Added support for pre-defined Topic IDs in the subscribing client (note that this is untested because I don’t have a broker that supports it)
Added support for displaying short and pre-defined topic types in verbose mode
Corrected client id field length
Corrected the maximum length of a MQTT-SN packet (in this tool)
Added checks to make sure various strings aren’t too long
Removed trailing whitespace
Renamed ‘Unsupported Features’ to limitations.