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

you have downloaded the wrong file, it should be “MBPL_DRIVERS_R44_ENG5-usb-pcie-src.tar”

yes, my bad..now i have downloaded correct one

hi @jyijyi do i need to compile both ? [image]

i don’t think so you can see if you can compile binary driver for qcserial.ko usb_wwan.ko qmi_wwan.ko

[image] EM9291 How to on PCI and QMI For Developers Board: miniPC ERVPES E3C 16GB, 512G NVME, QCNCM865 Modem: EM9291 through NVME M2. M+B key adapter (with of course dedicated power supply line from USB) OpenWrt SNAPSHOT, r35…

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 :slight_smile: old tool qmi-firmware-update is obsolete.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”?

EM9291 how to enable QMI mode?

Legacy Open AT

jyijyi July 10, 2026, 9:00am 34

is it same issue as this one for “failed reason: sim-missing”?

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EM9291 how to enable QMI mode?

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