Sierra Wireless card: access to modem for AT commands?

[LTE-Card]

what‘s code type in terminial in linux OS (Ubuntu 21.10), then i can get screen and talk with sierra wireless card AT command

I test screen /dev/tty.wwan 115200 , but fail

Thanks

 

[Bronxteck]

if you are using Mac OS you can try with the screen command 

here is an example for a netgear but should be similar for your sierra

https://kb.netgear.com/22923/How-do-I-issue-AT-commands-with-AirCard-modem-on-Mac-OS-X

[LTE-Card]

I am use Ubuntu OS 

The em7305 wwan card good work  in Linux and Windows  10

I  can see em7305 hardware in terminal but i don't know how to use AT command

Could you help me .thanks

[Bronxteck]

why enter "a710" dont you have to declare the gobi then what you want to do to it?

[Hervé]

You can't enter an AT command at the Linux prompt! You need to be connected through a terminal app to the serial port attached to the modem...

[LTE-Card]

Yes, I just typed this command and prompted an error code

Cannot exec'/dev/tty.wwan':No such ffile or directory

Is there another step that needs to be set?

Thanks

[Hervé]

You're not targetting the correct device so you need to identify that 1st. Check the /dev directory to begin with...

[LTE-Card]

When I plug in the em7305 network card and sim card in my X230 machine The computer can go online normally

After the lsusb command is entered, three usb devices are displayed  （ttyUSB0  ttyUSB1 and ttyUSB2）

What command do I need to enter, then I can get the link em7305 and I can enter AT commands

Thanks again

 

 

[Hervé]

Then, target those tty devices individually with your screen command. See if any gets you on the modem.