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inki as display for home automation

A project log for inki - low power wireless epaper device

compact, energy-efficient, battery-powered system for ePaper-based display of information gathered via Wi-Fi

casparcaspar 08/14/2025 at 18:200 Comments

inki can be used to display interesting accessible via wifi, as for instance from home automation systems. In this example I implemented a query for ccu-historian (https://github.com/mdzio/ccu-historian) that is based on the "homematic" system. In the image below the large / 7.5" version of inki displays the temperature of the last 24 hours in our garden. Yes, it was a very hot day!  

The operation principle, the hardware and most of the firmware are the same as in the desktop sharing application: inki wakes up at user defined intervals, and in this case queries the raspberry pi running ccu-historian. Thanks to the very well documented API of ccu-historian (https://github.com/mdzio/ccu-historian/wiki#autor-und-lizenz) the data is readily available in the form of a JSON container that is interpreted by the pico. At each wake-up interval the data is updated and plotted - in the example above you simply get a plot of the temperature of the last 24 hours. The possibilities  extend to all the data logged in the years it is running at our home, and not only the temperature. 

This was another example how to use the device - maybe you have ideas for more? 

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