ZBT WG3526 - MT7621 - Quectel EC25 USB Issue

Installing and Using OpenWrt
1

I have a WG3526 from ZBT, with SSD installed and Quectel EC25. Custom image is built from trunk.
System works with lot of packages installed, using WAN, and SSD.
Now I want to use the EC25, but
I see USB-connection to go on and off periodically.
Any ideas ?

Below output from lsusb and dmesg:
lsusb:
Bus 001 Device 016: ID 2c7c:0125 Quectel Wireless Solutions Co., Ltd. EC25 LTE modem
dmesg:

[   16.452153] usbserial: USB Serial support registered for GSM modem (1-port)
[   16.459605] option 1-2:1.0: GSM modem (1-port) converter detected
[   16.466118] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB0
[   16.473471] option 1-2:1.1: GSM modem (1-port) converter detected
[   16.480001] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB1
[   16.487330] option 1-2:1.2: GSM modem (1-port) converter detected
[   16.493855] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB2
[   16.501220] option 1-2:1.3: GSM modem (1-port) converter detected
[   16.507778] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB3
[   16.518063] kmodloader: done loading kernel modules from /etc/modules.d/*

......

[   45.281903] device wlan0 entered promiscuous mode
[  116.431383] usb 1-2: USB disconnect, device number 2
[  116.431861] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  116.431986] option 1-2:1.0: device disconnected
[  116.432600] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  116.432728] option 1-2:1.1: device disconnected
[  116.433390] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[  116.433510] option 1-2:1.2: device disconnected
[  116.434148] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[  116.434271] option 1-2:1.3: device disconnected
[  130.197633] usb 1-2: new high-speed USB device number 3 using xhci-mtk
2

Please place your output in preformatted text using the </> icon. It's very difficult to scroll though your post.

3

Sorry, but I do not understand. SImply inserting CNTRL-SHIFT-C not good enough, it looks like.

4

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Please use this icon.
Screenshot%20from%202018-11-08%2014-01-40
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Thanks.

5

Don't get it. Giving up.

6

OK...in the future I hope you're able to:

  • copy
  • paste
  • highlight text
  • and press the </> button

in the future.

Without seeing the log, I'd be guessing...perhaps power to the USB device?

7

Was my first guess, too. But because its internal modem, and it works with org image, based on Mediateks SDK, rather unlikely.