ModemManager using QMI doesnt always work in the first attemp.

[c.lobrano at gmail.com]

Hi José, Aleksander,

my two cents here

 > I have also noticed that ModemManager uses not documented AT+CFUN 
modes:
 >
 > root at ccimx6sbc:~# mmcli -m 0 --set-power-state-off
 > ModemManager[791]: <info> Modem powered off... may no longer be 
accessible
 > successfully set new power state in the modem
 > root at ccimx6sbc:~# microcom /dev/ttyUSB2
 >
 > OK
 > at+cfun?
 > +CFUN: 7
 >
 > OK
 > root at ccimx6sbc:~# mmcli -m 0 --set-power-state-low
 > successfully set new power state in the modem
 > root at ccimx6sbc:~# microcom /dev/ttyUSB2
 > at+cfun?
 > +CFUN: 6
 >
 > OK
 >
 > The only documented modes are 0, 1, 4 ,5 (see
 > 
http://www.coniugo.de/tl_files/dateien/downloads/at/AT%20Commands%20LE910.pdf,
 > page 106).

Here you can find a more recent document that defines also state 7

http://www.telit.com/products/cellular/4g/

e.g. If your modem is a LE910 (namely non V2):

Parameters:

<fun> - is the power saving function mode
0 - minimum functionality, NON-CYCLIC SLEEP mode
1 - mobile full functionality with power saving disabled (factory 
default)
2 - disable TX (Not support)
4 - disable both TX and RX
5 - mobile full functionality with power saving enabled
Special modes , you can see them through the read command but you can't 
set those
mode :
7 – Offline mode
8 – FTM

Carlo


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