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Topic: Reprogramming the AAG RS485 Weather Station (Read 7 times) previous topic - next topic

Graynomad

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I believe the original 1-wire instrument switched resistors with its reed switches so as to get unique A/D readings for each direction.

That would make a difference. Still I think removing a magnet would be easier. Maybe add a similar weight to keep the balance.

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Rob
Rob Gray aka the GRAYnomad www.robgray.com

EmilyJane


Quote
I believe the original 1-wire instrument switched resistors with its reed switches so as to get unique A/D readings for each direction.

That would make a difference. Still I think removing a magnet would be easier. Maybe add a similar weight to keep the balance.

______
Rob


Very good. That's exactly what those inscrutable Chinese did. That gray thing that looks exactly like the other one is a dummy. Only one is a magnet.

I'm proud to say I figured it out before I actually verified it. Like Sherlock Holmes said, whenever you've exhausted all the possibilities, whatever is left, no matter how improbable, is the answer.

So maybe that's what the patent is for.  :)

Graynomad

Rob Gray aka the GRAYnomad www.robgray.com

EmilyJane


He he, do I get a prize :)

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Rob


Sorry, no. :) Good job, though!

The remaining mystery to me is why they went to such trouble to hide what they are doing. The dummy looks EXACTLY like the real magnet. It's like they had a big batch of defective ceramic magnets to use up. The rotor that operates the HE for wind speed does have two functional magnets and looks identical to the Wind direction rotor. Curiouser and curiouser.

I'm still left with the problem of reprograming the stock chip. Anyone with any suggestions about that please step in.

Graynomad

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reprograming the stock chip

I'd buy a $20 programmer like this

http://www.pololu.com/catalog/product/1300

from Pololu or someone (there are a few around) and make up a 6-way to 5-way cable.

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

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