| Foxtemp 2016 | Created: 11.07.2016 20:34 |
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A few years ago, I constructed my DS1820toUSB
device for attaching a temperature sensor to USB. This year, it was
time for a new generation: The
Foxtemp2016.
The main trigger for that was that I wanted to measure humidity in
addition to the temperature. I've also since experimented with
the home automation software FHEM.
While there are a lot of sensors for commercial weather stations
that can be received by FHEM, it's always a bit of a gamble: Nobody
knows whether the manufacturer perhaps made minor changes to the
sensor that break its compatibility with FHEM, and even if that is
not the case, those things are usually extremely poorly documented,
so you don't know what accuracy they have. You'll also have to buy
what's currently available, so unless you buy all your sensors at
the same time, you'll usually end up with a whole zoo of different
sensors. The new features of Foxtemp2016 compared to DS1820toUSB are:
 Instead of constructing everything from scratch, this time I used premade parts: The microcontroller board that is the base for this is a JeeNode micro v3, and the sensor is on a Adafruit SHT31 breakout board. However, both are open hardware designs, so should they no longer be made, you could still make them yourself. Sadly, due to those premade parts this isn't nearly as cheap as a ds1820tousb, but that really wasn't a top priority for me. The data from the Foxtemp2016 devices can be received with the same JeeLink (V3) you'd probably use for receiving cheap commercial weather station sensors. You essentially just need to enable something when compiling the firmware for use with FHEM. A small module for making FHEM understand the data received is also included. You can find the build instructions and more pictures over in the Foxtemp2016 gitlab repository. |
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