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Originally Posted by opiesche
No, I've never seen that system 
Looks interesting - in the end, it seems similar to what I did, only using an Arduino instead of the Pi. |
You do have the option of purely running it on a Linux box (with a web UI) too. Might still be worth looking at merging the two bits of code - I'm sure the lead home climate control developer would be interested in your system either way, if you posted to the mailing list...
I'm planning to control actuators (both mo-mo type, and wax capsule), and also to measure various flow/return temps, and the outside temperature too (plus maybe solar radiation strength to avoid overheating the high-thermal-mass zones on sunny mornings).
The gas boiler (AKA heater, furnace etc.) which I'm using has a pretty sophisticated API, and I'll set the set-point flow temperature down to the minimum necessary to maximise efficiency (do a google image search for "condensing boiler return temperature efficiency" e.g.
etc. - I'm planning a setup without a mixing valve for this reason...
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I've not looked at the I2C bridges
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They're quite handy in that they give you 8 1-wire busses for each i2c connection. I guy I know ("wookey" - he might turn up here later, since he's planning his UFH system at the moment) used them a few years ago to connect his ARM "BalloonBoard" to some Dallas 1-wire sensors for his solar thermal monitoring and control system.
Tim.