I cleaned up the Python source code for the Intel Galileo temperature sensor I blogged about earlier this summer, and pushed the source up to my GitHub account. The code is very brute-force and make-do (it was written in a very short period of time during a very crazy semester and hasn’t been touched since) but I think it will be more useful online than sitting on my drives.

The temperature sensor is a TMP36 analog temperature sensor. I followed the directions at Adafruit to assemble a circuit and hook it up to my Galileo Board 2. I used the same circuit diagram as shown–the Galileo Board series and the Arduino shown are electronically compatible–although I added a 0.1uf capacitor between VCC and GND as suggested by a commenter at SparkFun and the TMP36 datasheet to cut down on noise. (No, I’m not sure this is necessary, but the capacitor was cheap and the resulting measurements seemed accurate within a degree or so. Maybe I should take some EEE classes next semester to find out what it’s actually doing?)

The daemon itself is written in Python 2 and runs under Yocto Linux (the Intel-provided full-sized Linux SD card image for the Galileo Board 2). A LSB script does a little configuration in /proc to give access to the analog input pins and then starts the daemon. The daemon listens on port 8080 for HTTP requests and serves up temperature data for the past 15 minutes, the past hour, the past day, and the past week, returning the data as a JSON feed that can be graphed by a library like MetricsGraphics.

Instructions for setting up the daemon are on the GitHub page. You’ll need the Galileo SD Card Image to install Yocto Linux. The newest version, 1.0.4 at the time of writing, is much smaller than the version I have. You made need to go to the old downloads page and download version 1.0.3 if the newest version does not have Python available.

In case you missed it, the feeds from the project can be seen in graph form here.