BrewPi Help

[DeadFall]

So I've finally ended 15 months of procrastination (believe me, I'm an expert procrastinator) and put my brewpi together. It's currently slowly ramping down a stout to 4 ready for kegging and I wish I'd got my backside into gear earlier as I'm pretty impressed with it.

All my pid values are the defaults and one thing I've noticed is that after a cooling cycle the fridge will slowly warm up until it's warmer than the beer by about 1c and then another cooling cycle will kick in. The profile is performing a slow ramp down of temperatures to bring a stout down to 4c to help clear it ready for kegging. Is this normal? I'd expect a cooling cycle to start just before it reaches the beer temperature.

[Aleman]

Wait until the algorithm learns it's parameters

[Aleman]

But yeah that is normal for a ramp down

[DeadFall]

Thanks. I'll be patient

[ciderhead]

When it settles down you get silly control.

[beerbeerbeer]

Does anyone know where i can find a simple explanation/list of what ill need to buy/do to turn my raspberry pi into a brewpi?

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[aamcle]

Have a look here :-

http://www.homebrewtalk.com/showthread.php?t=466106


Aamcle

[DeadFall]

For the beer temperature probe I ended up using red silicon ones fro the netherlands. They're more expensive, but they'll actually fit in the thermowell. The black ones from china aren't always 6mm like they say (I bought 3, one was 6.2, one was 5.9 and one was 7mm). The 5.9 will only fit in as far as the black cover. The other 2 won't fit in at all.

http://www.ebay.co.uk/itm/DS18B20-Water ... G3gG9-9wBw

[beerbeerbeer]

Thanks guys thats really helpful. Ive ordered some bits and pieces! Do you have a link to the thermowall youre using?

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Edit- got one on brewbuilder...

I heat my fv with a heated tray- what would this mean for the position of my second temp probe? Or would i need to change to heating the space in the chamber rather than the fv directly?

[AnthonyUK]

Thanks guys thats really helpful. Ive ordered some bits and pieces! Do you have a link to the thermowall youre using?

Just a heads up. You might be lucky using those cheapy 2-channel relay boards but they can cause problems especially on 240v. The 120v in US doesn't seems to be as bad but if you find your Brewpi works fine until you want to control the fridge and heater then look at using 2x SSR which are around £5 each and what the original Brewpi kits used.

[beerbeerbeer]

Cheers anthony. Do you have a link?

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[themadhippy]

to control the fridge and heater then look at using 2x SSR

heater yes,fridge no as some ssr's cant cope with inductive loads like fridge compresor motors

[AnthonyUK]

Cheers anthony. Do you have a link?

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These are the ones that were used and are still sold by the Brewpi project so should be fine even on a fridge.
40a should be enough to cope with the inrush current.

https://www.aliexpress.com/item/PQLYT-1 ... 29633.html

[beerbeerbeer]

For the beer temperature probe I ended up using red silicon ones fro the netherlands. They're more expensive, but they'll actually fit in the thermowell. The black ones from china aren't always 6mm like they say (I bought 3, one was 6.2, one was 5.9 and one was 7mm). The 5.9 will only fit in as far as the black cover. The other 2 won't fit in at all.

http://www.ebay.co.uk/itm/DS18B20-Water ... G3gG9-9wBw

Hi Deadfall, i got the same probe as you. Do you know which wire is which?

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[beerbeerbeer]

Also does anyone know whether any of the components get hot?

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