Servers by jDrones

Sending and Receiving User Defined Messages using Dronekit

Hi.
I have a setup contains a computer, a raspberry pi, a flight controller, and 2 telemetry modules.
I would like to send and receive user-defined messages (for example “Hello World”).
The sender will be raspberry pi and the receiver will be computer.
Inside the aerial system, telemetry module, and raspberry pi connected to flight controller on serial telemetry ports.
On the GCS, the telemetry module directly connected to the computer.
How can i send this message from raspberry pi to the computer?
Is there an example (preferably using dronekit)?
Thanks…

Servers by jDrones