Hi all, We are using 2 variants of the Sierra Wireless modem (MC7421 and EM7565) in the field on an edge device. We have about 300+ devices now but recently we are experiencing devices losing 4G connectivity completely. Note we did not attempt any firmware upgrade or reconfiguration via QMI or AT c…

it was kept in download mode you can try to download FW and see if you can recover it

Thanks for the quick reply. What’s download mode? I’m looking at the product’s technical specification but it doesn’t mention anything about a download mode. Does this indicate that there’s something wrong with the firmware on the modem? Can you point to the a guide/ docs on how I can download the…

it means boot-and-hold mode in specification See if this helps to download FW: [image] Unable to upgrade firmware for EM7411 MC/EM Series @leo You might also want to check what rights you have against that interface, you might be able to see it but not write to it. pi@r…

I haven’t attempted the firmware update, however it seems like it requires both /dev/ttyUSB0 and /dev/cdc-wdm0. On my affected modems, only ttyUSB0 exist and cdc-wdm0 does not. Can I still update the firmware?

i think so, you can try [image] Swiflash PORT not found If you are using fwdwl application in boot and hold mode, you need to add “-c QMI” parameter: owner@ubuntu:~/QMI/MBPL/MBPL_SDK_R32_ENG2-fwdwl.bin/SampleApps/lite-fw-download$ sudo ./bin/fwdwl-litehostx86_64 -c QM…

I’m trying to flash the same firmware version used by the rest of our fleet. The MC7421 uses the firmware version shown below. Where can I download the older release? I can’t seems to find an older build from this link: https://source.sierrawireless.com/resources/airprime/minicard/74xx/em_mc74x1-ap…

you can see here: [image] Where to find old EM7565 firmware? Where to find old EM7565 firmware? Now i’m using fw 01.14.02.00 version, but i want to try some old generic versions, where i can find them? Thanks for answer

so I tried to flash the MC7421 modem with the command below and it returned an error code FW download failed: eSDP_FWDWL_ERR_FIREHOSE_STATE_ERR(120) ./fw-download-toolarm -c QMI -d /dev/ttyUSB0 -f /mnt/data/sw_firm/ Subsequent command to flash the firmware fails and recommended a power cycle of th…

Nvm, after doing a hard reboot of the entire system, the modem is now showing up and in QMI mode!

@jyijyi thanks for the help. It was weird that the fw download tools says that the firmware update failed, yet the modem works when we power cycle the entire device. We’ll test on another modem we have that’s experiencing the same issue and see if we can repeat the process and update its firmware. …

MC7421 and EM7565 stuck in weird mode

IoT Modules MC/EM Series

jyijyi February 6, 2025, 3:13am 6

i think so, you can try

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MC7421 and EM7565 stuck in weird mode

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