MC7710 is never detected as a serial device.

IoT Modules MC/EM Series
1

I can’t get my AirPrime MC7710 detected as a modem device. On linux, I get the following:

[    2.105909] usb 1-1.6: new high-speed USB device number 8 using ehci-pci
[    2.193137] usb 1-1.6: New USB device found, idVendor=05c6, idProduct=9008
[    2.193150] usb 1-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    2.193151] usb 1-1.6: Product: QHSUSB_DLOAD
[    2.193153] usb 1-1.6: Manufacturer: Qualcomm CDMA Technologies MSM
[    2.193814] qcserial 1-1.6:1.0: Qualcomm USB modem converter detected
[    2.193871] usb 1-1.6: Qualcomm USB modem converter now attached to ttyUSB0

I could not find any documentation on your site that tells me what to do with this virtual /dev/ttyUSB0 serial port (it doesn’t respond to AT commands). (I have the proper cdc_mbim, cdc_qmi, option and cdc_acm modules compiled in my kernel)

When I connect the device to a windows 7 machine, it is recognized as an “unknown QHUSB_DLOAD” device, without any matching drivers found. I’ve installed the Skylight Connection Manager Build 4260 as mentioned on your website, but this software fails to detect the device.

The “MC7710 FW 3.5.24.0 (QMI) (.exe)” firmware upgrade software fails to find any serial ports, so is of little help here.

Is this device simply missing the firmware, or is this a faulty device? If (hopefully) not the latter: how can I flash the firmware onto the device?

Many thanks in advance!

2

The 05c6:9008 device ID is a generic Qualcomm QDL ID. Don’t think I’ve ever seen an MC7710 report as that before. The “QHSUSB_DLOAD” product string is also an indication that this device is in Qualcomm’s firmware download mode.

This looks like an old Gobi 1000 device to me. If it really is an MC7710, then it might suffer from a severe case of amnesia. Maybe the bootloader is gone and this is some on-chip failsafe rom mode allowing you to fix that?

I think you need to contact the source you got this modem from to find out how to fix it. It’s not supposed to behave like that…

3

I guess this is what I get for buying modems on ebay :frowning:

Oh well, thanks for the help anyway!