4G (LTE) Telemetry and Control of Pixhawk using Pi3

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I have been developing the solution for 4G / LTE telemetry and control link for Pixhawk using raspberry pi3.

Problems:
most solutions have high CPU usage / high latency / or use 3G network at most (sakis3g and Wvdial do NOT support 4G)!
There are almost no solutions for restricted Cell provider (when ports are closed) on both ends (on Raspberry modem and Computer LTE Modem)

Results:
I have archived latency of 70ms on average and 100ms at most on 3G (4G drops it down to 33ms average)
VNC / ssh /Mavlink connection over 4g
Automatic 4G modem recognition and connection (Hot Plug-able!)
Internet is routed over modem once connected, and routed back to wifi when disconnected Automatically.
simultaneous operation on local network (wifi) and 4G - thus no reconfiguration is needed if you want to switch over to wifi (simply change the target address and port)
You can use ANY mobile operator (The only setting that may need to be changed is APN, but it is done by plugging modem into computer-super easy)

This has been developed on special order, no specific details can be disclosed publicly.

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