Published September 2, 2019 © GPL3+

Social Media Without the Internet

What'd it be to interact with people using 'social media features' in real life? There's a wearable that explores exactly that!!!

ExpertShowcase (no instructions)4,819

Things used in this project

Hardware components

Arduino Leonardo

Raspberry Pi 3 Model B

Adafruit NeoPixel Digital RGB LED Strip 144 LED, 1m White

Adafruit Standard LCD - 16x2 White on Blue

mcp3008 8-channel 10-bit ADC with SPI Interface

74AHCT125 Quad Level-Shifter

Force-sensitive Resistor

Pressure-sensitive conductive sheet (Velostat/Linqstat)

7-inch touch screen monitor

Tiny Nanny Cam

Sewable Conductive Thread

Lipo battery 7.4V 5200mAh

NiMH Battery 7.2V 3000mAh

Software apps and online services

Arduino IDE

The Processing Foundation Processing

Raspberry Pi Raspbian

Hand tools and fabrication machines

Sewing Machine

Bantam Tools Desktop PCB Milling Machine

Story

Before you started reading, you may want to check out the two video documentation to understand the artwork.

The wearable's functions:

People interaction:

For more info and photos: https://tuangstudio.com/portfolio/social-media-without-the-internet

----------------------------------

It is all started from the curiosity of what makes humans perceive information online the way we do nowadays. Whether the small information to big data online, such as an online dating profile, emoji code interpretation, and the complicated info graphic for enterprise, humans have ways of interpretation and understand these things based on various factors like, cultural backgrounds, native languages, and education. Thus, the research called, "Digital Sense, " is begun to examine how humans in the modern days have developed a new senes --the "digital sense"-- to interact with all these digital contents. The process of research included an art practice to produce an art innovation. In this research, there are two innovations namely, Social Media without the Internet, which examine the sense of touch, and Signal Moods, which explore the sense of hearing. Social Media without the Internet has been out to the public at UCLA, New Wright Gallery, and Little Tokyo in Los Angeles.

An image shows the wearable's interaction features and real-time videos.

“Social Media without the Internet” is an interactive performance art project, created as an examination of how the human sense of touch is applied with the new digital sense of human in the society. Social Media without the Internet consists of two mediums: art object and performance. The art object is a tech wearable. Its functions are designed to be operated by hand gestures when people are socializing, i.e. handshaking, high-fiving, shoulder-tapping, and handholding. The performance is a medium of investigation of the way social media’s interactions can be introduced into the real world. The project encourages people to socialize and invites them to have more intimate interactions with one another.

These two mediums, the wearable and the live performance, were created to invigorate and inform each other. The interactive part of the wearable functions as a collector to amass data from interactions with participants, while the performance works to make that interaction happen. The wearable is designed as a blazer, an informal suit jacket without matching pants, that looks casual enough to be worn with other street-style clothing. In the gallery setting, there is live video of the jacket wearer and participants interacting streaming on monitors, which represents the broadcast of interaction between users on social media. However, without the Internet, the live stream operates as a “local area network” only.

The six interaction methods

Interaction in public area

There are also two principal topics that were parts of the development of Social Media without the Internet that merit in-depth discussion. The first is the result of digital interaction on social media platforms. These results are front-end data that present as numbers to users. Society has known these numbers since the arrival of social media, which ultimately they have affected everyday human life in many aspects. I call them “social media data." The blazer allows 6 methods of interactions: add a friend, unfriend, give a like, dislike, follow the wearer, and following someone. With these interaction methods, the wearable can collect 4 types of data: likes, followings, followers, and friends.

Add friends => Shake hand
Unfriend => Press switch on the left chest
Add Likes => High-five or click on emoticon icons on the front monitor
Dislikes => Click on ” X ” on the front monitor
Follow => Press on the right shoulder pad (to follow the person)
Following => Pull the string below the front monitor (to lead the person)

The second principal topic is humans’ common physical interaction among each other. Humans have different ways of interaction using body language based on individual personalities and cultures. However, because of some similarity of expressions, when we cannot communicate in a certain language functionally, this bodily language will be used as a primary communication method. For example, when traveling to a foreign country without fluency in its verbal language, we may notice that we use our hands more to describe something. Body language also involves a sense of touch, so this wearable is purposefully operated with four simple hand gestures: handshaking, hi-fiving, shoulder-tapping, and handholding. However, the actual interactions with viewers/participants are limitless.

"Social Media without the Internet" is a successful prototype of what we could use to learn and explore about digital humanity. The project is still in development and will have advanced prototype coming out in the future.

