It is strange that the modules are connected with a solid green light but you cannot connect the drone to Mission Planner through your modules.
If you are on a Windows computer can you open up the “Device Manager” and tell me what you see under ports?
You should see something that looks like “Silicon Labs CP210x…”
Then you would select this com port (mine is COM10) in mission planner, and select 57,600 for baud rate.
If you are doing all this and this is not working, I would think you are having an issue with setting up the Telemetry module on your Navio/Raspberry Pi.
If that is the case, could you provide me the contents of your file at /etc/default/arducopter or /etc/default/ardupilot ?
You will need to set up this file as done in this lecture if you haven’t already.