Wednesday, June 29, 2016

Soil moisture (humidity) control system

   Helpfull for home is a soil moisture control system, who can made easy with a Arduino development board.
   For tests I use a Arduino Mega board, alpahanumerical 1602 LCD with i2c interface, soil moisture module, but for real use must use relay module for control a wattering pump.
   I use sketch named lcd1602_i2c_soilhumidity_ver1.ino who can find at my Github channel.
   Soil moisture sensor is very chip
and has this schematic:
   My soil moisture sensor is not permanent powered with 5V because in timp probe sensor will be distroyed by electrocorrosion effects, so, I powered the sensor just few seconds at 5 seconds when pump is on for avoid flooding and at 5 minutes (in test I use 20 seconds) when soil is wet.
   I made a few years ago some tests with CMOS 4093 gates (see original article from  http://www.arduinotehniq.com/old/udare_automata/udare_automata_flori.htm) when I use this schematic whit permanent power of soil probe:
and after 3 months my stainess steel probe was corroded:
   So, I put a threshold value at 25% and I have 2 cases:
- when soil is wet, pump is off, measurements are made at long periods:
- when soil is dry, pump is on, measurement are made at 5 seconds for avoid floods:
   You can see these cases in a movie named soil moisture control system using Arduino

3 comments:

  1. While reading this blog you get the knowledge about the Soil moisture (humidity) control system. As we know Light Weight Deflectometer tests the quality of soil compaction in construction sites whereas Soil moisture control system check the humidity level of soil. Keep Sharing.

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