I needed to have the perfect temperature control for my beer fermentation, there were pre built offers but all to expensive.

My controller also had to work from different locations so it had to be wireless.

I first thought about constructing my own system but why bother if there is already a solution. Thank you elco for this!

http://www.brewpi.com/

Homebrewtalk user fuzzewuzze simplified the build:

http://www.homebrewtalk.com/f258/howto-make-brewpi-fermentation-controller-cheap-466106/

And also the secondary Threads from day_trippr for the full build:

http://www.homebrewtalk.com/f258/how-brewpi-over-bluetooth-508151/

http://www.homebrewtalk.com/f258/how-brewpi-lcd-add-510036/

So let the fun begin:

 

Test build with Arduino Uno

brewpi_orig_1

 

Works perfectly

brewpi_orig_2

Now with the pro mini, i got scrambled output on my display so i shorted all the leads and added capacitors to the power source. No use.

brewpi_orig_3

After some testing i found that the cheap Chinese pro mini had the output 12 and 13 shorted. So with the other mini it worked.

Building the trough hole breadboard

Parts List:

Bluetooth-USB Module [Amazon][Ebay]
Bluetooth-Serial Module [Amazon][Ebay]
Arduino Pro mini [Amazon][Ebay]
Temp Sensor [Amazon][Ebay]
Display 20×4 [Amazon][Ebay]
Double Relay [Amazon][Ebay]
Rotary Encoder [Amazon][Ebay]
Shift Register 74HC595 [Amazon][Ebay]
Universal Board 5x7cm [Amazon][Ebay]
Raspberry Pi [Amazon][Ebay]
Raspberry Case [Amazon][Ebay]
USB Wifi Adapter [Amazon][Ebay]
8GB MicroSD Card [Amazon][Ebay]
10k Trimmer [Amazon][Ebay]
Male Headers [Amazon][Ebay]
Female Headers [Amazon][Ebay]
IC socket 16 Pin [Amazon][Ebay]
4x 0.1uF Capacitor [Amazon][Ebay]
1uf Capacitor [Amazon][Ebay]
3x 10k Resistor [Amazon][Ebay]
1k Resistor [Amazon][Ebay]
2k Resistor [Amazon][Ebay]
7805 DC-DC Converter [Amazon][Ebay]
2N3906 Transistor [Amazon][Ebay]

Front
brewpi_orig_4

Back

brewpi_orig_5

Some more Pictures

brewpi_orig_6

brewpi_orig_7

Testing

brewpi_orig_8

Another close up

brewpi_orig_9

Some more testing

brewpi_orig_10

I scavenged an old Cisco Linksys Router Case

brewpi_orig_11

Putting everything together

brewpi_orig_12

brewpi_orig_13

brewpi_orig_14

Final testing

brewpi_orig_15

brewpi_orig_16

 

With the Fermenters i am using, it is pretty difficult to add a thermowell so i just put the sensor on the outside and isolated it with some bubble wrap.

brewpi_orig_17

brewpi_orig_18

This works pretty well, i measured the temp differences and they were only about 0.1C apart.

If this Article was useful to you, please consider to buy me a Beer.

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