[OpenTRV-dev] Sous-vide cooking with Arduino aka very precise temperature control

[Kevin Wood]

I built a controller for my home brew setup using an AVR implementing a
simple PID controller. I'd be happy to share the code from.

I do wonder if a PID would the right for a TRV, though. PIDs are generally
very good at minimising error but expensive in terms of the number of
output adjustments the algorithm generates.

With a battery powered TRV I'd have thought we could afford quite a wide
"dead zone" around the setting point before comfort is sacrificed, and in
doing so, avoid too much motor activity, thus saving battery power.

I don't doubt that there are aspects of a PID algorithm that will help us,
though.

Kevin

> Hi all,
>
> Adafruit has a great example (with code) of controlling the temperature of
> a rice cooker with an Arduino:
> http://www.adafruit.com/blog/2013/06/10/sous-vide-controller-powered-by-arduino-the-sousviduino-the-adafruit-learning-system/
>
> There may be some inspiration to get from the code, in particular the use
> of the PID library.
>
> Cheers,
>
> Bruno
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