Update README.md

README.md

@@ -1,9 +1,40 @@
+NanoVNASaver
+============
 A small tool to save touchstone files from the NanoVNA, and to allow sweeping frequency spans in sections to gain more than 101 data points.
+
 Copyright 2019 Rune B. Broberg
 
+### Introduction
+This software connects to a NanoVNA and extracts the data for display on a computer, and for saving to Touchstone files.
+
+Current features:
+- Reading data from a NanoVNA
+- Splitting a frequency range into multiple segments to increase resolution (tried up to >10k points)
+- Displaying data on Smith charts and logmag-charts for both S11 and S12
+- Displaying two markers, and the impedance and VSWR (against 50 ohm) at these locations
+- Exporting S11 touchstone files
+
+Expected features:
+- 2-port Touchstone files
+- Mouse control of markers
+- Further data readout for markers, such as return loss
+- TDR function (very important in this community ;-)
+- Reading and displaying Touchstone files
+
+![Screenshot of version 0.0.1](https://i.imgur.com/kcCC2eK.png)
+
+### Windows
+
+The software was written in Python on Windows, using Pycharm, and the modules PyQT5 and pyserial.
+
 ### Linux
 
 In order to run this app in Linux environment, you'll need the following packages:
 
 * `python3-serial`
 * `python3-pyqt5`
+
+### License
+This software is licensed under version 3 of the GNU General Public License. It comes with NO WARRANTY.
+
+You can use it, commercially as well. You may make changes to the code, but I (and the license) ask that you give these changes back to the community.