Update README.droneid

gnuradio/gr-droneid/docs/README.droneid

@@ -9,3 +9,19 @@ in this package. A quick listing of the details can be found in Python
 after importing by using:
 
     help(droneid)
+
+# Notes
+This module is currently *very much* an Alpha.  Please don't rely on it for *anything*.  It tends to trail behind the MATLAB/Octave code by weeks!
+
+It currently does some very basic functions:
+- Burst detection by using cross correlating for the ZC sequence
+- Burst extraction using the correlation scores from the cross correlation above (see note 1)
+- Coarse CFO estimation and correction (see note 2) 
+- OFDM data carrier extraction
+
+Some things still left to do:
+- Channel equalization using the two ZC sequences (https://github.com/proto17/dji_droneid/blob/main/matlab/updated_scripts/process_file.m#L119-L134 and https://github.com/proto17/dji_droneid/blob/main/matlab/updated_scripts/process_file.m#L155-L166)
+- Function-izing the Turbo decoder and rate matcher (https://github.com/proto17/dji_droneid/blob/main/cpp/remove_turbo.cc) and using the function(s) to deal with Turbo decoding and rate matching to output full frames
+- Parse the frame to spit out something that users can actually use (maybe JSON?)
+- Create a more robust timing offset estimator (likely autocorrelating the ZC sequence(s))
+- Figure out how to deal with integer frequency offsets (currently just able to detect and correct for fractional offsets)