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Wind Masthead Transducer Interface
#1
Hi All,
I've got a 45' Van de Stadt Agulhas here in South Africa.
My old instruments are mostly all toast.
I'm excited to pursue the OpenPlotter route!

I would appreciate a first pointer towards how to interface a Raymarine Wind Masthead Transducer with the Pi running OpenPlotter?
The Transducer has 5 wire connections:
Red and Black is for power
Green and Blue is for wind direction
Yellow is for wind speed.

Thanks so much!
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#2
(2021-04-08, 02:29 PM)aviljoen Wrote: Hi All,
I've got a 45' Van de Stadt Agulhas here in South Africa.
My old instruments are mostly all toast.
I'm excited to pursue the OpenPlotter route!

I would appreciate a first pointer towards how to interface a Raymarine Wind Masthead Transducer with the Pi running OpenPlotter?
The Transducer has 5 wire connections:
Red and Black is for power
Green and Blue is for wind direction
Yellow is for wind speed.

Thanks so much!

the link below should help in what you should be seeing:
https://forum.raymarine.com/showthread.php?tid=97

As for how to integrate it - the speed may work from the new GPIO pulses section - but I haven't used this.  the direction is a analogue voltage which may need an analogue to digital converter to get in to the pi.

if you have the ST50/ST60 wind indicator - see if it puts out an Seatalk 1 output (even if the screen itself is not working), this can be read into the Pi with a $3 optocoupler
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#3
Yes, A2D converter sounds interesting.
Possibly a simple circuit like this would suffice?
https://kookye.com/2017/06/01/design-a-v...ge-sensor/

Then how do I go about reading the value into- and displaying the value in OpenPlotter?
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#4
I wonder is you could use this:

https://www.waveshare.com/wiki/Current/P...onitor_HAT

I was talking to somebody on the SignalK slack channel and they had made a plug in to get the results of this into signalK.  you can use the extra 2 channels for battery monitoring.  you would have to work out what the voltages meant in degrees, should be simple calculation
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#5
(Yesterday, 03:06 PM)Techstyle Wrote: I wonder is you could use this:

https://www.waveshare.com/wiki/Current/P...onitor_HAT

I was talking to somebody on the SignalK slack channel and they had made a plug in to get the results of this into signalK.  you can use the extra 2 channels for battery monitoring.  you would have to work out what the voltages meant in degrees, should be simple calculation

Yes, spot-on, now I also see this board which includes ADC as well as all the standard motion and environmental sensors you could wish for.
https://www.pishop.co.za/store/sense-hat...egory_id=0

(Yesterday, 03:06 PM)Techstyle Wrote: I wonder is you could use this:

https://www.waveshare.com/wiki/Current/P...onitor_HAT

I was talking to somebody on the SignalK slack channel and they had made a plug in to get the results of this into signalK.  you can use the extra 2 channels for battery monitoring.  you would have to work out what the voltages meant in degrees, should be simple calculation

Hi Techstyle,
How do I get to the signalK plug in you mention for this HAT?
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#6
I am not sure how to tag another member and them get it but:

you would ask member @xbgmsharp about it
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