# Usb\_modeswitch on air unit **URL:** \ **Category:** HereLink\ **Created:** [5 October 2021 10:20 UTC](https://discuss.cubepilot.org/t/usb-modeswitch-on-air-unit/7446 "2021-10-05T10:20:10Z")\ **Posts on this page:** 1\ **Showing post:** 16
**Author:** ![Olivier\_Gasté](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/olivier_gast%C3%A9/32/4309_2.png) [@Olivier\_Gasté](https://discuss.cubepilot.org/u/Olivier_Gast%C3%A9)\ **Post date:** [12 October 2021 09:44 UTC](https://discuss.cubepilot.org/t/usb-modeswitch-on-air-unit/7446/16 "2021-10-12T09:44:49Z")
YES !!! ```auto # ping -I eth0 8.8.8.8 PING 8.8.8.8 (8.8.8.8) from 192.168.8.102 eth0: 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=110 time=35.5 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=110 time=34.2 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=110 time=32.4 ms ``` thank’s a lot !!! I finaly get it to work !! so for those looking to do same first : you need correctly libusb.so lib and usb-modswitch tool installed you can get source and compile it from here [https://github.com/joerg65/usb\_modeswitch\_Android](https://github.com/joerg65/usb_modeswitch_Android) or simply get it from my previous message - connect your host directly to usb on air unit - authorize write on system partition `adb shell "su 0 mount -o rw,remount /system"` - autorise push on tmp folder `adb shell "su 0 chmod +w /tmp"` - then copy libusb.so and usb-modswitch to tmp folder `adb push /libusb1.0.so /tmp/` `adb push /usb-modeswitch /tmp/` - moves them to correct folder under a shell `adb shell` ```auto $su #mv /tmp/libusb1.0.so /system/lib64/ #mv /tmp/usbmodeswitch/system/bin/ ``` if you are using like me a HUAWEI 3372 4G modem you will need a conf file for usb-modeswitch tool you can directly write string code it’s up to you ( google is your friend) but I prefer readable conf file - just put the following into a `usb-modeswitch.conf` file and then push it to tmp and moves it to `/etc/` folder ```auto TargetVendor=0x12d1 TargetProductList="14db,14dc" HuaweiNewMode=1 NoDriverLoading=1 ``` - unplug your adb host of air unit and get connected to remote - reboot the air unit - connect your 4G modem to air unit USB OTG port (please use an externaly powered usb cable) - as explained here : [Herelink Ethernet - #3 by Michael\_Oborne](https://discuss.cubepilot.org/t/herelink-ethernet/4369/3) ```auto adb shell (gets you into the gcs unit) adb connect 192.168.0.10 adb -s 192.168.0.10:5555 shell ``` you will reach a shell on air unit - disable auto bridging of eth0 interface (thank’s a lot @Michael_Oborne I would have never find this one without you) ```auto su stop usbethx ``` - check your modem is well registered on usb ```auto # lsusb Bus 001 Device 001: ID 1d6b:0002 Bus 001 Device 003: ID 12d1:1f01 ``` - switch the modem into hilink mode (if you are using another modem you should probably use wwan0 mode and it’s a litel bit more confuse to get qmi working) ```auto # usb_modeswitch -v 12d1 -p 1f01 -c /etc/usb_modeswitch.conf ``` - check your eth0 is registered with : ` ip a` - wake up the interface : ` ifconfig eth0 up` - start dhcpd on eth0 : `dhcpcd-6.8.2 eth0` (it will setup route for you) - check your fresh IPv4 - check you can ping outside : `ping -I eth0 8.8.8.8` I still need to setup a dns correctly if someone can help it looks iptable is empty and seems android dont care about resolve.conf thank’s for all helps --- _[View the full topic](https://discuss.cubepilot.org/t/usb-modeswitch-on-air-unit/7446)._