Unable to upgrade firmware for EM7411

IoT Modules MC/EM Series
1

Trying to upgrade the firmware for EM7411 using MBPL but it cannot find the device. System is a Raspberry PI running raspbian. Command and output below:

fwdwl-literpi --devpath /dev/cdc-wdm0 --modelfamily 4 --fwpath "../firmware" --cwe SWI9X50C_01.14.03.00.cwe --nvu SWI9X50C_01.14.03.00_TMO_002.005_000.nvu
Application version: 1.0.2106.0
Unable to locate the device user specified.  Found device /dev/cdc-wdm0Unable to locate the device.
Exiting Application!!!

Device is present as per lsusb:

lsusb | grep Sierra
Bus 001 Device 011: ID 1199:9090 Sierra Wireless, Inc.

Any help is greatly appreciated!

2

see if this helps on using the command:

3

@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@raspberrypi:~ $ ls /dev
autofs           cuse       i2c-1    loop5         mmcblk0p2  ram11  ram7     shm     tty12  tty21  tty30  tty4   tty49  tty58  ttyAMA0    vcs1   vcsa3     vcsu3    video14
block            disk       initctl  loop6         mqueue     ram12  ram8     snd     tty13  tty22  tty31  tty40  tty5   tty59  ttyprintk  vcs2   vcsa4     vcsu4    video15
bsg              dma_heap   input    loop7         net        ram13  ram9     stderr  tty14  tty23  tty32  tty41  tty50  tty6   uhid       vcs3   vcsa5     vcsu5    video16
btrfs-control    fb0        kmsg     loop-control  null       ram14  random   stdin   tty15  tty24  tty33  tty42  tty51  tty60  uinput     vcs4   vcsa6     vcsu6    watchdog
bus              fd         log      mapper        ppp        ram15  raw      stdout  tty16  tty25  tty34  tty43  tty52  tty61  urandom    vcs5   vcsa7     vcsu7    watchdog0
cachefiles       full       loop0    media0        ptmx       ram2   rfkill   tty     tty17  tty26  tty35  tty44  tty53  tty62  v4l        vcs6   vcsm      vhci     zero
cdc-wdm0         fuse       loop1    media1        pts        ram3   sda      tty0    tty18  tty27  tty36  tty45  tty54  tty63  vchiq      vcs7   vcsm-cma  video10
char             gpiochip0  loop2    mem           ram0       ram4   sda1     tty1    tty19  tty28  tty37  tty46  tty55  tty7   vcio       vcsa   vcsu      video11
console          gpiomem    loop3    mmcblk0       ram1       ram5   serial0  tty10   tty2   tty29  tty38  tty47  tty56  tty8   vc-mem     vcsa1  vcsu1     video12
cpu_dma_latency  hwrng      loop4    mmcblk0p1     ram10      ram6   sg0      tty11   tty20  tty3   tty39  tty48  tty57  tty9   vcs        vcsa2  vcsu2     video13
pi@raspberrypi:~ $ ls -l /dev/cdc-wdm0
crw------- 1 root root 180, 176 Sep 24 16:13 /dev/cdc-wdm0
pi@raspberrypi:~ $ su
Password:
root@raspberrypi:/home/pi# ls -l /dev/cdc-wdm0
crw------- 1 root root 180, 176 Sep 24 16:13 /dev/cdc-wdm0
root@raspberrypi:/home/pi# chmod +777 /dev/cdc-wdm0
root@raspberrypi:/home/pi# ls -l /dev/cdc-wdm0
crwxrwxrwx 1 root root 180, 176 Sep 24 16:13 /dev/cdc-wdm0
root@raspberrypi:/home/pi#

Regards

Matt

4

Thank you, that worked!

For anyone that stumbles into this, the solution to load a firmware into the EM7411 is to make sure you specify BOTH the tty and cdc devices (the -d and -p flags), AND the download mode is set to 1 (the -t 1 flag). The final command is:

fwdwl-litearm -d /dev/ttyUSB0 -p /dev/cdc-wdm0 -t 1 --modelfamily 4 --fwpath "./" --cwe SWI9X50C_01.14.03.00.cwe --nvu SWI9X50C_01.14.03.00_TMO_002.005_000.nvu
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