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With the announcement of the Pi Zero W I'm very keen to try one with my software. It'll probably take a while to get one, but it would be ideal for building a wireless Brewpi at probably the lowest price. There's probably even no point using a multi-chamber setup. One Pi, one chamber.

RPints was originally specified to run on a Pi model B. The Pi Zero is basically the same but runs a little faster (1GHz instead of 700MHz).

Let's not do the math for the heating or cooling element.

I'd expect it to work on a Zero W, but you might have difficulty getting hold of one for a while.

Fridge constant mode is much less precise than beer constant mode. In beer constant mode, brewpi measures the beer temperature then adjusts the fridge temperature to (slowly) cause the beer temperature to change (or remain constant). In fridge constant mode it measures only the fridge...

Ok.

If you like.

The resistor is on the host side. I plug and play my sensors all the time.

I think the heat-shrink joint is waterproof, but not particularly good. I have tried a couple of things. First, remove the heatshrink, then slide on a short piece of silicone tubing. The diameter must be a snug fit for the wire (which is smaller than the stainless steel cap). The silicone...

CraftBeerPi recently added an option to invert the outputs. I don't use this software, but there should be a configuration option for this somewhere easy to find.

If you google the error message "importerror no module named mysqldb" you'll get a bunch of explanations for potential causes of this error. I don't know exactly how your Pi is set up, but you do, so you should be able to see what solutions might be applicable to you.

Grab yourself a bag of these: http://www.dx.com/p/diy-90-degree-angle-micro-usb-male-plug-adapters-black-10-pcs-363228 Then you can make your own power lead and use heavier gauge wires. Some of the cheap USB cables use really thin wiring which can lead to a voltage drop.

Yes, Fuscus is but one example, but it serves to illustrate the situation quite well. :) I am not sure that sudo is needed for GPIO access these days. Once I am done with my current travels I'll check it out.

Great job! Just curious, but will your later version (Arduino controller) support, er, other BrewPi compatible devices?

My solution was to re-write everything in Python. No compiler, no HEX file, no Arduino.

The actual reading of the thermometers is done in w1_thermometer.py https://github.com/Manuel83/craftbeerpi/blob/ec104de328d2116c503c90d4182a6b8f04c70fd8/brewapp/base/thermometer/w1_thermometer.py Or w1_thermometer2.py...

When all you have is a 3D printer, everything looks like it needs to be 3D printed. How about inserting a 3mm hole in the model (which would accept a 3mm LED without a bezel), and then using hand tools to open up the hole to accept 5mm LEDs or arbitrary-sized bezels/housings? The 3mm hole...

Can you modify the query? Sticking OG in there, by hand, for every row is extremely inelegant. I suppose you don't always have a choice though.

Wouldn't the OG be the first SG result when you query the database? And the FG is the last one, when you order by date. No need to store them separately, but it would be advisable to double-check the readings with a hydrometer and make a note with pen and paper.

It sounds similar to a Son of Fermentation Chiller, which uses frozen bottles of water in a small chamber with a PC fan to cycle air from the main chamber to cool it.