MC7700 unable to send SMS

rfanch3r · February 26, 2023, 3:51pm

Using what to send AT commands? It would need to be scripting compatible.

jyijyi · February 26, 2023, 4:29pm

you can use tera term to open the AT command port to send the commands

rfanch3r · February 26, 2023, 4:42pm

Tera Term is gui based, this IOT device is strictly using command line, its akin to the server version of Arch or Lite Arch linux.

I have attempted to use minicom but this modem is not seen like a normal modem so I cannot query it like a modem.

jyijyi · February 26, 2023, 4:55pm

you can use “cat” and “echo”
e.g.

cat /dev/ttyUSB2 &
sudo echo -ne "AT+CMGF=1\\xd\\xa" > /dev/ttyUSB2

rfanch3r · February 26, 2023, 5:02pm

Hi, can you provide exactly what is needed to send these commands in the way you are proposing?

From my limited research it looks like the MC7700 is being assigned
/dev/cdc-wdm0

I am not at all familiar with the echo lines so I am failing at getting anything from it using the commands you have provided

jyijyi · February 26, 2023, 5:15pm

AT command port should be using /dev/ttyUSBx port
have you installed USB driver?
https://source.sierrawireless.com/resources/airprime/software/usb-drivers-linux-qmi-software-s2,-d-,42n2,-d-,64/#sthash.hUtcA0Yn.dpbs

rfanch3r · February 26, 2023, 5:26pm

This driver looks like its made for x86 Ubuntu as it fails for Arch ARM

I am not sure that this makes any difference but making mention of this regardless:
I am able to receive sms messages as I have a bunch of spam SMS’s
I am only getting a IPv4 IP even though I have specified ipv4v6

rfanch3r · February 26, 2023, 5:35pm

more /var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/make.log
DKMS make.log for SierraLinuxQMIdrivers-S2.42N2.64 for kernel 5.15.68-3-rpi-ARCH (armv7l)
Sun Feb 26 20:25:02 MSK 2023
make: Entering directory '/var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial'
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions Module.* modules.order .cache.mk *.o.ur-safe
make -C /lib/modules/5.15.68-3-rpi-ARCH/build M=/var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial modules
make[1]: Entering directory '/usr/lib/modules/5.15.68-3-rpi-ARCH/build'
  CC [M]  /var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial/GobiSerial.o
/var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial/GobiSerial.c:242:2: warning: #warning "Assuming disc_mutex is locked external to the module" [-Wcpp]
  242 | #warning "Assuming disc_mutex is locked external to the module"
      |  ^~~~~~~
/var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial/GobiSerial.c:773:27: error: initialization of 'void (*)(struct usb_serial_port *)' from incompatible pointer type 'int (*)(struct usb_serial_port *)' [-Werror=incompatible-pointer-types]
  773 |    .port_remove         = Gobi_portremove,
      |                           ^~~~~~~~~~~~~~~
/var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial/GobiSerial.c:773:27: note: (near initialization for 'gGobiDevice.port_remove')
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:289: /var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial/GobiSerial.o] Error 1
make[1]: *** [Makefile:1898: /var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial] Error 2
make[1]: Leaving directory '/usr/lib/modules/5.15.68-3-rpi-ARCH/build'
make: *** [Makefile:25: all] Error 2
make: Leaving directory '/var/lib/dkms/SierraLinuxQMIdrivers/S2.42N2.64/build/GobiSerial'

jyijyi · February 26, 2023, 5:39pm

you can see here to use another driver

rfanch3r · February 26, 2023, 11:43pm

While this driver does seem to compile, the result are not something that’s documented in the readme that’s included.

So it doesn’t look like it makes a usb port that I can interact with.

lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 3: Dev 3, If 12, Class=Communications, Driver=cdc_mbim, 480M
|__ Port 3: Dev 3, If 13, Class=CDC Data, Driver=cdc_mbim, 480M
|__ Port 4: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 480M

jyijyi · February 27, 2023, 1:11am

can you connect the module to Windows platform?

You can also see here which module is in MBIM only

rfanch3r · February 27, 2023, 5:35am

No, I do not have a spot where I can plug this into on a windows system.

jyijyi · February 27, 2023, 5:46am

You can also see here where module is in MBIM only

rfanch3r · February 28, 2023, 2:31pm

It seems Arch Arm linux lacks the correct perl modules to be able to run this script from the page you made mention of.

jyijyi · February 28, 2023, 3:04pm

One thing i don’t understand is that if you don’t have modem port or AT port, how come mmcli is working on your platform?

rfanch3r · February 28, 2023, 5:01pm

I dont know, im assuming this is directly dealing with the modem, I was told that qmicli might be a better use but I am unable to find any commands that are about the same as what I am using for mmcli

jyijyi · February 28, 2023, 5:10pm

here says mmcli (modem manager) already uses qmi interface:

probably that is why you can use mmcli to communicate even without AT command port

rfanch3r · February 28, 2023, 5:18pm

This rolls back to, are the commands I am using causing the original msg that is disallowing me to send text msgs? I cannot tell if this is coming from the cell company or if its some command that I need to issue to unblock them.

jyijyi · March 1, 2023, 1:08am

not much failure cause information from your log. have you verified if the SIM card is OK to send SMS?

rfanch3r · March 1, 2023, 7:14pm

As far as I can tell, there shouldn’t be a reason, the sim provider said they were able to test it however reading the messages does not show any test, I am not sure if they used some other method of testing this but I do not have another device to attempt this on.