How to use raspberry pie and low-power monitors to track your family schedule
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Hardware
The project started as a holiday project, so I tried to make use of as much old stuff as possible. Including one that has been idle for too long raspberry pie 2. Since I don't have an e-ink screen, I need to buy one. Fortunately, I found a vendor that provides open source drivers and examples for screens that support raspberry pie, which are connected using the GPIO port.
My family also wants to switch between different calendars, so some form of input is needed. Instead of adding a USB keyboard, I chose a simpler solution and bought a keyboard similar to the 1x4 size described in this article. This allows me to connect the keyboard to some GPIO ports in the raspberry pie.
Finally, I need a picture frame to accommodate the entire setting. Although the back looks a little messy, it can get the job done.
Calendar internals
Software
I took inspiration from a similar project and started writing Python code for my project. I need to get data from two places:
Weather information: obtained from OpenWeather API
Time information: I intend to connect to a calendar running on my home server using the CalDav standard
Because I had to wait for some parts to arrive, I used a modular approach to input and display, so I could debug most of the code without hardware. The calendar application needs a driver, so I wrote a Pygame driver to run it on my desktop.
The best part of writing code is the ability to reuse existing open source projects, so it's easy to access different API. I can focus on designing the user interface, which includes everyone's weekly calendar and everyone's calendar, as well as allowing the use of a keypad to select a schedule. And I took the time to add some additional features, such as a custom screen saver for special days.
E Ink calendar screensaver
The final integration step will ensure that my calendar application will run at startup and is fault tolerant. I used a basic raspberry pie system image and configured the application to the systemd service so that it could run in the event of a failure and a system restart.
After all the work, I uploaded the code to GitHub. So if you want to create a similar calendar, you can view it at any time and restructure it!
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