I have the POS terminal which uses i.mx 258 chipset with dual sim gprs modem integrated.
The gprs modem device is created as /dev/ttymxc0.
I am able to start the gprs modem and establish the data connection by providing correct settings in dialout script.
When I start the data connection using ttymxc0 device, I need to show the signal strength at the same time,
I tried getting the signal strength using AT+CSQ command but am not able to access the device as its used by pppd,
says: can't create '/var/lock/LCK..ttymxc0': File exists
Is there any way I can get the signal strength and data at the same time? can you please provide me some pointers for fixing this issue.
