I’ve set-up a Raspberry PI / Pixhawk drone and successfully controlled it over Wifi via the Cloud APIs. When I use a 4G dongle instead of Wifi, the status light turns green in the MyDevices page (https://my.flytbase.com/devices/) indicating that the connectivity is working. However, I get a “drone is not reachable” from the API.
What is the protocol between the Cloud APIs and the Raspberry Pi? Is this a http connection, TCP, UDP connection or something else?