I have an EM7455, which will power on with the LPM enabled. at!pcinfo? State: Low Power Mode LPM voters - Temp:0, Volt:0, User:0, W_DISABLE:0, IMSWITCH:0, BIOS:1 LPM persistence - None I then use the QMI command to set the “FCC authentication” as its called: qmicli -d /dev/cdc-wdm0 --dms-set-fcc-a…

@Barton : what exactly is this command? Even I didn’t hear about this command earlier… @fs1 : Yes… I tried the mentioned steps when my module was in Low power mode with ‘W_DISABLE’. If you succeeded in recovering the module, let me know the steps :smiley: -Alex

Hot to change the PRI? The working device has this: Current Firmware info --------------------- Model ID: EM7455 BOOT Version: SWI9X30C_02.08.02.00 AMSS Version: SWI9X30C_02.08.02.00 SKU ID: 1102527 Package ID: Carrier: 1 PRI version: 001.000 Current Carrier Name: GENERIC Current Cairier Version: …

Yes, the PRI is irrelevant. The NV setting you are looking for is written as part of the OEM vendor config. If you download the firmware package from whatever OEM vendor you got this modem from and unpack it, then you will find 3 different firmware parts (multiplied by the number of supported oper…

Thanks, the problem is that even if I flash the regular NVU from source.sierrawireless the FCC setting still applies.

Yes, I believe that is by design. It is Non-Volatile… You have to actively disable the setting. The regular NVU files won’t do that. And you might also have to replace the OEM NVUP file? That might also be persistent if written to flash before. I don’t know.

Unfortunateley I have no idea on how to do that, I flashed all available files from the source. You might wonder why I want this, with the FCC I can’t use the modem in MBIM mode. I can’t send the FCC authentication. Switching from MBIM to QMI, then load the GobiNet driver helps, but I can’t change…

Hi, Can you try below steps and see if it’s working or not… To set Set at!pcfccauth=1: Step 1. at!unlock=“A710” at!pcfccauth=1 at!pcfccauth? Step 2. Reset device To set Set at!pcfccauth=0: at!unlock=“A710” at!pcfccauth=0 Step 2. Reset device Let me know whether this is helpful -Alex

It would be great to know whether the tip from Rex_alex works. But just FYI in case it doesn’t: You can send the QMI FCC auth request in MBIM mode. Look at how it is implemented in ModemManager/libqmi/libmbim. This Just Works with the recently released ModemManager 1.6.

Privileges have a password “A710” not enough. For solutions need used engenering mode, by AT!OPENLOCK… Example, for my Sierra EM7305: === activate FCC_AUTH === at!entercnd="A710" OK AT!PCFCCAUTH? NV setting: 0 Auth enabled: 0 Lock state: 0 OK AT!PCFCCAUTH=1 ERROR AT!OPENLOCK? 8101A18AB3C3E66…

On my intended device there is no ModemManager available, which makes it a bit complicated. (umbim does not do this afair) Does not work unfortunateley. at!unlock="A710" ERROR at!pcfccauth? ERROR AT!ENTERCND="A710" OK at!pcfccauth? NV Setting: 1 FCC Auth Enabled: 1 FCC Lock State: 1 OK at!pcfc…

EM7455, Deactivate Low-Power-Mode

IoT Modules MC/EM Series

dl5162 November 11, 2021, 6:51am 26

I believe 9079 is a Lenovo specific PID with FCCAUTH enabled by default. The generic MC7455/EM7455 PID is 9071.

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EM7455, Deactivate Low-Power-Mode

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