Crit 2: Sound

This project uses a color sensor (TCS34725) to determine whether or not a banana is ripe. The sketch includes a button for the user to press when ready to evaluate the banana. One series of beeps indicates the banana is ready to eat, another series indicates the banana is not ready to eat. Since there is a data smoothing component, there is also a noise that identifies when new readings are dramatically different from the average reading, and notifies the user that the sensor is still calculating.

#include <Wire.h>
#include "Adafruit_TCS34725.h"

/* Example code for the Adafruit TCS34725 breakout library */

/* Connect SCL    to analog 5
   Connect SDA    to analog 4
   Connect VDD    to 3.3V DC
   Connect GROUND to common ground */

/* Initialise with default values (int time = 2.4ms, gain = 1x) */
Adafruit_TCS34725 tcs = Adafruit_TCS34725();

//* Initialise with specific int time and gain values *
//Adafruit_TCS34725 tcs = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_500MS, TCS34725_GAIN_1X);

int speakerpin=8;
int buttonpin=2;


// data smoothing
const int numReadings = 10;

int readings[numReadings];      // the readings from the analog input
int readIndex = 0;              // the index of the current reading
int total = 0;                  // the running total
int averageb = 0;                // the average


void setup(void) {
  Serial.begin(9600);
  for (int thisReading = 0; thisReading < numReadings; thisReading++) {
    readings[thisReading] = 0;
  }

  pinMode(buttonpin,INPUT_PULLUP);

  if (tcs.begin()) {
    Serial.println("Found sensor");
  } else {
    Serial.println("No TCS34725 found ... check your connections");
    while (1);
  }

  // Now we're ready to get readings!
}

void loop(void) {
  uint16_t r, g, b, c, colorTemp, lux;

  tcs.getRawData(&r, &g, &b, &c);
  // colorTemp = tcs.calculateColorTemperature(r, g, b);
  colorTemp = tcs.calculateColorTemperature_dn40(r, g, b, c);
  lux = tcs.calculateLux(r, g, b);


    // subtract the last reading:
  total = total - readings[readIndex];
  // read from the sensor:
  readings[readIndex] = b;
  Serial.println(b);
  // add the reading to the total:
  total = total + readings[readIndex];
  // advance to the next position in the array:
  readIndex = readIndex + 1;

  // if we're at the end of the array...
  if (readIndex >= numReadings) {
    // ...wrap around to the beginning:
    readIndex = 0;
  }

  // calculate the average:
  averageb = total / numReadings;
  // send it to the computer as ASCII digits
  Serial.println(averageb);
  delay(1);        // delay in between reads for stability



  Serial.print("Color Temp: "); Serial.print(colorTemp, DEC); Serial.print(" K - ");
  Serial.print("Lux: "); Serial.print(lux, DEC); Serial.print(" - ");
  Serial.print("R: "); Serial.print(r, DEC); Serial.print(" ");
  Serial.print("G: "); Serial.print(g, DEC); Serial.print(" ");
  Serial.print("B: "); Serial.print(b, DEC); Serial.print(" ");
  Serial.print("C: "); Serial.print(c, DEC); Serial.print(" ");
  Serial.println(" ");
delay(100); delay(100);   delay(100);   

  int buttonvalue=digitalRead(buttonpin);
  Serial.println(buttonvalue);

  if (buttonvalue == HIGH) {
    Serial.println("button is pressed");
    if (averageb>=20){
      Serial.println("not ready");
      tone(speakerpin,293.66,1000);
      delay(1000);
      noTone(speakerpin);
      delay(500);
      tone(speakerpin,293.66,1000);
      delay(1000);
      noTone(speakerpin);
    } else if (b-averageb>=10) {
      Serial.println("calculating");
      tone(speakerpin,200,500);
      delay(500);
      noTone(speakerpin);
      delay(500);
    } else {
      Serial.println("ready to eat");
      tone(speakerpin,329.63,250);
      delay(250);
      noTone(speakerpin);
      delay(250);
      tone(speakerpin,311.13,250);
      noTone(speakerpin);
      delay(1000);
      tone(speakerpin,329.63,1000);
      noTone(speakerpin);
      delay(1000);
      }

  } else {
    Serial.println("button is not pressed");
  }





}