Soil moisture (humidity) measure system

   A nice and interesting gadget for Arduino board is soil moisture sensor, who can buy from Sparkfun,

ebay, aliexpress, banggood, etc.

   For last version schematic is:

   This version has 2 outputs, one analogical and one digial. If value of humidity is bigger than reference led D2 is on:

   I use a LCD1602 with i2c interface with a Arduino Mega (ADK) board and my test schematic is:

   I write a sketch named lcd1602_i2c_soilhumidity_ver0.ino put on my github channel:

   If sensor has probe in the air:

and if I put wet fingers:

  I made a small movie named soil humidity measure system on alphanumerical lcd display

and than I put a clone Arduino Uno board:

and made new movie, named soil humidity measure system on alphanumerical lcd display (2)

   Next step was to I use a Arduino Leonardo:

and a movie named soil humidity measure system on alphanumerical lcd display (3)