Tutorial 1 | Raspberry Pi Kernel update for Sixfab 3G/LTE shield’s usb drivers

İsmet Ergin • 4 Nov 2016

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Original Raspbian Jessie kernel doesn’t support Quectel EC25/UC20 modules, then we fixed kernel, you can replace your module files with new files.

  1. Run sudo rpi-update command and update kernel your Raspberry pi
  2. Reboot your machine
  3. You can use your modem with /dev/ttyUSB3


Issues :

  1. If ttyUSB3 does not appear under folder /dev/ when the 3G ( UC20 ) module is plugged in, and ‘device not accepting device address XXX, error -71‘  appears on the ‘dmesg’ output, please change your USB cable.