I have the XB3-C-A2-UT-001 cell module, and I can’t get the cell firmware update to complete in X-CTU. I am using the XBIB-CU-TH dev board and set to cell bypass mode, and it always gets stuck in the state “Waiting for modem port…” for a very long time (about 5 minutes per try), and after retrying 3 times it quits with error “Could not communicate with the cellular modem over USB”. I tried reinstalling the cellular drivers from ublox and that did not help. I even tried another Xbee module and still had the same issue. I am wondering what else to try to get it to work.
Slide switches left towards board end or I2C bus is disconnected in custom hardware.
Ensure both USB’s are connected to computer and device manager recognizes the XBee FTDI chip.
Ensure the USB C is connected to a USB 3.0 port on your computer for XBIB-CU-TH or the XBee is sufficiently powered in custom hardware. Powering specs in manual.
Configure the modem in XCTU:
~ First write default settings.
~ Write ‘Bypass Mode’ to AP
~ Write ‘USB Direct’ to P1 (Configs GPIO for modem USB)
~ Write ‘4’ to DO (Enables USB modem VBUS)
Press the reset button.
Ensure your computer now recognizes the Qualcomm modem in device manager.
Thank you soterboat. Digi does not have this procedure anywhere to be found. How did you find this procedure? It actually worked for me. Shame on Digi for lack of support.