Code

#!/usr/bin/python
# Example using a character LCD connected to a Raspberry Pi or BeagleBone Black.
import time
import Adafruit_CharLCD as LCD
from ScrollLCD import*
#-----#
import Adafruit_GPIO.SPI as SPI
import MCP3008
#-----#
from neopixel import *
import argparse
import signal
import sys

# Raspberry Pi pin configuration:
# Note this might need to be changed to 21 for older revision Pi's.
lcd_rs        = 27 #26
lcd_en        = 22 #19
lcd_d4        = 25 #13
lcd_d5        = 24 #6
lcd_d6        = 23 #5
lcd_d7        = 17 #11
lcd_backlight = 4

# Define LCD column and row size for 16x2 LCD.
lcd_columns = 16
lcd_rows    = 2
#Hardware SPI configuration:
SPI_PORT   = 0
SPI_DEVICE = 0
mcp = MCP3008.MCP3008(spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE))

# Initialize the LCD using the pins above.
lcd = LCD.Adafruit_CharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7,
                           lcd_columns, lcd_rows, lcd_backlight)

def signal_handler(signal, frame):
        colorWipe(strip, Color(0,0,0))
        sys.exit(0)

def opt_parse():
        parser = argparse.ArgumentParser()
        parser.add_argument('-c', action='store_true', help='clear the display on exit')
        args = parser.parse_args()
        if args.c:
                signal.signal(signal.SIGINT, signal_handler)

def wheel(pos):
        """Generate rainbow colors across 0-255 positions."""
        if pos < 85:
                return Color(pos * 3, 255 - pos * 3, 0)
        elif pos < 170:
                pos -= 85
                return Color(255 - pos * 3, 0, pos * 3)
        else:
                pos -= 170
                return Color(0, pos * 3, 255 - pos * 3)

# LED strip configuration:
LED_COUNT      = 48      # Number of LED pixels.
LED_PIN        = 18      # GPIO pin connected to the pixels (18 uses PWM!).
#LED_PIN        = 10      # GPIO pin connected to the pixels (10 uses SPI /dev/spidev0.0).
LED_FREQ_HZ    = 800000  # LED signal frequency in hertz (usually 800khz)
LED_DMA        = 10      # DMA channel to use for generating signal (try 10)
LED_BRIGHTNESS = 255     # Set to 0 for darkest and 255 for brightest
LED_INVERT     = False   # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL    = 0       # set to '1' for GPIOs 13, 19, 41, 45 or 53
LED_STRIP      = ws.WS2811_STRIP_GRB   # Strip type and colour ordering
#LED_STRIP      = ws.WS2812_STRIP

LED_i =0
light = True
aftertouch=False
count=0
aftertap=False
following=0

def tuang(strip,wait_ms=20,iterations=1):
        """Draw 1 pixel at a time."""
        for j in range(1):
                print(j)
                for i in range(strip.numPixels()):
                        strip.setPixelColor(strip.numPixels()-i, wheel((int(i * 256 / strip.numPixels())+j) & 255))
                        strip.show()
                        time.sleep(0.05)
                        # strip.show()
                        # time.sleep(0.05)
                for i in range(strip.numPixels()):
                        strip.setPixelColor(strip.numPixels()-i, 0)
                        strip.show()
                        time.sleep(wait_ms/1000.0)
                        LED_i = i
                        print(LED_i)

#text="Hi! I'm Tuang.  I do cool things."
#breaker=False
#n = 16
#rows = [text[i:i+n] for i in range(0, len(text), n)]
#n_rows = len(rows)
#scroll(lcd,text,False,False,1)

print('Reading MCP3008 values, press Ctrl-C to quit...')
# Print nice channel column headers.
print('| {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} |'.format(*range(8)))
print('-' * 57)

