Harmony in Chaos - Traditional Innovative Tea Ceremony 

Planned and Executed: Nathan Ynson and Korn Kijwattanapong 

Course: Interaction Lab (INTM-SHU 101) at New York University, Shanghai 

Credits : Andy Garcia, Angy He, FAB Lab, and IMA Fellows: For guidance and technical support.

Course Instructor/ Professor: Viola (Leqi) He 

Product Showcase at IMA Show, NYU Shanghai | 13 December 2024

Arduino:

#include <NewPing.h>

#include <Adafruit_NeoPixel.h>

// Ultrasonic Sensor Configuration

#define SONAR_NUM 3      // Number of ultrasonic sensors

#define MAX_DISTANCE 200 // Maximum distance (in cm)

// Neopixel Configuration

#define NUM_LEDS 60      // Number of LEDs per strip

#define PIN_STRIP1 8     // Pin for Neopixel Strip 1

#define PIN_STRIP2 9     // Pin for Neopixel Strip 2

NewPing sonar[SONAR_NUM] = {

  NewPing(3, 2, MAX_DISTANCE),

  NewPing(5, 4, MAX_DISTANCE),

  NewPing(7, 6, MAX_DISTANCE)

};

// Pins for piezo sensors and tilt switch

const int piezoPins[] = {A2, A4, A5};

const int tiltSwitchPin = 11;

int tilt = 1;

// Initialize Neopixel Strips

Adafruit_NeoPixel strip1(NUM_LEDS, PIN_STRIP1, NEO_GRB + NEO_KHZ800);

Adafruit_NeoPixel strip2(NUM_LEDS, PIN_STRIP2, NEO_GRB + NEO_KHZ800);

// Variables for flashing effect

unsigned long flashStartTime = 0;

unsigned long lastFlashTime = 0;

bool isRedOn = false;

bool tiltActivated = false;  // To track when tilt switch is activated

void setup() {

  Serial.begin(115200);

  // Initialize tilt switch and piezo sensors

  pinMode(tiltSwitchPin, INPUT);

  for (int i = 0; i < 3; i++) {

    pinMode(piezoPins[i], INPUT);

  }

  // Initialize Neopixel strips

  strip1.begin();

  strip2.begin();

  strip1.show(); // Turn off all LEDs initially

  strip2.show();

}

void loop() {

  int tiltState = digitalRead(tiltSwitchPin);

  if (tiltState == HIGH) {

    tilt = 1;

  }

  // Read piezo sensors and ultrasonic sensors

  int piezo1 = analogRead(piezoPins[0]);

  int piezo2 = analogRead(piezoPins[1]);

  int piezo3 = analogRead(piezoPins[2]);

  int tilt = digitalRead(tiltSwitchPin);

  int ucc1 = sonar[0].ping_cm();

  int ucc2 = sonar[1].ping_cm();

  int ucc3 = sonar[2].ping_cm();

  // Send sensor data over Serial

  Serial.print(piezo1); Serial.print(",");

  Serial.print(piezo2); Serial.print(",");

  Serial.print(piezo3); Serial.print(",");

  Serial.print(tilt); Serial.print(",");

  Serial.print(ucc1); Serial.print(",");

  Serial.print(ucc2); Serial.print(",");

  Serial.println(ucc3); // End with newline

  // Check if the tilt switch is activated

  if (tiltState == LOW && !tiltActivated) {  // If tilt switch is pressed and not yet activated

    tiltActivated = true;

    executeColorSequence();

  }

  // Flash red for 15 seconds before switching to orange

  if (millis() - flashStartTime < 15000 && !tiltActivated) {

    flashRed();

  } else {

    // After 15 seconds, revert to calm orange unless tilt is activated

    if (!tiltActivated) {

      setStripToOrange(strip1);

      setStripToOrange(strip2);

