The reason for this project was to integrate the CAT-toilet "CATGenie120" into my smarthome and to make it possible to lock a toilet while an other one is cleaning.
The most important for me was:
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new board replaces the original one
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synchronice 2 or more CATGenies
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integration into my openhab2 smarthome control
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hot water for cleaning
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Using my own admixture to reduce smell
Design of the controll board:
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Arduino with WIFI (Genuino MKR1000)
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EEPROM for WEB-Page and cleaning programs (both can be uploaded)
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Real time clock (without power running for at least 1 day)
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Hardware watchdog
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RS485 Interface for syncronisation
THE HARWARE DESIGN AND THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND EXPRESSED OR IMPLIED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY.