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MagInkCal
E-Ink Magic Calendar that automatically syncs to Google Calendar and runs off a battery powered Raspberry Pi Zero
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
This one might be cheaper: https://github.com/zephray/NekoCal
...from the same guy who did this: https://news.ycombinator.com/item?id=16140284
i bought the 6" display from eink.com to build a small personal art project - an infinite scrolling procedurally generated landscape based on this project - https://github.com/LingDong-/shan-shui-inf
A few gotchas:
1. some of these eink boards are hard to procure as a consumer. the vendors want you to be a company
2. the driver boards are separate and sometimes have windows software (vs easy to use rasp-pi software)
3. support is often difficult or from the OEM so english-language communication can be difficult.
I wrote a similar project that generates Gameboy art from a collection of roms on a Raspberry pi and displayed them on a 8 color E-Ink display.
https://github.com/crzysdrs/slate
Google Calendar provides a calendar URL which might be more convenient.
Used it in this thing: https://github.com/lawik/calendar_gadget
downside is that you fight the kindle os in certain aspects.
see for example: https://github.com/Neelakurinji123/kindle-weather-display