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Mastervolt sunwatch 25 display unit.

Submitted by markbeal2 on Sun, 04/12/2011 - 16:50

 Anyone know how to interface with the sunwatch 25 display unit? I want to read Watts from the diplay unit or via the wireless transmission to control my immersion heater via the Arduino uno. I have just bought the Uno so not familliar with it yet or what it can do.

Cheers

Mark.

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glyn.hudson's picture

Re: Mastervolt sunwatch 25 display unit.

Submitted by glyn.hudson on Sun, 04/12/2011 - 18:23.

Hi Mark,

It will probable be a closed protocol, if you fancy the challange go for it! But probable an easier way is to use an emonTx with a clip on CT sensor to sense the AC power coming out of the inverter. See my post on this thread regarding monitoring solar PV http://www.openenergymonitor.org/emon/node/291

Good luck,

Glyn. 

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markbeal2's picture

Re: Mastervolt sunwatch 25 display unit.

Submitted by markbeal2 on Thu, 08/12/2011 - 20:08.

 Yes Thanks Glyne, I found the firm that makes them "leiderdorp instruments", I contacted them and they mention something about I2C which I know nothing about. So I'm going to used CT's with true RMS converters I have.

Well I'm getting there some how I think.

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