Raspberry Arduino tyyACM0 vs tyyAMA0

[bra1nsen]

Hey Guys,

I connected my RPi4B serial via usb to my Arduino UNO.

Everything worked fine with ACM0 device. After rebooting/reconnecting/update the Port switched to AMA0 and the same setup with the same code isnt working.

Moreover I have the newest Arduino AVR Boards (1.8.5) installed and get this error while verifying:

time.tools.avr-gcc.path}/bin/, automatically converted to compiler.path=/usr/bin/. Consider upgrading this core.
Archiving built core (caching) in: /tmp/arduino_cache_516397/core/core_arduino_avr_uno_fd6415caa38f88bca13ff9c0cc535b4a.a

After compiling I get this error:

An error occurred while uploading the sketch
avrdude: ser_open(): can't open device "/dev/ttyAMA0": Device or resource busy

It's so frustrating when everything is going well and the next day you take 3 steps back on subtasks that were already done...

[Juraj]

tty as teletype

[jfjlaros]

What do you see in the system logs when you plug in the device?

I have seen 3D printer and braille software claiming devices like this, hence my question.

[bra1nsen]

unfortunalty i cant delete my post. i have no idea why, but the serial port in raspiberry config was turned off. now i have ttyS0 available, but its not syncing anymore..

[jfjlaros]

If the issue is sloved, you can just flag the post that was most helpful as the solution (in this case your own post (#4) I guess).

[bra1nsen]

finally! after 5hours i got it, damn - - only ACM0 works

[bra1nsen]

today the port randomly disappeared again. great...