Sinamics First thank you for your passion and work to create UAVmatrix. I am just getting started with LTE integration and your software is SO worth the money. I would love to help with the Sixfab option. They seem to make very high quality products and if we can get it to work while a little heavy, it makes for an elegant solution. I have the latest version of the Cellular IoT HAT certified for Verizon. After a few weeks of testing and 3 calls with Verizon Tier 2 Data support the device is running on my PI 3. I have successfully been able to access UAVcast using the HAT modem however the PI will crash within 30 to 60 seconds. Again, anything I can supply in the form of logs or configuration options to help you would be my pleasure.
