I’m trying to use an EM7455 from ThinkPenguin.com on an Ubuntu 22.04 machine. I’m able to connect through a T-Mobile IOT SIM without any problem. But after an unspecified amount of time the connection will fail. I think I found where I need to send the module AT+ZCDRUN=E\r\n because somebody decid…

Do you install windows driver? [image] EM7430 drivers not working correctly on Dell Precision 3571 Windows 11 MC/EM Series you can check whether you have the modem port for AT command communication in device manager. If no, see here on how to get back the serial ports …

I dont have com ports. How do i get them back?

Do you see modem port in decvice manager? You can also see here for the Configuration.ini when installing the USB driver in Windows: [image] USSD Software for Windows 10 MC/EM Series you can open Configuration.ini and change “USBCOMP=8” and run the driver setup again …

EM7455 connection halts

IoT Modules

jyijyi April 23, 2023, 2:35am 2

Do you install windows driver?

Topic		Replies	Views
Impossible to get AT port in Win11 for EM7455 MC/EM Series	9	271	September 10, 2025
EM7455 disconnected, no network connection IoT Modules	14	582	January 31, 2024
COM Port for AT test commands at EM7455, Windows 10 MC/EM Series	7	8217	February 8, 2026
EM7455 Unable to run AT commands via com port	2	1874	October 19, 2020
How do I enter AT commands for EM7355? MC/EM Series	25	3834	May 17, 2024

EM7455 connection halts

Related topics