I’ve recently set up this project to control temps in a fridge. I was lucky enough to have everything barring the fridge and heater to build a legacy build for the cost of a project box and thrermowell and it’s working beautifully… At the time the website was a little confusing as it still referenced the arduino despite the project having moved on so I googled around and threw.
I’ve now got my head around where the project is at the moment and am pretty excited about where it’s headed. Elco and the team have done a great job and i’m looking forward to building a full home brewery setup around the new platform when it’s available again and I’ve decided on the end game.
Anyway onto my query. I’ve been lucky enough to be offered a very large 6’+ upright fridge for £20 and although i’ve not seen it yet am confident I can get 2 x fermentation vessels in there one above the other. I’m planning to add a 2nd uno off the same pi (i’ve got that side of things covered I think) for the time being but will likely replace all of that once multi chamber is launched and I get started on the brewery.
I’m wondering how best folks think to wire sensors etc for this setup as it’s currently an unsupported deployment? I was hoping someone may have done something similar. I’m thinking have one of the beers with a thermowell and a chamber temp sensor as normal and that should at least keep both beers pretty stable at the set temp even if not spot on. It’s a lot better that the 8-12° my garage sits at at the moment. I’m not too worried about ramping temps or crash cooling at this stage and could always move a brew to my other chamber for this.
I’d also wondered about keeping the fridge permanently under my target temp and using heat mats under each beer with a second sensor with an arduino and brewpi process for each beer but not sure if this would work at all and it’s obviously pretty inefficient as the heat/cool would fight.
Are there any other options i’m missing with this setup or any pointers for which beer to monitor. heater will be tubular and at the bottom. Any thoughts much appreciated.