Wiki¶

4 soil moisture Sensors can be connected to the board.
The sensors can be evaluated one after the other.

With shrinking hose on the sensors, the values look quite stable.
Each sensor needs it calibration according to the type and cable.
Air- and Water-Values are needed.
The reported value is promil; 0=Air and 1000=Water

In raw mode, values are send in Hz, in normal mode, its send as permil.
Cordyceps should also plot raw values in order to see if values are stable.
Change mode automatically? only show Hz in a field.

TDT-Commands:

• Raw
• Calibrate dry
• Calibrate water
• change sensor

Calibration procedure:

• set to calibration via command
• Calibrate dry via command
• Calibrate water via command
• Reset via command
• Temperature? check warm water

Measuring time

Measure over a long time may remove noise and smoothen the values.
But too much noise will already provide wrong measurements.
So the time should be small. Hardware noise should be detected.

This was already done long time ago.

Just connecting Mainswitch near sensemux does help a lot reducing the noise.
So ferritbeat may not help but there are already.