433M83Octave

Please notice that this is NOT complete and NOT functional yet!

A set of tools for GNU Octave, to help analysing and decoding (not only 433MHz) ISM band signals.

What?

This is not a real-time protocol decoder, but a set of helpful tools to analyse recorded and already demodulated signals from audio files.

Analysing unknown signals often requires "just looking at them", comparing waveforms, zooming in- and out, as well as applying filters, offset corrections and many more...

These ISM protocols are all completely different and come in endless variations of

modulation
bitrate
number of bits
preambles
DC fillers
stuff-bits
time-coded bits
error corrections
...

At least for simple, digital protocols, Octave (or 433M83Octave :) can be really helpful here.

It can

load waveforms
store as time-value format
apply filters
calculate offsets and moving thresholds
find peaks
estimate bitrates
extract packets from long recordings
split waveforms
stack plots to compare them
decode data
...

Prerequisites

In addition to an installation of GNU Octave, the following Octave packages are required:

octave-signal
...

Usage

From within Octave

change to the directory where you copied the 433M83Octave tools
type source asSigTools.m to load the functions.

Fire up a quick example by typing asTest("signals/433M83_02.wav")

todo...

Examples