通信树莓和 Android 智能手机

Question

I tried to install Openauto on my Raspberry Pi 3b+ and everything seems to start normal. But when I connect my old Samsung Galaxy S5 (Android 6) with it, sometimes Android Auto starts to work for some seconds and the quits. Most of the time it states an error message with "Unable to open MTP device".

When I run mtp-detect from the shell this is the result:

Listing raw device(s)
Device 0 (VID=04e8 and PID=6860) is a Samsung Galaxy models (MTP).
   Found 1 device(s):
   Samsung: Galaxy models (MTP) (04e8:6860) @ bus 1, dev 47
Attempting to connect device(s)
error returned by libusb_claim_interface() = -6LIBMTP PANIC: Unable to initialize device
Unable to open raw device 0
OK.

I tried the Crankshaft Image on the Raspberry where Android Auto works without any problems. So I guess there is a configuration problem with the android smartphone and the Raspberry. Did anybody had a similar issue?

Thanks in advance!

Answer 1

The error you are getting is LIBUSB_ERROR_BUSY , in documents it states that this error code is received when the resource you are trying to access is busy. This usually happens if a program or driver has claimed the interface, meaning that 2 processes try to claim the same interface at the same time.

Try to check the processes currently running on your raspberry pi, maybe you opened multiple instances at the same time, or you are trying to use multiple programs that use the same interface.