# Main program logic follows:
if __name__ == '__main__':
    #Process arguments
    opt_parse()
    # Create NeoPixel object with appropriate configuration.
    strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL, LED_STRIP)
    #Intialize the library (must be called once before other functions)
    strip.begin()
    while True:
        #Read all the ADC channel values in a list.
        values = [0]*8
        for i in range(8):
                #The read_adc function will get the value of the specified channel (0-7).
                values[i] = mcp.read_adc(i)
                #Pause for half a second.
        print('| {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} |'.format(*values))
        time.sleep(0.2)
        #lcd.clear()
        if values[1]>800:
            if aftertouch:
                    count=count+1
                    lcd.clear()
                    lcd.message('following: '+str(following))
                    lcd.message('\nfollowers: '+str(count)+'     ')
                    #scroll(lcd,text,count,breaker,False,False,0)
                    aftertouch=False
        else:
            aftertouch=True
            #scroll(lcd,text,count,breaker,False,False,0)
            lcd.message('following: '+str(following))
            lcd.message('\nfollowers: '+str(count)+'     ')
        if values[2]>600:
            if aftertap:
                    #print('sholder tap!')
                    following=following+1
                    lcd.clear()
                    lcd.message('following: '+str(following))
                    lcd.message('\nfollowers: '+str(count)+'     ')
                    #scroll(lcd,text,count,breaker,False,False,0)
                    aftertap=False
        else:
            aftertap=True
            #scroll(lcd,text,count,breaker,False,False,0)
            lcd.message('following: '+str(following))
            lcd.message('\nfollowers: '+str(count)+'     ')
        if values[0]>600:
            print("Hi5!")
            light=True
        else:
            light=False
        if light:
            tuang(strip)
            light=False
        else:
            for i in range(strip.numPixels()):
                strip.setPixelColor(i,0)
            strip.show()
        #for x in range(n_rows):
         #       lcd.home()
          #      lcd.clear()
           #     nxt = x + 1
            #    lcd.message(rows[x])
             #   lcd.message('\nFollower:'+str(count)+'     ') #space 3 times to avoid any char on the first row drops
              #  if nxt == n_rows:
               #         sleep(2)
                        #break
                #else:
                 #       lcd.message(rows[nxt])
                  #      sleep(1)

 #include <LedControl.h>
#include <Adafruit_NeoPixel.h>

#define PIXEL_PIN    6    // Digital IO pin connected to the NeoPixels.
#define PIXEL_COUNT 46

int DIN = 12;
int CS =  11;
int CLK = 10;
int count = 0;
String number = "";
long a = random(50, 255);
char Array[2];
byte one[8] =     {0x18, 0x28, 0x8, 0x8, 0x8, 0x8, 0x8, 0x3e};
byte two[8] =     {0x1c, 0x22, 0x2, 0x2, 0x1c, 0x20, 0x20, 0x3e};
byte three[8] =   {0x1c, 0x22, 0x2, 0x2, 0x1e, 0x2, 0x22, 0x1c};
byte four[8] =    {0xc, 0x14, 0x24, 0x44, 0x7f, 0x4, 0x4, 0x4};
byte five[8] =    {0x7e, 0x40, 0x40, 0x78, 0xe, 0x2, 0x2, 0x7c};
byte six[8] =     {0x3c, 0x42, 0x40, 0x40, 0x7c, 0x42, 0x42, 0x3c};
byte seven[8] =   {0x7e, 0x2, 0x2, 0x4, 0x8, 0x10, 0x10, 0x10};
byte eight[8] =   {0x3c, 0x42, 0x42, 0x3c, 0x66, 0x42, 0x42, 0x3c};
byte nine[8] =    {0x3c, 0x42, 0x42, 0x42, 0x3e, 0x2, 0x42, 0x3c};
byte zero[8] =    {0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3c};
byte smile[8] =   {0x3C, 0x42, 0xA5, 0x81, 0xA5, 0x99, 0x42, 0x3C};
byte sad[8] =   {0xff, 0x81, 0xa5, 0x81, 0x99, 0xa5, 0x81, 0xff};

bool smile_sw = false;

LedControl lc = LedControl(DIN, CLK, CS, 2); // Pins: DIN,CLK,CS, amount of display connected
Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

const int unFriend_pin = 4;     // the number of the pushbutton pin
const int addFriend_pin = 5;  //the number of rings switch
const int ledPin =  13;      // the number of the LED pin
int buttonState = 0;
int ringState = 0;
int oldState = 0;
int oldRingState = 0;
int showType = 0;

void setup() {
  Serial.begin(9600);
  lc.shutdown(0, false);      //The MAX72XX is in power-saving mode on startup
  lc.setIntensity(0, 1);     // Set the brightness to maximum value. scale is 0-15; 15 is the brightest
  lc.clearDisplay(0);         // and clear the display

  lc.shutdown(1, false);      //The MAX72XX is in power-saving mode on startup
  lc.setIntensity(1, 1);     // Set the brightness to maximum value. scale is 0-15; 15 is the brightest
  lc.clearDisplay(1);         // and clear the display

  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(unFriend_pin, INPUT);
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'

