Introduction: Intel® Edison Hands-on Day 8: Guardian of Eden

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Would you like to provide a comfortable environment for your plants and flowers in your garden? Are they thirsty for the time being? Through a temperature sensor, a soil humidity sensor, and a LCD display, you can easily get the state of your soil.

Component Required

Step 1: Connection

  • LCD Keypad Shield for Arduino → Plug onto the Intel® Edison with Arduino Breakout Kit
  • LM35 Analog Linear Temperature Sensor → Analog Pin 1 (note the first left connection in the bottom right corner. Analog Pin 0 is occupied by keyboard)
  • Soil Moisture Sensor → Analog Pin 2

Step 2: Coding

After uploading the sketch, the LCD will show the temperature and humidity, as well as the soil humidity condition.

// Guardian of Eden
#include 

LiquidCrystal lcd(8, 9, 4, 5, 6, 7);     // Initiate the LCD display with the
numbers of the interface pins
int TemperaturePin=A1;      //The pin number of the temperature
sensor
int HumidityPin=A2;         //The
pin number of the humidity sensor
void setup() {
 
lcd.begin(16, 2);  // set up the LCD's
number of columns and rows
}
void loop() {
  int
temperatureValue;     //store the analog
value from temperature sensor
  int
humidityValue;        //store the analog
value from humidity sensor
  int
temperature;          //store the real
temperature.
 
temperatureValue=analogRead(TemperaturePin);    //read the temperature sensor
 
humidityValue=analogRead(HumidityPin);          //read the humidity sensor
 
temperature=(500 * temperatureValue) /1024;     //Convert the analog value to real
temperature.
  //LCD shows
the temperature
 
lcd.setCursor(0, 0);    // set the cursor to column 0, line 0
 
lcd.print("T:");
 
lcd.print(temperature);
 
lcd.print("C");
  //LCD shows
the humidity of the soil
 
lcd.setCursor(0, 6);    // set the
cursor to column 6, line 0
 
lcd.print("H:");
 
lcd.print(humidityValue);
  //Show the
situation of the soil
 
lcd.setCursor(1, 0);    // set the
cursor to column 0, line 1
  if
(humidityValue<300) {
   
lcd.print("Soil: Dry");
  }
  else if
(humidityValue>=300 && humidityValue<700){
   
lcd.print("Soil: Humid");
  }
  else{
   
lcd.print("Soil: Water")
  }
  delay(500);
}