how to enable QMI on E9191 modem by AT? [image]

is it same issue as this one for “failed reason: sim-missing”? [image] Unable to detect SIM card on MC7304 MC/EM Series Hi Jyijyi, Can the power Management settings on the CentOS make the SIM power down and we can get the error SIM Missing? […

just give a try: qmicli -d /dev/wwan0qmi0 --device-open-proxy --dms-at-command=“AT!SIMDETPOL?” qmicli -d /dev/wwan0qmi0 --device-open-proxy --dms-at-command=“AT!SIMDETPOL=0,0” : UIM1 polarity. 0-LOW for card inserted, 1-HIGH for card inserted : UIM2 polarity. 0-LOW for card inserted, 1-HIGH for …

I have more challenging question here: how to flash EM9291 in PCI/QMI mode (under openwrt)? :slight_smile: old tool qmi-firmware-update is obsolete. MBL tool like "fw-download-toolarm64linaro -o -f " sets modem in BOOT&HOLD but kernel removes all /dev/wwan* devices in that time during reset so the …

in boot and hold mode, there will not be any wwan interface. Only the /dev/ttyUSB0 is used to download firmware in boot and hold mode. you can first test in a Ubuntu PC and you should not see any wwan interface during boot and hold mode.

I was checking /dev/tty* devices under openwrt and nothing was created that time… why? I was wondering if EM9291 needs to be set in some USB mode first like “AT!USBCOMP=1,3,0000100D”?

have you tested in USB mode in ubuntu PC? Here shows it should enumerate the download port /dev/ttyUSB0 in boot and hold mode: [image] EM9293 firmware upgrade failed MC/EM Series is your module in MBIM mode? Just did a test in Ubuntu PC, no problem is found f…

what should be installed on ubuntu to achive this? any partcular drivers? desktop or server version?

i use Ubuntu 18/20/24 in desktop version via USB communication You can download the linux driver “MBPL_DRIVERS_R48_ENG4-usb-pcie-src.tar” here: Mobile Broadband Package for Linux (SDK, Drivers, Documentation)

one question how your modem is connected for flashing? directlly in PCIE slot through an adapter b-key → nvme or through an adapter b-key to USB port? Actually Im connected to PCIE M.2 and I have only those devices: root@E3C:~# ls -ltr /dev/ttyU* ls: cannot access ‘/dev/ttyU*’: No such file or di…

EM9291 how to enable QMI mode?

Legacy Open AT

jyijyi July 10, 2026, 9:32am 39

have you tested in USB mode in ubuntu PC?
Here shows it should enumerate the download port /dev/ttyUSB0 in boot and hold mode:

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EM9291 how to enable QMI mode?

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