RM510Q w/RM500Q Firmware AT trouble

[Rusty Nails]

On Thu, Feb 4, 2021, 7:57 AM Reinhard Speyerer <rspmn at arcor.de> wrote:

> On Wed, Feb 03, 2021 at 03:38:24PM -0600, Rusty Nails wrote:
> > im having an issue in windows and linux/modemmanager with this rm510q.
> It
> > seems to start up then stop allowing at commands.  any tips on how to
> > resolve this?
> >
> > [93736.682684] option1 ttyUSB3: GSM modem (1-port) converter now
> > disconnected from ttyUSB3
> > [93736.682723] option 2-2:1.3: device disconnected
> > [93736.682853] cdc_mbim 2-2:1.4 wwan0: unregister 'cdc_mbim'
> > usb-0000:00:1d.7-2, CDC MBIM
> > [93746.221704] usb 2-2: new high-speed USB device number 27 using
> ehci-pci
> > [93746.380581] usb 2-2: New USB device found, idVendor=2c7c,
> > idProduct=0800, bcdDevice= 4.14
> > [93746.380586] usb 2-2: New USB device strings: Mfr=1, Product=2,
> > SerialNumber=3
> > [93746.380590] usb 2-2: Product: RM500Q-GL
> > [93746.380593] usb 2-2: Manufacturer: Quectel
> > [93746.380596] usb 2-2: SerialNumber: 4ffea7a8
> > [93746.382788] option 2-2:1.0: GSM modem (1-port) converter detected
> > [93746.385903] usb 2-2: GSM modem (1-port) converter now attached to
> ttyUSB0
> > [93746.386151] option 2-2:1.1: GSM modem (1-port) converter detected
> > [93746.386509] usb 2-2: GSM modem (1-port) converter now attached to
> ttyUSB1
> > [93746.386742] option 2-2:1.2: GSM modem (1-port) converter detected
> > [93746.387043] usb 2-2: GSM modem (1-port) converter now attached to
> ttyUSB2
> > [93746.387287] option 2-2:1.3: GSM modem (1-port) converter detected
> > [93746.387799] usb 2-2: GSM modem (1-port) converter now attached to
> ttyUSB3
> > [93746.410516] cdc_mbim 2-2:1.4: setting rx_max = 16384
> > [93746.411047] cdc_mbim 2-2:1.4: cdc-wdm0: USB WDM device
> > [93746.411494] cdc_mbim 2-2:1.4 wwan0: register 'cdc_mbim' at
> > usb-0000:00:1d.7-2, CDC MBIM, 2a:f0:1b:0a:cc:4f
> > [93960.490346] usb 2-2: USB disconnect, device number 27
> > [93960.490754] option1 ttyUSB0: GSM modem (1-port) converter now
> > disconnected from ttyUSB0
> > [93960.490800] option 2-2:1.0: device disconnected
> > [93960.491883] option1 ttyUSB1: GSM modem (1-port) converter now
> > disconnected from ttyUSB1
> > [93960.491931] option 2-2:1.1: device disconnected
> > [93960.492272] option1 ttyUSB2: GSM modem (1-port) converter now
> > disconnected from ttyUSB2
> > [93960.492312] option 2-2:1.2: device disconnected
> > [93960.492624] option1 ttyUSB3: GSM modem (1-port) converter now
> > disconnected from ttyUSB3
> > [93960.492665] option 2-2:1.3: device disconnected
> > [93960.492792] cdc_mbim 2-2:1.4 wwan0: unregister 'cdc_mbim'
> > [...]
>
> Hi Russ,
>
> this looks like a case where the Mark Forster lyrics "Flash mich nochmal"
> also apply. According to the subject a RM500Q firmware has been flashed
> on a RM510Q which is usually a no-go. AFAIK even different RM500Q models
> like -GL and -AE have their own firmware files.
>
> Please obtain the matching firmware files for your specific RM5100Q model
> and try flashing again.
>
> Regards,
> Reinhard
>

This was given to me in the state it's in.  I guess an AT command was
issued that caused it to only have an AT port for a second and then just
lose it.  The ports show up but are not accessible. This was with the
original rm510q GL engineering firmware.  He then flashed it to rm500q GL
production firmware and the issue is the same.  I'll try to source the
rm510q firmware. Thank you.
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