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Ant's
Asked: 2012-05-16 19:14:06 +0800 CST

What does this mean "You don't have permissions for /dev/ttyACM1 device!"?

  • 772

I have been trying to connect my Nokia E65 phone to my Ubuntu 12.04 via wammu. I tried the option of "Automatically Search The Phone". But I get the error messages like this in the screen: 

Wammu is now searching for phone:
You don't have permissions for /dev/ttyS0 device!
You don't have permissions for /dev/ttyS1 device!
You don't have permissions for /dev/ttyS2 device!
You don't have permissions for /dev/ttyS3 device!
You don't have permissions for /dev/ttyS4 device!
You don't have permissions for /dev/ttyS5 device!
You don't have permissions for /dev/ttyS6 device!
You don't have permissions for /dev/ttyS7 device!
You don't have permissions for /dev/ttyS8 device!
You don't have permissions for /dev/ttyS9 device!
You don't have permissions for /dev/ttyS10 device!
You don't have permissions for /dev/ttyS11 device!
You don't have permissions for /dev/ttyS12 device!
You don't have permissions for /dev/ttyS13 device!
You don't have permissions for /dev/ttyS14 device!
You don't have permissions for /dev/ttyS15 device!
You don't have permissions for /dev/ttyS16 device!
You don't have permissions for /dev/ttyS17 device!
You don't have permissions for /dev/ttyS18 device!
You don't have permissions for /dev/ttyS19 device!
You don't have permissions for /dev/ttyACM0 device!
You don't have permissions for /dev/ttyACM1 device!
Discovering Bluetooth devices using PyBluez
Could not access Bluetooth subsystem (error accessing bluetooth device)
All finished, found 0 phones
No phone has been found!

What does this mean? How to overcome this error?

Thanks in advance.

permissions 12.04

3 Answers

  1. Best Answer

    This means that your user don't have permissions to access to /dev (devices).

    Try: sudo wammu

    to gain permissions to access to devices

    Another thing you can do is to put your user in bluetooth group system

    • 5

  2. In ubuntu 12.04 all serial devices belong to the dialout group. You can quickly verify that by 

    ls -a /dev/ttyS*

    you should see something like

    crw-rw---- 1 root dialout 4, 64 May 30 18:22 /dev/ttyS0
crw-rw---- 1 root dialout 4, 65 May 30 18:22 /dev/ttyS1
crw-rw---- 1 root dialout 4, 74 May 30 18:22 /dev/ttyS10
crw-rw---- 1 root dialout 4, 75 May 30 18:22 /dev/ttyS11
crw-rw---- 1 root dialout 4, 76 May 30 18:22 /dev/ttyS12
crw-rw---- 1 root dialout 4, 77 May 30 18:22 /dev/ttyS13
crw-rw---- 1 root dialout 4, 78 May 30 18:22 /dev/ttyS14
crw-rw---- 1 root dialout 4, 79 May 30 18:22 /dev/ttyS15
crw-rw---- 1 root dialout 4, 80 May 30 18:22 /dev/ttyS16
crw-rw---- 1 root dialout 4, 81 May 30 18:22 /dev/ttyS17

    assuming your username is keith you can add yourself to that group by executing

    sudo adduser keith dialout

    restart and try again. everything should be working fine.

    • 2

  3. Change the device port permission to:

    chmod a+rw /dev/ttyXXX
    • -1