I have an LTE Router with Openwrt Firmware. The EC25-E mpcie Module is no longer recognized.
I tested a lot, and the Module gets 3.3 V Voltage. It’s not found in Openwrt, I suspect the EC25-E firmware is defective.
No /dev/cdc-wdm0 device is found and there is no TTYUSB.
Is there an emergency mode? Can I install the firmware in another way?
Hello, you can check whether there is a USB device labeled by quectel. If there is but the device is not recognized, it may be a driver installation problem. You can also try to identify it in Windows. Looks like a driving problem.
Thanks for the answer. No Quetel USB device is found. The LTE router worked perfectly. Suddenly the LTE connection was interrupted. Since then, the module is no longer recognized. a fresh install of openwrt didn’t help.
I think the Firmware ist damaged because i checked the Voltage on the Module.
I measured 3.3v on the mpcie Slot. First Pin from the left on the small right bar. To the left there is the nose.
What do you want to know? Should I measure on a pin of EC25-E? Which pin?
Otherwise I can only check under Linux/Openwrt. no devices under lsusb or lspci.
Show the output of cat /sys/kernel/debug/usb/devices
Check the voltage on mPCIE connector - pins 2, 39, 41, 52 are “VCC_3V3” according to EC25_Mini_PCIe_Hardware_Design_V2.3
If there is no voltage there - check if your router has a GPIO port responsible for PCIE power control.
Thanks for the help so far.
There should be test points to close. I can not find them. Connecting vdd_ext and usb_boot with a cable does not work.
I will give the days again external 1.8v on usb_boot and report.