}

void loop() {

  buttonState = digitalRead(unFriend_pin);
  ringState = digitalRead(addFriend_pin);
  Serial.print("unfreinds x ");
  Serial.print(buttonState + " add freinds x ");
  Serial.println(addFriend_pin);
  // Get current button state.
  int newState = digitalRead(unFriend_pin);
  int newRingState = digitalRead(addFriend_pin);
  // Check if state changed from high to low (button press).
  //  if (newState >= 830 && oldState < 830) { //if analogRead
  if (newState == HIGH && oldState == LOW) {
    // Short delay to debounce button.
    delay(20);
    // Check if button is still low after debounce.
    newState = digitalRead(unFriend_pin);

    //    if (newState >=830) {  //if analogRead
    if (newState == HIGH) {
      showType = 10;
      count--;
      if (count <= 0) {
        count = 0;
      }
      printFir_Byte(sad);
      printSec_Byte(sad);
      startShow(showType);
      showNum();

      digitalWrite(ledPin, HIGH);
      delay(250);
    }

  }
  if (newRingState == HIGH && oldRingState == LOW) {
    // Short delay to debounce button.
    delay(20);
    newRingState = digitalRead(addFriend_pin);
    if (newRingState == HIGH) {
      showType++;
      count++;
      if (showType > 9) {
        showType = 0;
      }
      a = random(50, 255);
      Serial.println(a);
      printFir_Byte(smile);
      printSec_Byte(smile);
      startShow(showType);
      showNum();

      digitalWrite(ledPin, HIGH);
      delay(250);
    }

  }

  // Set the last button state to the old state.
  oldState = newState;
  oldRingState = newRingState;
  //  lc.clearDisplay(0);


}

void startShow(int i) {
  switch (i) {
    case 1: theaterChase(strip.Color(a,   0,   0), 50);  // Green
      break;
    case 2: theaterChase(strip.Color(0,   a,   0), 50); // Blue
      break;
    case 3: theaterChase(strip.Color(0,   0,   a), 50);  // light blue
      break;
    case 4: theaterChase(strip.Color(0,  100,   a), 50);  // mint
      break;
    case 5: theaterChase(strip.Color(0,   a,   100), 50);// warm yellow
      break;
    case 6: theaterChase(strip.Color(a,   100,   0), 50); // violet
      break;
    case 7: theaterChase(strip.Color( 100,   a, 100), 50); // christmas green
      break;
    case 8: theaterChase(strip.Color(0,   50,   a), 50); // dark red
      break;
    case 9: theaterChase(strip.Color(50,   a,   0), 50); // super hero blue
      break;
    case 0: theaterChase(strip.Color(a,   0,   50), 50); // bright red
      break;
    case 10: theaterChase(strip.Color(255,   0,   0), 50); // super hero blue
      break;
  }
  Serial.println(i);
  strip.show();
}

void showNum() {
  char Array[2];
  if (count <= 99) {
    dtostrf(count, 2, 0, Array);
  } else {
    count = 0;
    dtostrf(count, 2, 0, Array);
  }
  Serial.print(Array[0]);
  Serial.print(" , ");
  Serial.println(Array[1]);
  if (Array[0] == ' ') {
    printFir_Byte(zero);
  } else if (Array[0] == '1') {
    printFir_Byte(one);
  } else if (Array[0] == '2') {
    printFir_Byte(two);
  } else if (Array[0] == '3') {
    printFir_Byte(three);
  } else if (Array[0] == '4') {
    printFir_Byte(four);
  } else if (Array[0] == '5') {
    printFir_Byte(five);
  } else if (Array[0] == '6') {
    printFir_Byte(six);
  } else if (Array[0] == '7') {
    printFir_Byte(seven);
  } else if (Array[0] == '8') {
    printFir_Byte(eight);
  } else if (Array[0] == '9') {
    printFir_Byte(nine);
  } else if (Array[0] == '0') {
    printFir_Byte(zero);
  }


  if (Array[1] == '1') {
    printSec_Byte(one);
  } else if (Array[1] == '2') {
    printSec_Byte(two);
  } else if (Array[1] == '3') {
    printSec_Byte(three);
  } else if (Array[1] == '4') {
    printSec_Byte(four);
  } else if (Array[1] == '5') {
    printSec_Byte(five);
  } else if (Array[1] == '6') {
    printSec_Byte(six);
  } else if (Array[1] == '7') {
    printSec_Byte(seven);
  } else if (Array[1] == '8') {
    printSec_Byte(eight);
  } else if (Array[1] == '9') {
    printSec_Byte(nine);
  } else if (Array[1] == '0') {
    printSec_Byte(zero);
  }

}

void printFir_Byte(byte fir_char[])
{
  int i = 0;
  for (i = 0; i < 8; i++)
  {
    lc.setRow(0, i, fir_char[i]);
  }
}


void printSec_Byte(byte sec_char [])
{
  int i = 0;
  for (i = 0; i < 8; i++)
  {
    lc.setRow(1, i, sec_char[i]);
  }
}

