I messed up. I got this SIMCOM module recently, with 5G support.
SIM8262E-M2
This is based on Snapdragon X62 Modem.
It has 4 modes(or product IDs) of operation:
at+cusbcfg=? gives the following: 9001,9003,9011,901e
The default factory mode is 9001.
All the modes (except 901E) provide /dev/ttyUSB (I learnt the hard way!) and you can issue AT commands via those(using minicom etc.)
I mistakenly changed the mode to 901E, now I'm unable to get any serial ports from this!
however this still has /dev/cdc-wdm0
I can use qmicli and mbimcli to interact:
[xplore@fedora ~]$ sudo qmicli --device=/dev/cdc-wdm0 --device-open-proxy --dms-get-operating-mode
[/dev/cdc-wdm0] Operating mode retrieved:
Mode: 'online'
HW restricted: 'no'
My question: How do I change the mode back to one of (9001,9003,9011) ? OR is there any way to issue AT commands via qmicli/mbimcli ?
I have also tried the following(refer this post or this):
[root@fedora xplore]# modprobe option
[root@fedora xplore]# echo 1e0e 9011 > /sys/bus/usb-serial/drivers/option1/new_id
But after running this I don't see any /dev/ttyUSB* devices. (do I need to do anything else here?, I'm clearly not an expert in Linux)
Currently it shows up as:
[root@fedora xplore]# lsusb
Bus 008 Device 003: ID 1e0e:901e Qualcomm / Option SDXLEMUR-LITE-MTP _SN:1505A7A0
dmesg output:
[ 2449.622442] usb 8-2: new SuperSpeed USB device number 5 using xhci_hcd
[ 2449.635211] usb 8-2: LPM exit latency is zeroed, disabling LPM.
[ 2449.636702] usb 8-2: New USB device found, idVendor=1e0e, idProduct=901e, bcdDevice= 5.04
[ 2449.636704] usb 8-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2449.636704] usb 8-2: Product: SDXLEMUR-LITE-MTP _SN:1505A7A0
[ 2449.636705] usb 8-2: Manufacturer: SIMCOM
[ 2449.636706] usb 8-2: SerialNumber: 0123456789ABCDEF
[ 2449.803329] cdc_mbim 8-2:1.2: setting rx_max = 16384
[ 2449.803997] cdc_mbim 8-2:1.2: cdc-wdm0: USB WDM device
[ 2449.804219] cdc_mbim 8-2:1.2 wwan0: register 'cdc_mbim' at usb-0000:6b:00.0-2, CDC MBIM, 16:dd:bf:a1:af:08
[ 2449.816224] cdc_mbim 8-2:1.2 wwp107s0u2i2: renamed from wwan0
I also tried the following:
Enabled debug mode for ModemManager
sudo mmcli -m 0 --command="AT"
error: command failed: 'GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Connected: No AT port available to run command'
But it shows that AT port isn't exposed.
Please help me out here, this devices is expensive for me and the device has extensive AT commands documentation, without which I cannot use it much.
More Documentation:
https://www.waveshare.com/w/upload/c/c6/SIM82XX_SIM83XX_Series_AT_Command_Manual_V1.02.pdf
https://www.waveshare.com/wiki/USB_TO_M.2_B_KEY#Working_With_SIM82XX_Module
https://www.waveshare.com/wiki/SIM8262E-M2_5G_HAT
https://github.com/torvalds/linux/commit/5417a7e482962952e622eabd60cd3600dd65dedf
This is fixed!
However the fix isn't a solution to this problem.
I fixed it by getting latest drivers for Windows, after installing them I could see COM ports open!
I used putty to connect to serial port and change the mode back:
AT+CUSBCFG=USBID,1E0E,9003