This week we are committing to a semester project for week 8, and by golly have I committed. Last week I mentioned in class that I was thinking about building a remote temperature/motion sensor that plugs into a wall outlet and can interface with other wireless devices such as smart thermostats or smart air vent. This serves a variety of uses:
- The sensors produces data about the temperature of a room, helping residents pinpoint temperature imbalances that impact comfort in particularly warm or cold months.
- Because it tracks presence through motion, it can also relay information to a smart thermostat or smart vent regarding room or home occupancy, helping those smart devices automatically reduce their output or turn off entirely to conserve energy.
#2 is particularly salient for me as I regularly forget to turn down or off my thermostat.
Here is what I am thinking for the main components:
PIR sensor – $12.99 – for tracking motion/presence
Temperature sensor – $2.38
Meshbee open source Zigbee module – $19.90
120 AC adapter built in – still sourcing this
Custom built, 3D printed enclosure
I have to finish sourcing my parts, particularly the AC adapter and get to work prototyping on a breadboard. Luckily, next week is spring break, so there will be slightly less pressure from other classes.
After looking into it a bit, I’m not feeling very confident about building an AC plug into the project. Switching to AA batteries.