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Sodium hydroxide (NaOH) is a strong base.

I'm not so sure about the Inkbirds being clones of the Foteks. I have looked at them side-by-side powered by a 9V battery, and the Fotek (50DA) has a much stronger LED output than the Inkbird (40DA). Both were bought on Amazon Prime: Granted, the Fotek is the 50A version and the...

Here are some views inside of my main controller box: The box has an RPi3, a PermaProto Hat from Adafruit with 3 level shifter boards and an I2C realtime clock board. The level shifters work to raise the I2C, 1-wire and GPIO lines to 5V and provide some buffering. The I2C bus (the four...

Here's an example with three fermentors, two with Kolsch and one with Doppelsticke: The chest freezer here is being held at about 32F, and all three fermentors have completed their fermentation profiles and are just conditioning. Here's what the Doppelsticke profile looks like. I switched...

What size kettle and what size of batches can you do on this setup? Thanks...

This is what I'm doing as well. Having two plastic edges to potentially contaminate my wort is not worth it. Plus, it is much easier to handle. But I've also experienced some loss of yeast due to the packaging.

Jimmy: I've not seen this one. Open up an issue on the GitHub site and we'll work it out. Cheers... CraigMW

Cool! I'd love to hear how it works out for you.

I have two RPis running CellarWarden. One is on my wine cellar and that has been running for nearly two years, over the last year controlling the cooling unit. I have been using a second RPi with CellarWarden controlling my fermentation chamber/keezer for six months. I haven't run into any...

CellarWarden runs everything natively on the RPi (v.2 or 3 preferred), so no need for an Arduino or other microcontroller for each fermentation chamber. I do plan to eventually provide a driver to support communications with Arduinos and other microcontrollers so that it will be compatible with...

Here, I've zoomed in on the Sensors plot around the two temperature sensors monitoring the fermentor. Note that the lighter line is from the sensor between the Fermwrap and the carboy and the darker purple line is from the sensor in the thermowell. It's interesting that the darker line started...

This is the controller logfile for the keezer. This controller was set up to use hysteresis mode with a two degree hysteresis setting: Here is this same plot, just zoomed in to show what is happening with the controller. It is apparent that the keezer turns on when it reaches 34F (due to...

Here's the Sensors tab window for this fermentation showing fermentation of a Doppelbock. While I only have one fermentor in this example, I've done three simultaneously so far. This shows the Controller logfile demonstrating the profile I used for this fermentation (Doppelbock misspelled in...

Here's an example of my setup fermenting a Doppelbock. I have made a carboy wrap using Reflectix and a Fermwrap warmer. The Fermwrap is connected to an extension box to the main unit via a CAT5 cable and the 1-wire temperature sensors are also wired via CAT5 and connect to the extension box...

I haven't used CellarWarden for controlling glycol chilled fermentors, but there is no reason that it wouldn't work. You could set up motorized ball valves (connected via a relay board to the RPi) to accomplish this. In my case, I use a 15 cubic foot chest freezer as a dual use fermentation...

Can you get a water report from your local water company? If it's very hard water, there could be an issue. It would be worth reading up about how water can impact mash efficiency (fermentability) and flavor, as this can certainly be an issue. We have very hard water, and I ended up getting an...

Would this work? http://www.homedepot.com/p/Eaton-50-Amp-2-Circuit-Type-BR-Spa-Panel-with-Self-Test-2P-GFCI-BR50SPAST/206696172

I've just updated the client app to prevent deletion of Controller 0 since I noticed that doing so would result in some strange behavior. You can just run git pull from the command line in /home/pi/CellarW to institute this change.

Hmm. I just checked it right now on my system. If I disable the Active checkbox on any listed controllers, the LCD will only show the page 0 screen (e.g. DHT temp/humidity and onew1 temp). If this doesn't seem to work, maybe the controller configuration file got corrupted somehow. I suggest...

That sounds cool! I may need to do the same if I could ever build a collection. I use a cheap ultrasonic mister floating in a bucket of water in my wine cellar to keep my humidity stable at 70%, all controlled by CellarWarden. It works quite well for this.