ModemManager and Iridium 9522b

[Eric Younkin - NOAA Federal]

Hi Aleksander,

Thanks for the quick reply!  I don't think that is possible.  I don't think
it even likes 38400.  See below from the manual:

5.121 +IPR - Fixed DTE Rate (Revised Implementation)

This implementation applies to the 9522A/9505A IS060xx and later and all
software releases for
9522B, 9555(A), 9523, 9575, 9601, 9602, 9602-SB, and 9603.

Set Command: +IPR=<rate>[,<autoflag>]

Set the data rate at which the ISU will accept commands. The change in data
rate takes effect after the
result code (e.g., OK) is received by the DTE.
<rate> takes the following values:

1 600 bps
2 1200 bps
3 2400 bps
4 4800 bps
5 9600 bps
6 19200 bps (default)
7 38400 bps

Note: The use of 38400 bps with ISU models “9505” or “9522” is not
recommended because the ISU
can not handle this rate without losing some bits of data.

On Thu, Aug 3, 2017 at 3:28 PM, Aleksander Morgado <aleksander at aleksander.es
> wrote:

> Hey
>
> >
> > I am trying to get my Iridium 9522b modem recognized using mmcli.  It is
> > connected on /dev/ttyUSB2 with 19200, 8, N, 1.  I can successfully
> > communicate via AT commands through pyserial or minicom, so I'm confident
> > that it is functioning.
> >
> > Below are the scan and list outputs from mmcli as well as lsusb.  The
> > usb-serial cable connected to the Iridium is Bus001 Device005.
> >
> > pi at raspberrypi:/usr/lib/arm-linux-gnueabihf/ModemManager $ sudo mmcli -S
> > successfully requested to scan devices
> > pi at raspberrypi:/usr/lib/arm-linux-gnueabihf/ModemManager $ mmcli -L
> >
> > No modems were found
> >
> > pi at raspberrypi:/usr/lib/arm-linux-gnueabihf/ModemManager $ lsusb
> > Bus 001 Device 006: ID 0403:6001 Future Technology Devices International,
> > Ltd FT232 USB-Serial (UART) IC
> > Bus 001 Device 005: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial
> > Port
> > Bus 001 Device 004: ID 0403:6001 Future Technology Devices International,
> > Ltd FT232 USB-Serial (UART) IC
> > Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
> SMSC9512/9514
> > Fast Ethernet Adapter
> > Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
> > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> > pi at raspberrypi:/usr/lib/arm-linux-gnueabihf/ModemManager $
> >
> > I know that there is a plugin for Iridium modems, specifically this 9522b
> > that I am using.  Is there something I need to do to get it to detect it?
> >
>
> Can you update the baudrate configuration in the modem itself to be
> 57600bps?
>
> Also, could you run ModemManager in debug mode to get full debug logs? See:
> https://www.freedesktop.org/wiki/Software/ModemManager/Debugging/
>
>
> --
> Aleksander
> https://aleksander.es
>



-- 
Eric Younkin
Physical Scientist
NOAA OCS, Hydrographic Systems and Technology Branch
1315 East-West Highway
N/CS11, Room 7854
Silver Spring, MD 20910
Office: 301-713-2809 x139
Cell: 828-331-8197
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