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Old 12-16-2013, 03:40 AM   #11
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Not to be negative?!

I don't think it was intended as a full featured system, it's clearly thrown together on a breadboard as a demo.

Nor is your comparison fair, because (for example) TeensyPi and BrewPi both piggyback an Arduino (or similar) on top of the RPi because of its limited I/O capabilities. This demo uses BBB on its own.
I've never understood this concern regarding limited I/O on the Pi for brewing purposes. For what's being shown in this demo, no Arduino is necessary to make a Pi do the same thing. I run my entire hotside brewery on a standalone Pi using 3 pins total (1wire, HLT SSR, BK SSR). For dual-stage fermentation control you'd use the same number of pins, and for single-stage fermentation you'd only need 2. Where's the I/O limitation come into play?

BBB is certainly a great board as well, fwiw.
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Old 12-17-2013, 08:48 PM   #12
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I've never understood this concern regarding limited I/O on the Pi for brewing purposes. For what's being shown in this demo, no Arduino is necessary to make a Pi do the same thing. I run my entire hotside brewery on a standalone Pi using 3 pins total (1wire, HLT SSR, BK SSR). For dual-stage fermentation control you'd use the same number of pins, and for single-stage fermentation you'd only need 2. Where's the I/O limitation come into play?
I'm not dissing the Pi at all. Well perhaps only slightly because I couldn't get my hands on one last year and you are right you can do plenty of stuff with just a few pins. Brewing does not need very fast I/O and if you did want extra pins to drive valves or pumps or something, the I2C bus (2 pins) plus a 16 bit expander chip will provide all the connectivity you could possibly need.

If you want analogue inputs for any reason you need an external ADC which would be a total pain. But that's not a deal breaker by any means.
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Old 12-19-2013, 09:13 PM   #13
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I've never understood this concern regarding limited I/O on the Pi for brewing purposes. For what's being shown in this demo, no Arduino is necessary to make a Pi do the same thing. I run my entire hotside brewery on a standalone Pi using 3 pins total (1wire, HLT SSR, BK SSR). For dual-stage fermentation control you'd use the same number of pins, and for single-stage fermentation you'd only need 2. Where's the I/O limitation come into play?

BBB is certainly a great board as well, fwiw.
The reason BrewPi uses Arduino as far as i know is because it ALWAYS runs.

This as well as a RaspPi are still PC's at their core that can lock up or crash in some fashion. What happens when your RaspPi crashes over the weekend on your fermentation fridge? Best case it stops doing whatever its doing, worse case it heats your chamber up until you catch it or freezes your beer.

Microcontrollers on the other hand dont suffer this problem as much because they just run through a set sequence, if they do somehow lock up(which is extremely rare if the code is done properly) its easy to remotely restart them and it just automatically starts back up again like nothing ever happened.

RaspPi's are notorious for crashing, while Arduino's arent powerful enough to host the complex web server BrewPi uses...which is why they use both...to get the best of both worlds..the processing power of the RPI and the always on reliability of the Arduino.

That said this is a very cool project and idea to handle ferm control for those without room for a fridge. Im curious how robust the BBB is compared to a RaspPi.
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Old 12-20-2013, 01:52 PM   #14
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Oh I certainly get the benefits of a microcontroller vs a PC and why one might choose a PIC-based solution over a linux-based solution. I have also, amongst my various builds, built a brewery expansion board that had an in-board AT328P to interface with (Fun little board to work with). My confusion stems from people's complaints with the RasPi specifically having low I/O.

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Old 12-21-2013, 02:16 PM   #15
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Without wishing to put you on the defensive BBB is better hardware in other respects IMO. Industrial grade TI chip versus mass produced Broadcom with dodgy USB and proprietary documentation. RPi power supply issues.

But we are making beer not nuclear weaponry

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Old 12-21-2013, 09:43 PM   #16
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Without wishing to put you on the defensive BBB is better hardware in other respects IMO. Industrial grade TI chip versus mass produced Broadcom with dodgy USB and proprietary documentation. RPi power supply issues.

But we are making beer not nuclear weaponry
No worries, I don't believe the RPi is the end-all-be-all for brewery equipment, I just happen to use one in my pilot lab and will be using one in my commercial brewery once permits are finished.
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Old 12-28-2013, 11:50 AM   #17
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I got a BBB for Xmas. I originally thought I was going to be building around it. I think for myself I will let bcs do all the hard work and the BBB keep the logs and show live data during brew day, and serve up video during wait times.

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Old 12-28-2013, 01:29 PM   #18
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The BB white (original) version has been steeply discounted, it's down to $30 now which is in an absolute steal if you don't need HDMI.

http://www.seeedstudio.com/depot/beagle-bone-p-1152.html?cPath=6_113

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Old 05-03-2014, 05:16 AM   #19
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I have a BBB and m using it for a lot. It controls my rims tube via a pid, as well as controlling my pumps (3 12v and 1 120v), and I can control the flowrate of the 12v pumps with pwm. Each of the pumps has a flowmeter so I can see flowrates and track transfer volumes. I also have four DS18B20 temp probes to track all my temps. All in all , I think the BBB has a lot to offer to brewers (though you obviously have to be able to program them, which can be a barrier).


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Old 05-07-2014, 04:05 AM   #20
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I have a BBB and m using it for a lot. It controls my rims tube via a pid, as well as controlling my pumps (3 12v and 1 120v), and I can control the flowrate of the 12v pumps with pwm. Each of the pumps has a flowmeter so I can see flowrates and track transfer volumes. I also have four DS18B20 temp probes to track all my temps. All in all , I think the BBB has a lot to offer to brewers (though you obviously have to be able to program them, which can be a barrier).


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Speaking for myself, I'd love to see your implementation. In particular, your flow control (PWM pump control and flow meters) would be fascinating to see. I'm thinking about doing something similar, but have thought to piggyback off something like the HeaterMeter bbq pit controller. If the BBB can handle this all on its own, all the better for simplifying the development.
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