I am researching a new coding algorithm. I am transmitting and coding a text file using payload_tx.py and then write the binary of the packet payload to a file to do offline analysis.
I am having trouble writing packet payloads to file, however, because the I can't seem to find a way to get data out of a gr_message except for the to_string() method. If I try and convert the string back to binary (my attempt involved python's binascii module), I get an "Error: illegal char" message.
This makes sense, since the data is still coded, and should not be a valid ascii string. But how can I get around this problem and write binary to file?
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Colleen Josephson
http://www.cjosephson.netDept. of Electrical Engineering and Computer Science
Massachusetts Institute of Technology
Class of 2013