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Old 06-02-2012, 12:43 PM   #1
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Default Interest check for BrewPi, a Raspberry Pi fermentation controller/data logger

Hi Brewers,

My name is Elco Jacobs and you might know me from my previous project UberFridge.

I am planning to start a community for a new open source fermentation controller that runs on the brand new Raspberry Pi. I will bootstrap the project by porting UberFridge to the Raspberry Pi, but I don't want to stop there.

In a nutshell, the BrewPi will be open source (GitHub) and my goal is to make it the ultimate temperature controller, with a web interface, data logging, graphs, brewing logs and even digital specific gravity sensing and logging.

Converting UberFridge to the Rapsberry Pi and getting other brewers involved in the development will make it possible to make it a plug and play build with a one click install script.

I would like to invest all the time I have in this project, instead of working in an office, and therefore I am writing a business plan.

I have a lot more information about my plans for BrewPi on the following link:

http://brewpi.com/survey/index.php?sid=72293&lang=en

It's a mix between info and questions and you would help me a lot if you could answer these for me.

All questions are optional, so just answer as many as you feel comfortable.

I will be available for questions here for about 1.5 hours, but I'll be back tomorrow to answer more questions.

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Old 06-02-2012, 01:47 PM   #2
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Hi

Any idea of cost?

Bob

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Old 06-02-2012, 02:05 PM   #3
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Rough estimate:

Raspberry Pi: 35 + 10 accesoires
Arduino: 25
OLED display: 25
Other electronics: 20?

Just a rough guess.. This excludes a digital sg sensor, just data logging and temperature control.

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Old 06-02-2012, 03:37 PM   #4
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what programming language?

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Old 06-02-2012, 03:45 PM   #5
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Hi

Looks like the poll is asking about Python ... good question though.

Bob

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Old 06-02-2012, 03:54 PM   #6
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just saw that... python would be great.

linux is great too...

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Old 06-02-2012, 04:29 PM   #7
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Hi

My guess is that the Linux machine is just doing web stuff, so Python would make a lot of sense. The heavy lifting code wise is probably in the little guy. I suspect it's running some flavor of C with some inline assembler here and there.

Bob

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Old 06-02-2012, 05:00 PM   #8
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Awesome!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I am in. I got in on the first order. I am waiting for mine to shipped to me.

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Old 06-02-2012, 05:52 PM   #9
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Merge it with http://www.ospid.com/blog/ and you would have a nice setup.

Arduino for the IO and control, Raspberry Pi for the logging and web interface/video display and user input control (setting temps, turning switches on and off, etc.). Allow for multiple arduinos as input (Kegerator, Fermentation, Brewery). The OSPID give you basic local control/interface and the Pi gives you a master server for them to report to.

This has been my plan for a while. I'd love to help where I can.

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Old 06-02-2012, 09:55 PM   #10
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Hi

Some sort of cheap/rugged multi drop bus between the Linux box and the little guys would be a nice touch. There shouldn't be a lot of traffic, so it could be something pretty simple. Single pair RS-485 comes to mind, but there are *lots* of other options. If you keep it something like RS-485, you can at least get adapters to do debug without the Linux box involved. Things like that make development a lot easier.

Bob

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