Pretty stoked about my recent orders from the glorious interweb-of-stuff yesterday. Because, obviously, five Raspi’s are never enough for one coder.
Raspberry Pi Zero W
w00t. It’s a single-core version of, say, the Raspberry Pi 3 as if it were stolen, driven to a chop-shop in east Los Angeles and then people ripped off things like the RJ-45 port, the four full-sized USB ports, the header, half the RAM, etc. So it’s definitely stripped-down by comparison. Looks like the HDMI connector and the two USBs are now their tinier counterparts. I don’t see an audio jack. It still has Bluetooth.
The ‘W’ model (up from the Zero) now includes embedded wi-fi so this ought to be killer. Best of all, it only costs $10 compared to $35 for the Raspi3. Too bad it’s twice the price of the Zero, however. And at 2.6″ x 1.2″ it’s smaller than the ones I’ve had to-date.
What will I do with this? It may very well go into the aquarium project I’m working on.
NeoPixel Quarter-Ring 60 LEDs
I also ordered four quarter rings of NeoPixel(s) to build a lighting rig for the ecosystem-pi project.
The intention is to apply realistic lighting to a closed-system aquarium project throughout the day, adjusting the total lighting to compensate for the measured CO2 levels inside. Basically, the more light, the more plant growth, the more O2 produced and the more CO2 consumed in the process. There becomes a point where too much CO2 is bad for the shrimp so you don’t want to stress them out. And then too little CO2 stresses out the plants.
Digital CO2 Sensor
I was able to find a CO2 sensor for the Arduino which could be tweaked for use in a Raspberry PI project. This particular model also includes relative humidity and temperature for better logging.
So far—since I don’t have any sensors, LED lights and such yet—I’m stuck with the GUI design for the interface at this point and making sure that the shrimp are happy.
Everything in the interface is mocked-up right now but it ought to be fun to get the Raspberry talking to the sensors and adjusting the lighting from programmatic control. A fair bit of research has been done so far in the areas of aquarium and plant health.
But the two shrimp seem happy and have cleaned completely the two plants of their week’s worth of algae in three day’s time.