Dear community, I am writing as I am trying to set up a PC Engines APU3C4 embedded board ( PC Engines apu3a2 product file ) with a Sierra Wireless MC7455 module. The board is running OpenWrt. I installed all the needed packages, but I cannot seem to make the LTE connection work. The kernel modules…

The firmware is quite old, please upgrade to the latest one for vodafone and test again https://source.sierrawireless.com/resources/airprime/minicard/74xx/em_mc74xx-approved-fw-packages/ Also make sure it is using correct sim slot in at!uims?

Thank you very much for your reply! Do you know which could be the quickest way to flash the new firmware? I tried with qmi-firmware-update under OpenWrt, but I’m getting: root@OpenWrt:~/MC7455_FW# qmi-firmware-update -t /dev/ttyUSB2 --ignore-mm-runtime-check -U SWI9X30C_02.24.03.00.cwe SWI9X30C_0…

In windows, you can run the exe file to update In linux, are you sure /dev/ttyUSB2 is the DM port? [image] EM7455 can't connect to T-Mobile (+CME ERROR: no network service) MC/EM Series I have a rebranded (Dell) EM7455 that works great on AT&T but I can’t get it to con…

Thanks a lot! It turned out I actually needed to reboot my PC after installing the Sierra Wireless driver. After a reboot, I can now flash the firmware directly using the Windows .exe (that is no more returning the 0x0 error). I was also able to do some additional tests, after checking the output o…

Unable to make MC7455 recognize my SIM card

IoT Modules MC/EM Series

jyijyi January 8, 2025, 2:18pm 4

In windows, you can run the exe file to update

In linux, are you sure /dev/ttyUSB2 is the DM port?

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Unable to make MC7455 recognize my SIM card

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