A PiSugar2 battery designed only for Raspberry Pi Zero is employed that connects to the GPIO, but still leaves full access to pins and can be stacked with other HATs. It features a built-in RTC module so the Raspberry Pi can be programmed to turn on only when needed. Google Calendar data is downloaded once a day and transmitted to Waveshare's 12.48 "tri-color e-Ink display.
Credit: Speedyg0nz Speedyg0nz has developed a custom Python script to extract events by Google Calendar, which takes care of formatting the data according to a predefined layout that is updated on the e-Ink display. Since this is an e-Ink panel, the calendar will always remain visible so the Pi can be turned off to save power. According to Speedyg0nz, this setup allows the PiSugar2 battery to last around 3-4 weeks on a single charge. To keep track of the charge level, a small battery indicator has been added in the upper corner of the calendar display.
In case you are interested in replicating the project, Speedyg0nz has shared a complete development guide on GitHub . Today we also talked to you about another interesting cyberpunk themed device, which uses Raspberry Pi 4 and an old audio cassette player to create a spectacular cyberdeck. For more details, we advise you to read our previous dedicated article.