Digital Thermostatic Beer Refreshment Regulator

Step 3 The cracking the code!!!

This was definitely the most difficult part for me..... writing the code. There are a few similar projects out there that I originally borrowed some code from to get me started. Most of it was fairly easy to understand, but some I had no idea what it did or said. I'm an entry level Arduino programmer so I spent a lot of time banging my head against the wall trying to figure out everything. Software is not my strong point so I had a bit of help from the Arduino community to finally get something that works well and was still easy to understand.

Just open up the text file with the code, copy it into the Sketch software and upload it to your Arduino!
I made a lot of comments in the code for me to understand what is doing what, feel free to mod it to make it better if you can.... I dare you!! (then send me the code.. hehe!)

You might want to adjust the turning ON/OFF lines depending on how warm or cold you would like your beer to be. I have it set between 1 and 4 Celsius... which is between 35 and 40 degrees Fahrenheit, because the beer inside the keg is about 5 degrees Far. warmer than the fridge.

If you are adventurous and good with C than you could write a neat Celsius to Fahrenheit conversion for me since my formula is not the greatest.

- I plan to rewrite the temperature reading section to take an average of readings over a few second range to get a more accurate temperature output, but for now it works fine.

Comments

[etscheid]

For Fahrenheit, try changing:
temp = lm35_val;
to:
temp = (lm35_val*1.8)+32;

[silverHalo]

Thanks for the tip!
I recently pulled out this project and started rewriting the code for better temp sampling and stability. I started home brewing recently and have need to have my beer fermenting at precise temperatures....I hope to have the updated code posted soon.