What Happened in March 2022
No ML/DS work this month. But I am beginning to get interested in microscopy, so…
Hardware hacking
-
Does it count as hardware hacking if it’s all software? A question for the ages. Anyhow: set up motion on the Raspberry Pi running the birdhouse camera. Set up a cron job on the Pi to copy the captured movies back to my home machine. Set up a cron job on my home machine to make a gallery out of it using PiGallery 2, which is just what the doctor ordered.
-
The weather station had been saying for a while that my in-laws' place was getting 14m of rain per day, which seemed excessive. Took a look at that, and broke readings from the anemometer as well.
(╯°□°)╯︵ ┻━┻
Dug more and discovered that the connector between those two pieces of equipment and the Cat5 cable (ask your parents, kids) had rusted. Soldered up a replacement and we were back in business. -
A friend of mine (hi Matt!) gave me an OBD bluetooth dongle to try on the car. I spent a truly stupid amount of time trying to query it with Python, which led me into Bluetooth Hell. I love Linux but OMG sometimes it’s the worst.
-
Set up an MQ135 to try and read CO2 levels at home. Getting mixed results, which seems to be par for the course. A collection of links in no particular order:
- https://hackaday.io/project/3475-sniffing-trinket/log/12363-mq135-arduino-library
- https://blog.robberg.net/mq-135-arduino/
- https://www.codrey.com/electronic-circuits/how-to-use-mq-135-gas-sensor/
- https://github.com/Phoenix1747/MQ135
- http://davidegironi.blogspot.com/2014/01/cheap-co2-meter-using-mq135-sensor-with.html
- https://circuitdigest.com/microcontroller-projects/interfacing-mq135-gas-sensor-with-arduino-to-measure-co2-levels-in-ppm