This is Ranjib, author of reef-pi project. This is a follow-up email, with some details about the project. But before I jot down the details, I just want to express my gratitude to Lady Ada, You and the rest of the adafruit crew. My adafruit order history represents my learning of electronics :-). Being in Adafruit’s show n tell, was a long due homage.
reef-pi is a 2.5-year-old project aimed at providing a modular, affordable and opensource (open hardware) reef tank controller. reef-pi uses Raspberry Pi and few ancillary adafruit components (ds18b20 sensor, pca9685 breakout board, uln2803 mounted perma protoboards etc) to iteratively build a full-fledged controller capable of:
Equipment control: on-demand and timer based control of AC 110V equipment (pump, skimmer etc).
Dusk to dawn light cycle simulation: Using pwm (pca9685)
Temperature control (ds18b20 for sensing) to keep temperature at 78F.
Water level control (using photo electric water level sensor) to keep salinity at 1.025 (specific gravity)
Camera : Periodic photo shoots using pi camera and streaming video using motion software. Useful when we are on vacation and keep a tab on our tank
Doser: Dosing trace elements, Calcium and ph buffers using peristaltic pumps (powereed by l293d+pwm)
Email and text message alert when things go south. A comprehensive in-software dashboard as well as data emission to adafruit.io for external monitoring.
reef-pi is written in go (backend) and react (frontend), runs entirely on Pi (including zero), relatively efficient (a nano tank, which are under 30G can be run on 30% cpu & memory footprint), has comprehensive tutorials (build guides), a small community of builders (there are around 40+ documented reef-pi builds in reef tank related forums across US, UK, Australia and South Africa). I presented reef-pi last year’s maker faire (here in bay are), and received the blue ribbon (I’ll be presenting it again, this weekend during 2018 Bay Area Maker faire). reef-pi the project itself has an ongoing thread is reef2reef (the largest reef tank forum) and now its the highest viewed thread in the DIY section, that thread is the primary point of support and the most up to date place to get information about reef-pi, while the website reflects the well-tested guides against major release.
It’s all free and opensource (contents are all under CC , software are all under apache 2). Learn guide coming soon maybe!
We are angry, frustrated, and in pain because of the violence and murder of Black people by the police because of racism. We are in the fight AGAINST RACISM. George Floyd was murdered, his life stolen. The Adafruit teams have specific actions we’ve done, are doing, and will do together as a company and culture. We are asking the Adafruit community to get involved and share what you are doing. The Adafruit teams will not settle for a hash tag, a Tweet, or an icon change. We will work on real change, and that requires real action and real work together. That is what we will do each day, each month, each year – we will hold ourselves accountable and publish our collective efforts, partnerships, activism, donations, openly and publicly. Our blog and social media platforms will be utilized in actionable ways. Join us and the anti-racist efforts working to end police brutality, reform the criminal justice system, and dismantle the many other forms of systemic racism at work in this country, read more @ adafruit.com/blacklivesmatter
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.