RM510Q w/RM500Q Firmware AT trouble

[Reinhard Speyerer]

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