Sirius F9P Rover USB connection problem

ZED-F9P RTK
#1

I was configuring Sirius F9P Rover module and after changing message output on UART2 the device seemed to work ok, but after saving the configuration and the restart it hanged in the boot loop.
I’m unable to establish any USB connection, because it constantly connects and disconnects.
I managed to brick that way two devices, and i have still one spare left that works fine with factory default settings.

Is there a way to flash the device without usb or debug it somehow?

Here is the usb debug output i have managed to get from my linux host:

[1819987.658049] cdc_acm 3-3:1.0: ttyACM0: USB ACM device
[1819988.040960] usb 3-3: reset full-speed USB device number 72 using xhci_hcd
[1819988.392943] usb 3-3: reset full-speed USB device number 72 using xhci_hcd
[1819989.179738] usb 3-3: USB disconnect, device number 72
[1819990.051593] usb 3-3: new full-speed USB device number 73 using xhci_hcd
[1819990.215849] usb 3-3: New USB device found, idVendor=1546, idProduct=01a9, bcdDevice= 1.00
[1819990.215852] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[1819990.215853] usb 3-3: Product: u-blox GNSS receiver
[1819990.215855] usb 3-3: Manufacturer: u-blox AG - www.u-blox.com
[1819990.281960] cdc_acm 3-3:1.0: ttyACM0: USB ACM device
[1819990.664862] usb 3-3: reset full-speed USB device number 73 using xhci_hcd
[1819991.016832] usb 3-3: reset full-speed USB device number 73 using xhci_hcd
[1819991.798018] usb 3-3: USB disconnect, device number 73
[1819992.663535] usb 3-3: new full-speed USB device number 74 using xhci_hcd
[1819992.831753] usb 3-3: New USB device found, idVendor=1546, idProduct=01a9, bcdDevice= 1.00
[1819992.831755] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[1819992.831757] usb 3-3: Product: u-blox GNSS receiver
[1819992.831758] usb 3-3: Manufacturer: u-blox AG - www.u-blox.com

#2

Hi there,

Yes, you can possibly debrick the device with the help of an FTDI module. Use u-center to revert the device to default configuration. You can also check the functionality on PuTTy.

First of all,

  1. Connect the FTDI USB / TTL to a computer using a mini-USB cable.
  2. Connect the JST-GH 6 pins cable on the JWT side to the FTDI USB / TTL so that Rx and Tx coincide (connect inversely).
  3. Connect the JST-GH 6 pins cable on the JST side to the UART1 connector of the ZED-F9P board.

Then, open the u-center.
Select the associated COM port and choose the default configuration icon found in the action toolbar.

I hope this helps.