I am trying to access a serial device, which is attached as: "/dev/ttyUSB0".
crw-rw---- 1 root dialout 188, 0 Nov 29 15:45 ttyUSB0 For that I created a new udev rule:
SUBSYSTEM=="tty", ATTR{idVendor}=="1a86", ATTR{idProduct}=="7523", SYMLINK+="ttyPWM0", MODE="0666" So I get the following file:
lrwxrwxrwx 1 root root 7 Nov 29 15:45 ttyPWM0 -> ttyUSB0 If I try to access it with echo, I get the following message. The same problem is with sudo:
$echo "hello" >> ttyPWM0 bash: ttyPWM0: Permission denied My Question is: how can I access this file as normal user? I need to run a program with access granted to it. I don't to add my account to dialout, because I know there is a way without doing this security hole.
I have a device of SalaeLogic. For this device, there is a script:
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="0925", ATTR{idProduct}=="3881", MODE="0666" SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="21a9", ATTR{idProduct}=="1001", MODE="0666" SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="21a9", ATTR{idProduct}=="1003", MODE="0666" SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="21a9", ATTR{idProduct}=="1004", MODE="0666" SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="21a9", ATTR{idProduct}=="1005", MODE="0666" SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="21a9", ATTR{idProduct}=="1006", MODE="0666" With this rule(s), I can start the program and access the device without any other action needed. The same I would like to achieve.... but how?
