Have you reached out to the manufacturer? Maybe they're cool with sharing?
On Oct 13, 2015 5:03 AM, "Justin Richards" <justin.richards@gmail.com>
wrote:

> Subsequent testing seem to indicate that the various commands are indeed
> repeatable.  Must have been looking at the wrong part of the capture.
> LogicSniffer seems to have some quirks.
>
> On 13 October 2015 at 14:57, Justin Richards <justin.richards@gmail.com>
> wrote:
>
> > I have decided to go with Russels Arduino suggestion.  Some folks have
> > kindly made available a Java based client called LogicSniffer that
> > interfaces to an Arduino running logic_analyser a SUMP Protocol
> > Implementation.
> >
> > To my surprise, both of these worked out of the box pretty much.
> >
> > I now have some traces that I am trying to decode.  Bit more involved
> than
> > I had thought.
> >
> > For those playing along ...
> >
> > The setup involves a Control Box that drives the fan, water pump, water
> > dump valve etc for an evaporative A/C.  It is connected to a remote
> control
> > interface via 4 wires.  I will call them 5V:X:Y:GND
> >
> > The remote control interface has several buttons, LEDs and a fan speed
> > dial.  It contains a atmega8535l
> >
> > When the remote control is removed line X repeatedly produces a very
> short
> > burst of  bits and Y produces a continuous square wave.
> >
> > When the remote control is connected, both X and Y float high with a
> > narrow low pulse on X every 10secs or so.  Y is tied to Vcc once the
> remote
> > control is plugged in.  I guess this tells the Control Box that there i=
s
> a
> > remote control connected.  This also means there is only 1 wire for
> > bi-directional comms.
> >
> > When a Stop command is issued, the capture on X looks very much like an
> > RC-5 command with 150ms burst of data..
> >
> > When a Start command is issued, the capture on X is two 350ms bursts of
> > data.  The second burst may be an ACK.
> >
> > Unfortunately, I have yet to see a start or stop capture look like any =
of
> > the previous captures.  Unfortunate because these are the commands I wa=
nt
> > to reproduce.  I was hoping it was a simple case of record and replay.
> >
> > Attached is a sample of 2 start and 2 stop captures.  Nothing jumps out
> at
> > me so I will continue to record and compare and try to trace the signal
> to
> > the PIC once it has cooled down enough that I wont get complaints if I
> turn
> > it off.  Warming up here in Perth WA.
> >
> > Cheers Justin
> >
> >
> > [image: Inline images 1].
> >
> >
> >
> >
> >
> >
> >
>
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