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32 lines
1.3 KiB
Markdown
32 lines
1.3 KiB
Markdown
# water-counter
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Monitor a water meter with Arduino and infrared light sensor to capture counter value and consumption of water.
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The software consists of two parts:
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* Data acquisition part running on an Arduino Pro Mini. It controls the infrared light barrier, detects trigger levels and communicates with the Raspberry Pi over serial connection.
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* Data recording part running on a the Raspberry Pi. It retrieves the data from the Arduino over serial port and stores counter and consumption values into a round robin database.
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There is a blog in german language that explains use case and function: [Infrarot Lichtschranke mit Arduino und Raspberry Pi zum Auslesen des Wasserzählers](https://www.kompf.de/tech/watir.html).
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## Commands from host (RasPi) to Arduino
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* __D__ - retrieve and print raw data
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* __T__ - enter trigger mode and print trigger data (0/1)
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* __S__ _low_ _high_ - Set trigger levels (e.g. 85 90)
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* __C__ - Cancel data acquisition and enter command mode
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Arduino is in trigger mode upon start - Send __C__ to enter command mode
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## Schematics
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## Construction
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