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Tilt Digital Hydrometer

I’m a gadgeteer at heart, and am always looking at another way to do something. If you follow any of my posts, you’ll see that I’ve built my own brewstand, my own mashtun, carboys, and temperature controllers. I’ve also purchased other devices such as the edrometer.

My latest aquisition is the Tilt Digital Hydromemter, a self-contained bluetooth-enabled digital hydrometer. It’s meant to be simply dropped into your carboy prior to adding yeast, and with the aid of IOS or Android devices you can constantly monitor and save the fermentation process to the cloud.

I had to have one…

Mine arrived, and I immediately set about testing it. I don’t have a spare IOS or Android device laying about, but I do have a bunch of credit-card-sized computers (think Raspberry Pi or Odroid), and I’m fairly proficient with programming, so I thought I’d give it a stab.

I grabbed a raspberry Pi Model 2, a compatible Bluetooth adapter, and a copy of the latest Raspbian Lite image. I burned the image to a SD card, logged in via ssh as root, and added what I thought was the appropriate software:

I reconfigured the SD card ( a 4GB card in this case) to use all available space, and started.

 

Bluetooth Setup

I wrote some software in php which is available from my github site, and setup the RPi. As a test, I made a solution of dextrose and water, added a wine yeast, and dropped in the Tilt. Here’s the resulting graph:

Tilt Test

There were a couple of glitches along the way, but overall, I’m very happy with the results.

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