added some stuff

docs/index.rst

@@ -4,14 +4,24 @@
    contain the root `toctree` directive.
 
 Welcome to the TMTC commander core documentation!
-===================================
+=================================================
+
+This module is a generic tool for satellite developers to perform TMTC (Telemetry and Telecommand)
+handling and testing via different communication interfaces. Currently, only the PUS standard is
+implemented as a packet standard. This tool can be used either as a command line tool
+or as a GUI tool. The generic parts were decoupled from the former TMTC program and integrated into
+a separate submodule to allow for easier adaption to other missions.
+
+This client currently supports the following communication interfaces:
+
+1. Ethernet, UDP packets
+2. Serial Communication 
+3. QEMU, using a virtual serial interface
 
 .. toctree::
    :maxdepth: 2
    :caption: Contents:
 
-
-
 Indices and tables
 ==================