PXS8 ttyUSBx are locked on Linux system after SDPORT change | Telit Cinterion IoT Developer Community
December 10, 2015 - 12:49pm, 2598 views
I work under Linux, I have configured the PXS8 modem with this at command "AT^SDPORT=6" (old value is 3), after that the /dev/ttyACM0 appears but after few seconds this interface disappears and ttyUSBx reappears and SDPORTcome back to 3.
I tried to switch to ttyACM0 many ***** but I can't succeed.
I tried to change the at command "AT^SDPORT=2" to test if the value is accepted or not. The modem restart and after that I can't access to ttyUSBx, the interfaces exist but I can't write at commands, I tried with echo, microcom,.. but no result and I can't come back to sdport = 3.
Here my interfaces permissions displayed by ls /dev/ttyUSB* -l:
crw-rw---- 1 root dialout 188, 0 Feb 1 00:02 /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 Feb 1 00:02 /dev/ttyUSB1
crw-rw---- 1 root dialout 188, 2 Feb 1 00:05 /dev/ttyUSB2
crw-rw---- 1 root dialout 188, 3 Feb 1 00:05 /dev/ttyUSB3
Have you any solution for this problem? Is it caused by Linux driver? or It a bug in the modem firmware it self? and How can restore it?
Note: I have restarted the modem (or/and whole system) many ***** but always interfaces locked.