Reading Wireless Air Transmitter using Arduino

[Nickorossa]

Hi
Has anyone managed to successfully read wireless air pressure transmitters using an arduino (or similar) and a suitable receiver? I did do a bit of searching, but couldn't find anything.
Thanks.
Nick.

 

[tursiops]

I don't think anyone has even reported hearing the signal, much less decoding it.

Hi
Has anyone managed to successfully read wireless air pressure transmitters using an arduino (or similar) and a suitable receiver? I did do a bit of searching, but couldn't find anything.
Thanks.
Nick.

 

[broncobowsher]

That would be a neat project. Even if it ended up just being a bench project. Turn the bottles on, look at a bench display, know they are transmitting and what pressure is inside. Or more important, you left them pressurized and are running down the batteries in the transmitters.

 

[Kohanbash]

Is the protocol open? Does anyone have documentation for it?

What’s the frequency?

 

[tursiops]

Is the protocol open? Does anyone have documentation for it?

What’s the frequency?

38kHz

 

[Nickorossa]

Is the protocol open? Does anyone have documentation for it?

What’s the frequency?

Even finding that information seems difficult.

Mares don't seem to provide it in their manuals and product specs.

Suunto reference 5.3KHz in their d6i tech specs.

Shearwater and compatibles use the 38KHz mentioned above.

As for documentation on protocols and transmission details, I haven't found anything yet.

Nick.

 

[jensfisc]

You could try something like a proxmark3 and figure out how to downscale the receiving frequency into the transmitters frequency. Those are very good for black box protocol testing and reversing.

 

[dm9876]

cool project idea. these things will all work in the LF / VLF near feild which is how they can work underwater. you'll need apropriate reciever coil. the mention of 5.3khz suggests it could be related to the old school heartrate monitors which operate at that frequency and on the same principles. Not sure about the 38khz ones. Some other thread talks a bit about it seems to be a widely used transmitter by OEM Pelagic Pressure Systems

Air Integration

this article talks more about the heart rate monitors, but gives you some idea how you might go about building a reciever front end for such a project

RMCM01 is a Heart rate monitor for Polar chest belts.

of course you would still then need to reverse engineer the protocol itself.

Dean

 

[Cio]

If someone has a dead one, opening it up and looking at the chip would be the best start.

 

[tursiops]

If someone has a dead one, opening it up and looking at the chip would be the best start.

What would you be looking for on the chip? We already know the transmission frequency....