Hi, I’ve had a failure on my EM 160R recently. It was largely my fault. My module is EM160RGLAP and I found out later that the ‘AP’ means it uses exclusively the PCIe interface and not the USB.
Of course, I executed the command AT+QCFG=“data_interface”,0,0 which attempts to change to the USB interface. When I rebooted the module it was totally unresponsive (which is not surprising, as I told it to change to an interface that it does not have).
On the back of most (all?) Quectel modules there are several small pads to solder diagnostic / test wires to.
I have been sent an image of the use of these pads:
I’ve been told to solder wires to the debug rxd and debug txd pads, and have successfully soldered fine enamelled copper wire. I have got a ttl to usb convertor and connected that using the 1.8v setting, but the module is still unresponsive. (If I loop the convertor it echoes commands in Putty).
I am told if I connect 1.8v to the ‘force_usb_boot’ that may help? But what do I load, and do I use the rxd and txd connections, or the main pins?
That has nothing to do with TX/RX. The pin is named force_usb_boot not force_uart
You need to check for new USB devices, you should probably get something with pid 9008.
Thanks… Was your module the PCIe-only version (my module is PCIe only) or USB and PCIe?
And I assume your module was plugged into a M2 to USB (PCIe?) adaptor?
Finally … got around to trying this. Connected fine enamelled Cu wires to VREG_L6_1P8 and FORCE_USB_BOOT. Put the EM160 in an adaptor and powered it up, and connected these two wires together. Nothing happened!
I think the module is totally dead - as it’s a PCI-only module, FORCE_USB_BOOT means nothing as it doesn’t use USB. I think a hardware fuse is blown. Oh well, just don’t issue the command to tell it to use a non-existent USB connection in future…
Hi radiomean, to put in qdl_mode you need qualcomm drivers if not loaded quectel ones and check the com port in d_manager ; you have to use a usb2 adapter because to load the firmware the connection is via usb2 not usb3 althought it is a pci_card.