    }

  }

  // After the color sequence, revert to calm orange if tilt was activated

  if (tiltActivated) {

    setStripToOrange(strip1);

    setStripToOrange(strip2);

    tiltActivated = false;  // Reset the flag after completing the sequence

  }

  delay(20);

}

// Function to set an entire Neopixel strip to white light

void setStripToWhite(Adafruit_NeoPixel &strip) {

  for (int i = 0; i < NUM_LEDS; i++) {

    strip.setPixelColor(i, strip.Color(255, 255, 255)); // Full white

  }

  strip.show();

}

// Function to set an entire Neopixel strip to orange light

void setStripToOrange(Adafruit_NeoPixel &strip) {

  for (int i = 0; i < NUM_LEDS; i++) {

    strip.setPixelColor(i, strip.Color(255, 100, 0)); // Orange color

  }

  strip.show();

}

// Function to set an entire Neopixel strip to red light

void setStripToRed(Adafruit_NeoPixel &strip) {

  for (int i = 0; i < NUM_LEDS; i++) {

    strip.setPixelColor(i, strip.Color(255, 0, 0)); // Full red

  }

  strip.show();

}

// Function to set an entire Neopixel strip to yellow light

void setStripToYellow(Adafruit_NeoPixel &strip) {

  for (int i = 0; i < NUM_LEDS; i++) {

    strip.setPixelColor(i, strip.Color(255, 255, 0)); // Yellow color

  }

  strip.show();

}

// Function to set an entire Neopixel strip to green light

void setStripToGreen(Adafruit_NeoPixel &strip) {

  for (int i = 0; i < NUM_LEDS; i++) {

    strip.setPixelColor(i, strip.Color(0, 255, 0)); // Green color

  }

  strip.show();

}

// Function to handle the flashing red effect for 15 seconds

void flashRed() {

  unsigned long currentTime = millis();

  // Flash every 500 milliseconds (on for 250ms, off for 250ms)

  if (currentTime - lastFlashTime >= 500) {

    lastFlashTime = currentTime;

    if (isRedOn) {

      // Turn off red light

      setStripToBlack(strip1);

      setStripToBlack(strip2);

      isRedOn = false;

    } else {

      // Turn on red light

      setStripToRed(strip1);

      setStripToRed(strip2);

      isRedOn = true;

    }

  }

}

// Function to set an entire Neopixel strip to black (off)

void setStripToBlack(Adafruit_NeoPixel &strip) {

  for (int i = 0; i < NUM_LEDS; i++) {

    strip.setPixelColor(i, strip.Color(0, 0, 0)); // Turn off all LEDs

  }

  strip.show();

}

// Function to execute the color sequence (Red, Yellow, Green)

void executeColorSequence() {

  // Set Red for 2 seconds

  setStripToRed(strip1);

  setStripToRed(strip2);

  delay(2000);

  // Set Yellow for 2 seconds

  setStripToYellow(strip1);

  setStripToYellow(strip2);

  delay(2000);

  // Set Green for 2 seconds

  setStripToGreen(strip1);

  setStripToGreen(strip2);

  delay(2000);

  // After 6 seconds, revert to calm orange

  setStripToOrange(strip1);

  setStripToOrange(strip2);

Processing:

import processing.serial.*;

Serial serialPort;

// Image declarations

PImage photo, mountainImage, finalImage, teacupImage, teaLeavesImage, glassImage, uploadedImage, cup2Image, glassfillImage;

int NUM_OF_VALUES_FROM_ARDUINO = 7;  

/* This array stores values from Arduino */

int arduino_values[] = new int[NUM_OF_VALUES_FROM_ARDUINO];

float prevX, prevY; 

boolean firstRun = true; 

// cups

boolean cup1 = false;

boolean cup2 = false;

boolean cup3 = false;

boolean glass1 = false;

boolean cup11 = false;

boolean cup12 = false;

boolean cup13 = false;

void setup() {

  size(1280, 720);

  background(0);

