Arduino code

Arduino.INO

#include <Servo.h>
#include <Wire.h>
#include "rgb_lcd.h"
rgb_lcd lcd;

const int numberOfPlants = 4;
const int noPlant = -1;  // index meaning no plant is being monitored

//controls the LCD backlight colour 
const int plant1R = 0;
const int plant1G = 0;
const int plant1B = 255;
const int zeroR = 0;
const int zeroG = 0;
const int zeroB = 0;
const int plant2R = 0;
const int plant2G = 255;
const int plant2B = 0;
const int plant3R = 255;
const int plant3G = 0;
const int plant3B = 0;
const int plant4R = 255;
const int plant4G = 0;
const int plant4B = 255;


const int waterSensorPin = A1;
const int buttonPin = 2;
const int servoPin = 5;
const int ledPins[numberOfPlants] = {12, 11, 10, 9};

// Moisture levels for the different plants.
const int moistureMinima[numberOfPlants] = {  0,   0,   0,   0};
const int moistureMaxima[numberOfPlants] = {195, 682, 750, 950};

Servo indicator;
int sensorValue = 0; // value read from the Soil Moisture
void setup() {
  lcd.begin(16, 2);
  Serial.begin(9600);
  pinMode(waterSensorPin, INPUT);
  pinMode(buttonPin, INPUT);
  for (int ledNo = 0; ledNo < numberOfPlants; ledNo++) {
    pinMode(ledPins[ledNo], OUTPUT);
  }
  indicator.attach(servoPin);
}

void loop() {
  // Which plant am I currently monitoring?
  static int whichPlant = noPlant;
  sensorValue = analogRead(waterSensorPin);

  // Switch to next plant on button press.
  if (digitalRead(buttonPin) == HIGH) {
    if (whichPlant != noPlant) {
      digitalWrite(ledPins[whichPlant], LOW);
    }
    ++whichPlant;
    if (whichPlant == numberOfPlants) {
      whichPlant = noPlant;
    } else {
      digitalWrite(ledPins[whichPlant], HIGH);
    }


  }
  if (whichPlant == noPlant) {
    digitalWrite(10, LOW);  
    digitalWrite(12, LOW);  
    lcd.clear();
    lcd.noDisplay();
    lcd.setRGB(zeroR, zeroG, zeroB);

  }
  if (whichPlant == 3) {

    digitalWrite(10, HIGH);
    digitalWrite(12, HIGH);
    lcd.setRGB(plant4R, plant4G, plant4B);
    lcd.clear();
    lcd.display();
    lcd.print("Swamp Plant");
    sensorValue = map(sensorValue, 0, 950, 0, 100);
    lcd.setCursor(0, 1);
    lcd.print(sensorValue);
    lcd.print("% Enough water");
    Serial.println(sensorValue);
    delay(500);  // crude debouncing
  }
  if (whichPlant == 2) {
    lcd.setRGB(plant3R, plant3G, plant3B);
    lcd.clear();
    lcd.display();
    lcd.print("Orchid");
    sensorValue = map(sensorValue, 0, 750, 0, 100);
    lcd.setCursor(0, 1);
    lcd.print(sensorValue);
    lcd.print("% Enough water");
    Serial.println(sensorValue);
  }
  if (whichPlant == 1) {
    lcd.setRGB(plant2R, plant2G, plant2B);
    lcd.clear();
    lcd.display();
    lcd.print("Sunflower");
    sensorValue = map(sensorValue, 0, 682, 0, 100);
    lcd.setCursor(0, 1);
    lcd.print(sensorValue);
    lcd.print("% Enough water");
    Serial.println(sensorValue);
  }
  if (whichPlant == 0) {
    lcd.setRGB(plant1R, plant1G, plant1B);
    lcd.clear();
    lcd.display();
    lcd.print("Cactus");
    sensorValue = map(sensorValue, 0, 195, 0, 100);
    lcd.setCursor(0, 1);
    lcd.print(sensorValue);
    lcd.print("% Enough water");
    Serial.println(sensorValue);
  }

  if (whichPlant != noPlant) {
    int sensorValue = analogRead(waterSensorPin);
    int position = map(sensorValue,
                       moistureMinima[whichPlant], moistureMaxima[whichPlant], 180, 0);
    indicator.write(constrain(position, 0, 180));
    Serial.println(sensorValue);
    delay(500);

  }
  // added 14-02 to make sure servo pointer goes back to start after reading last reading from waterSensor
  if (whichPlant == noPlant) {
    int sensorValue = analogRead(waterSensorPin);
    int position = map(sensorValue,
                       moistureMinima[whichPlant], moistureMaxima[whichPlant], 180, 0);
    indicator.write(constrain(position, 180, 180));
    delay(500);

  }





  //gemaakt door Sinan van Noppen
}