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Maximilian Seesslen, 23.04.2024 15:11

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h1. Wiki
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4 soil moisture Sensors can be connected to the board.
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The sensors can be evaluated one after the other.
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With shrinking hose on the sensors, the values look quite stable.
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Each sensor needs it calibration according to the type and cable.
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Air- and Water-Values are needed.
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The reported value is promil; 0=Air and 1000=Water
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In raw mode, values are send in Hz, in normal mode, its send as permil.
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Cordyceps should also plot raw values in order to see if values are stable.
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Change mode automatically? only show Hz in a field.
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TDT-Commands:
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* Raw
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* Calibrate dry
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* Calibrate water
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* change sensor
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Calibration procedure:
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* set to calibration via command
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* Calibrate dry via command
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* Calibrate water via command
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* Reset via command
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* Temperature? check warm water
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Measuring time
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Measure over a long time may remove noise and smoothen the values.
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But too much noise will already provide wrong measurements.
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So the time should be small. Hardware noise should be detected.
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This was already done long time ago.
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Just connecting Mainswitch near sensemux does help a lot reducing the noise.
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So ferritbeat may not help but there are already.