  // Load and resize images

  photo = loadImage("file.png");

  mountainImage = loadImage("mountain.png");

  finalImage = loadImage("wood.jpg");

  teacupImage = loadImage("chinese tea cup no background.png");

  teaLeavesImage = loadImage("tealeaves.png");

  glassImage = loadImage("glass.png");

  uploadedImage = loadImage("cupnobackground.png");

  cup2Image = loadImage("cup filled.png");

  glassfillImage = loadImage("glassfilled.png");

  photo.resize(width, height);

  mountainImage.resize(width, height);

  finalImage.resize(width, height);

  teacupImage.resize(300, 300);

  teaLeavesImage.resize(150, 150);

  glassImage.resize(200, 200);

  uploadedImage.resize(300, 300); // Resize as necessary for display

  printArray(Serial.list());

  serialPort = new Serial(this, "COM3", 115200);

}

void draw() {

  background(0); // Clear screen each frame

  imageMode(CENTER);

  image(finalImage, width / 2, height / 2);

  image(teacupImage, 800, 500, 500, 500);

  image(glassImage, 400, 500, 300, 300);

  textSize(60);

text("Welcome to the Tea Room", 330, 360);

  // Get sensor values

  getSerialData();

  float val1 = arduino_values[0]; // Piezo sensor 1

  float val2 = arduino_values[1]; // Piezo sensor 2

  float val3 = arduino_values[2]; // Piezo sensor 3

  float val4 = arduino_values[3]; // Tilt switch

  float val5 = arduino_values[4]; // Ultrasonic sensor 1

  float val6 = arduino_values[5]; // Ultrasonic sensor 2

  float val7 = arduino_values[6]; // Ultrasonic sensor 3

  // Debugging sensor values

  println("Sensor Values: " + join(str(arduino_values), ", "));

  // Update flags based on conditions

  if (val1 > 30) { // Piezo sensor threshold

    cup1 = true;

  }

  if (val2 > 30) { // Piezo sensor threshold

    cup3 = true;

  }

  if (val3 > 40) { // Piezo sensor threshold

    cup2 = true;

  }

  if (val4 == 1) { // Tilt switch activation

    glass1 = true;

  }

  if (val5 >= 30 && val5 <= 40) { // Ultrasonic sensor 1 threshold

    cup13 = true;

  } 

  if (val6 >= 30 && val6 <= 40) { // Ultrasonic sensor 2 threshold

    cup12 = true;

  } 

  if (val7 >= 30 && val7 <= 40 ){ // Ultrasonic sensor 3 threshold

    cup11 = true;

  } 

  // Draw images based on flags

  if (cup1) {

    image(uploadedImage, width / 3 - 100, height / 4);

  }

  if (cup2) {

    image(uploadedImage, width / 2, height / 4);

  }

  if (cup3) {

    image(uploadedImage, 2 * width / 3 + 100, height / 4);

  }

  if (glass1) {

    image(glassfillImage, 400, 480, 380, 380);

  }

  if (cup11) {

    image(cup2Image, 325, 150, 400, 400);

  }

  if (cup12) {

    image(cup2Image, 650, 150, 400, 400);

  }

  if (cup13) {

    image(cup2Image, 975, 150, 400, 400);

  }

}

void getSerialData() {

  while (serialPort.available() > 0) {

    String in = serialPort.readStringUntil(10);  // Read until newline

    if (in != null) {

      println("Raw Data: " + in);  

      String[] serialInArray = split(trim(in), ",");

      if (serialInArray.length == NUM_OF_VALUES_FROM_ARDUINO) {

        try {

          for (int i = 0; i < serialInArray.length; i++) {

            arduino_values[i] = int(serialInArray[i]); 

          }

          println("Parsed Values: " + join(str(arduino_values), ", "));

        } catch (NumberFormatException e) {

          println("Error: Unable to parse data: " + in);

        }

      } else {

        println("Invalid Data: " + in + " (Expected " + NUM_OF_VALUES_FROM_ARDUINO + " values)");

      }

    }

  }

}