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As far as it concerns permissions, everything seems to be fine.

Something else is grabbing your serial port as soon as direwolf exits.

After stopping direwolf, try:

$ lsof | grep PTT

and

$ lsof | grep ttyUSB0



On Δευ, 2017-02-27 at 22:54 +0000, overrocking@...
[direwolf_packet] wrote:

Thanks for the reply,


here is the results:


kd9dcs@bluetracker:/dev $ ls -al /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 0 Feb 27 15:26 /dev/ttyUSB0




as an added bonus here is the udev rule I wrote to create the link:


ATTRS{product}=="CP2104 USB to UART Bridge Controller", SYMLINK
+="PTT", GROUP="dialout", MODE="0660"


Tim ...