Re: How frequently org.freedektop.ModemManager.Modem.Cdma.SignalQuality signals signal strength?

[satya gowtham kudupudi <satyagowtham k gmail com>]

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/ttyUSB0/tty/ttyUSB0/dev

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.1/ttyUSB1/tty/ttyUSB1/dev

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.2/ttyUSB2/tty/ttyUSB2/dev

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.3/ttyUSB3/tty/ttyUSB3/dev

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.4/ttyUSB4/tty/ttyUSB4/dev

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.5/host5/target5:0:0/5:0:0:0/bsg/5:0:0:0/dev

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.5/host5/target5:0:0/5:0:0:0/block/sdb/dev

/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.5/host5/target5:0:0/5:0:0:0/scsi_generic/sg1/dev

this is sys tree i get when i plug in my modem. With this can u say whether my modem is QMI capable? How to add VID/PID pair to the kernel driver and recompile it? Where can i get help? I tried to compile ModemManager and NetworkManager from source a few weeks back, i managed to resolve many dependencies but failed at a particular dependency i don't remember. Please make suggestion on how to proceed.

Thanks!

On Tue, Jul 2, 2013 at 6:35 PM, Bjørn Mork <bjorn mork no> wrote:

Aleksander Morgado <aleksander lanedo com> writes:

> On 07/02/2013 01:13 PM, satya gowtham kudupudi wrote:
>>
>> forevery 30 seconds it says
>> modem-manager[4621]: <debug> [1372763438.794236]
>> [mm-generic-cdma.c:1145] get_signal_quality(): Returning saved signal
>> quality 90
>>
>> what does Returning saved signal quality mean? Does it not getting it
>> from modem? If so, what should i do to get current signal value?
>
> Your modem does expose several tty ports, but only one replies correctly
> to our AT or QCDM probings; which means that you end up with one modem
> which only has 1 port usable, and which also means that you end up not
> being able to refresh signal quality while connected.
>
> But your modem (VID 0x19D2 PID 0xFFF1) is Qualcomm-based, so there's a
> chance that it is a QMI-capable modem (and therefore manageable via the
> QMI support in ModemManager >= 0.7.x); but I didn't see it listed in the
> qmi-wwan kernel driver, so cannot really tell; you would need to check
> that yourself by adding the VID/PID pair to the kernel driver and
> recompiling it. Modems managed via QMI are able to update signal quality
> while being connected.
>
> Bjørn, Dan, have you seen this ZTE-branded CDMA device before? Gobi1k maybe?

Cannot remember seeing it, but that doesn't count much these days...

I don't think it can be a Gobi device. I haven't seen the lsusb output
or equvialent, but assuming that there is a 1-1 mapping between USB
interfaces and ttyUSBx devices, then ttyUSB0 would not be an AT capable
port if this was a Gobi device.

But I do see "Revision:MDM6085-11" in the log, and the MDM6085 chipset
is definitely a 3G EVDO Gobi chipset.  This doesn't necessarily mean
that ZTE has licensed Gobi firmware for it, but it could mean that one
of the unknown serial ports is actually a QMI/net port.

We need probing or Windows *.inf files to tell more.


Bjørn

--
- Gowtham