Parenting Style mode selector complete and integrated with moisture sensor

The mode selector is now complete! The button switches through the three LEDs (modes). After five seconds, the LED fades away to a dim setting so that we can conserve power in the long run.

Cleaned-up LED and pushbutton system.

The last step will be to clean up the code (for modularity).

Arduino code for the LED system integrated with the moisture sensor reading is given below:

//initialize constants
const int buttonPin = 2;
const int LED1 = 11;
const int LED2 = 10;
const int LED3 = 9;
const int moistureSensor = 0;
const unsigned long deBounceDelay = 200;
const unsigned long moistureDelay = 5000;

//initialize variables
int buttonState = 0;
int lastButtonState = 0;
int mode=1;
int fadeValue;
int moistureReading = 0;
unsigned long deBounceTimer = 0;
unsigned long moistureTimer = 0;
unsigned long startTime;

//set-up interrupt

void setup() {
  //initialize each of the three LED pins as outputs
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
 
  //initialize the pushButton pin as an input
  pinMode (buttonPin, INPUT);
 
  //initialize serial communication; mid-range data rate 9600 bps
  Serial.begin(9600);
 
  //attachInterrupt(0, off, RISING);
}

void loop() {
  buttonCheck();
  switch (mode) {
    case 1:
      off();
      digitalWrite(LED1, HIGH);
      startTime = millis();
      fadeValue = 255;
      while(mode==1) {
        buttonCheck();
      readMoisture(); 
        if((fadeValue>55)&&((millis()-startTime) > 5000)) {
          for(fadeValue = 255; fadeValue >=50; fadeValue -=5) {
           analogWrite(LED1, fadeValue);
          delay(30);
          }
        }
      }
      break;
     
    case 2:
      off();
      digitalWrite(LED2, HIGH);
      startTime = millis();
      fadeValue = 255;
      while(mode==2) {
        buttonCheck(); 
        readMoisture();
        if((fadeValue>55)&&((millis()-startTime) > 5000)) {
          for(fadeValue = 255; fadeValue >=50; fadeValue -=5) {
           analogWrite(LED2, fadeValue);
          delay(30);
          }
        }
      }
      break;
     
    case 3:
      off();
      digitalWrite(LED3, HIGH);
      startTime = millis();
      fadeValue = 255;
      while(mode==3) {
        buttonCheck(); 
        readMoisture();
        if((fadeValue>55)&&((millis()-startTime) > 5000)) {
          for(fadeValue = 255; fadeValue >=50; fadeValue -=5) {
           analogWrite(LED3, fadeValue);
          delay(30);
          }
        }
      }
      break;
  }
}

void buttonCheck() {
  buttonState = digitalRead(buttonPin);
 
  if (!buttonState&&lastButtonState&&(millis()-deBounceTimer)>deBounceDelay){
    mode++;
    if(mode>3)mode=1;
    lastButtonState = buttonState;
    deBounceTimer = millis();
  }
 
  if (buttonState&&!lastButtonState&&(millis()-deBounceTimer)>deBounceDelay){
    lastButtonState = buttonState;
    deBounceTimer = millis();
  }
}

void readMoisture() {
  if ((millis()-moistureTimer)>moistureDelay){
    moistureReading = analogRead(moistureSensor);
    moistureTimer=millis();
    Serial.print("moisture sensor reads ");
    Serial.println( moistureReading); 
}
}
 

void off() {
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
}