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Soil Moisture Sensors:

NOTE - we will use these as an analog sensor

There was two main types of soil moisture sensors we considered; Capacitive or Resistive. 

 Capacitive or Resistive Soil Moisture Sensors 

We bought the capacitive sensors these ones: amazon link 

waterproofing info: 


 waterproofing tutorial 

 - we just ended up using clear nail polish and heat shrink tubes

Water Level Sensors (Float Switches)


NOTE - we will use these as an digital sensor: these are the type we got