Soil moisture control in 4 zones

   For a real garden you need a suystem for soil moisure control in more zones, so, I made a siystem for 4 zones.
   Schematic is simple:

   I write a sketch for this who can download from my channel Github !
   Eatch soil sensor is powered few seconds when measure humidity after that is powerred off (tens of seconds):
- first sensor powered:

- second sensor is powered:

- third sensor is powered:

- fourth sensor is powered:

   You can see two movies:
- soil moisture control in 4 zones using Arduino

- soil moisture control in 4 zones using Arduino (2)

30.07.2016

   Because are 2 version of relay module:

- with normal control when if you give 5V at input module relay relay is energized and coil is powered, normal open contact is close 

- with negative control (inversed control) when give 5V at input module realy is cut the power at coil, normal open contact is open ...

  So, I put a jumper for easy use of relay modules, when jumper is open (in air) it use normal control and when jumper is close it use negative control.

  Schematic is simple just add jumper:

and must use sketch named lcd1602_i2c_soilhumidity_ver4.ino !

Soil moisture/humidity control system (part 2)

   In previous article I present you a simple metode for read and control soil humidity (soil moisture) and for protect the probe of soil moisture sensor with intermitent power of sensor (just few seconds when measure process - at 5 second whem pump is on for not flooding and at few minutes wheh humidity is ok).
   Now, I put a inportant indication: time elapsed since the last watering process (maximum 999 hours 59 minutes, using millis() soubrotine, see article from https://www.arduino.cc/en/Reference/Millis).

   For that, I use a sketch like lcd1602_i2c_umditatesol_ver2.ino just change texts in english.
   I use same schematic:

   I made 2 movies:

- soil moisture control system using Arduino (2)

- soil moisture control system using Arduino (3)

   

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)