ls: cannot access /dev/ttyACM0: No such file or directory

hokuyo_node

asked 2012-08-08 15:10:20 -0500

286 ●31 ●39 ●46 http://www.sites.mech....

Hi, I have installed the Hokuyo UTM-30LX driver as followed by http://www.isep.ipp.pt/roswiki/hokuyo_node%282f%29Tutorials%282f%29UsingTheHokuyoNode.html. And then I typed $ls -l /dev/ttyACM0 in the terminal, but it displayed that ls: cannot access /dev/ttyACM0: No such file or directory. Why? Any help is appreciated!!!

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answered 2012-08-08 23:08:20 -0500

dornhege

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There is no device. Is it plugged in and powered up properly?

The device might also be any like /dev/ttyACM*.

Are there any error messages when you type dmesg? To check what is relevant, unplug the device, dmesg, replug it, dmesg, and see what changes. There should be either some messages reported the new device (also giving the device) or error messages.

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answered 2013-12-16 07:38:53 -0500

Lili Meng

286 ●31 ●39 ●46 http://www.sites.mech....

Hi all. Thank you for your advice! I have solved the problem by following: http://mirror.umd.edu/roswiki/hokuyo_node%282f%29Tutorials%282f%29UsingTheHokuyoNode.html

I think the main problem is that the port permission is denied, and we could get access by typing the

$ sudo chmod a+rw /dev/ttyACM0

to get access.

Hopefully it also works to you guys:)

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This doesn't solve the original problem. If it was a permission problem you would have seen an error message similar to: Permission denied, not No such file or directory.

dornhege ( 2013-12-16 07:40:53 -0500 )edit

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ls: cannot access /dev/ttyACM0: No such file or directory

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