Global IOT Modem M18QWG

skorpeo's picture

On the product page it says "The M18QWG module provides cellular modem functionality..." but then in the user guide revision 1.4 it says "-Modem-mode use case removed".  Is there anyway to get instructions on how to get this to work?  The board is enumerated in linux as a usb0 interface and dmesg reports

[10155.722566] cdc_acm 5-1.4:1.4: ttyACM0: USB ACM device
[10155.732445] cdc_acm 5-1.4:1.6: ttyACM1: USB ACM device
[10155.740722] usb-storage 5-1.4:1.9: USB Mass Storage device detected
[10155.747153] scsi host5: usb-storage 5-1.4:1.9
[10155.767226] cdc_ether 5-1.4:1.0 usb0: register 'cdc_ether' at usb-PNP0D10:02-1.4, CDC Ethernet Device, 76:a7:7c:93:4f:08
[10155.778289] usbcore: registered new interface driver cdc_ether

I am able to send AT commands via /dev/ttyACM0.  ATI command, outputs version: Revision: MPSS: M18Q2_v12.09.170553 APSS: OE_v01.00.174241

The usb0 interface is DOWN I tried to bring it up, but the interface won't come up.  I was also unable to find any relevant AT commands in the published guide.  Is there any info on what the relevant AT commands, as well as linux procedure to start up a modem connection?  If this information can't be posted publicly can you please provide any guidance on how to get the magic sauce?

PeterF's picture

These Starter Kits have been factory configured with "host mode" firmware and at this time operation as a modem peripheral to a different host processor is not supported!


Can you possibly provide more detail of your use case? eg.
- Are you working with your own custom hardware, or a popular 3rd party board?
- What OS are you running on your host processor?


skorpeo's picture

I'm running centos and using usb interface.  I am interested in using the chip for our own hardware, however so far development is not possible due to all the restrictions.

skorpeo's picture

can you explain why it is still advertised with modem functionality?

jflynn129's picture

It was incorrectly advertised as supporting "modem mode" as the firmware in the SK2 has not been certified in this mode of operation.  Not supporting this mode was a business decision that can not be explained in this forum.

kingleo373's picture

Don't know much about the M18QWG module and people doing work in this field and they have positive ratings about it. The zety resume shares some more quick notes which will lead us towards the best research of all time.

 I am interested in using the chip for our own hardware, however so far development is not possible due to all the restrictions... Boise, ID

 I am interested in using the chip for our own hardware because I'm running centos and using usb interface.  Richland, Washington