   dmesg | grep blox
grep: and: File o directory non esistente
grep: dmesg: File o directory non esistente