//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  for (int j = 0; j < 10; j++) { //do 10 cycles of chasing
    for (int q = 0; q < 3; q++) {
      for (int i = 0; i < strip.numPixels(); i = i + 3) {
        strip.setPixelColor(i + q, c);  //turn every third pixel on
      }
      strip.show();
      delay(wait);
      for (int i = 0; i < strip.numPixels(); i = i + 3) {
        strip.setPixelColor(i + q, 0);      //turn every third pixel off

      }
    }
  }
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if (WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}

import processing.io.*;
MCP3008 adc;
PFont font;
int count=0;
boolean readytoHit=true;
boolean debugging =false;
int scale =2;
color[] colors;
float a, b;
int startTime;
int totalTime=3000;
int currentTime;
boolean glitch=false;
int smile=0, laugh=0, cry=0, kiss=0, confused=0;
void settings() {
  if (debugging) {
    size(800/scale, 480/scale);
  } else {
    fullScreen(0);
  }
  colors = new color [3];
  colors[0] = color(255, 0, 0);
  colors[1] = color(0, 255, 0);
  colors[2] = color(0, 0, 255);
}

void setup() {
  //printArray(SPI.list());
  adc = new MCP3008(SPI.list()[0]);
  font = loadFont("ProcessingSansPro-Semibold-250.vlw");
  textFont(font, 250);
}

void draw() { 
  if (glitch) {
    blendMode(BLEND);
    a = random(100);
    b = random(100, 255);
    background(255);
    fill(b, a, 0);
  } else {
    background(255, 0, 0);
    fill(255);
  }
  textAlign(CENTER, CENTER);
  //text("LIKES: "+count, width/2, height/2);
  countHit();
  graphic();
  timer();
  println(adc.getAnalog(0));
}
void countHit() {
  if (adc.getAnalog(0)<0.75 && adc.getAnalog(0)>0.0) {
    readytoHit=true;
  }

  if (readytoHit) {
    if (adc.getAnalog(0)>=0.75) {
      count++;
      glitch=true;
      readytoHit=false;
    }
  }

  println("hit: "+readytoHit);
  //println("glitch: "+glitch);
  //println("FSR chan 0: "+adc.getAnalog(0));
  delay(200);
}

void graphic() {
  //ProcessingSansPro-Semibold-48.vlw
  pushMatrix();
  translate(0, height);
  rotate(radians(-90));
  textSize(50);
  text("LIKE ME!?", height/2, 50);
  textSize(30);
  text("my likes today:", height/2, 100);
  textSize(200);
  text(count, height/2, width/2-50);
  textSize(35);
  text(" X ", height-60, 150);
  textSize(26);
  text("--------------------------------------------", height/2, width-340);
  text("how?", height/2, width-300);
  textAlign(LEFT);
  text("  ^_^ ", 50, width-250);
  text("  ^D^ ", 50, width-200);
  text(" T_T ", 50, width-150);
  text("  v3v ", 50, width-100);
  text("  *c* ", 50, width-50);
  noFill();
  stroke(255, 255, 255);
  strokeWeight(3);
  ellipse(81, width-260, 60, 45);
  ellipse(81, width-210, 60, 45);
  ellipse(81, width-160, 60, 45);
  ellipse(81, width-110, 60, 45);
  ellipse(81, width-60, 60, 45);
  ellipse(height-60, 150, 80, 65);
  noStroke();
  textAlign(RIGHT);
  text(smile, height-50, width-250);
  text(laugh, height-50, width-200);
  text(cry, height-50, width-150);
  text(kiss, height-50, width-100);
  text(confused, height-50, width-50);
  textAlign(CENTER);
  if (glitch) {
    blendMode(EXCLUSION);
    textSize(50);
    text("i got a like now", (height/2)-5, width/2-50);
    textSize(30);
    text("my likes today:", height/2, 100);
    textSize(200);
    text(count, height/2, (width/2)-3);
    textSize(52);
    text("LIKE ME!", (height/2), width-250);
    text("LIKE ME!", (height/2), width-200);
    text("LIKE ME!", (height/2), width-150);
    text("LIKE ME!", (height/2), width-100);
    text("LIKE ME!", (height/2), width-50);
  } else {
    blendMode(BLEND);
  }
  popMatrix();
}

void timer() {
  currentTime=millis()-startTime;

  if (currentTime>totalTime) {
    glitch = false;
    fill(255);
    startTime = millis();
    //println("*******restart*********");
  }
  // println("time: "+ round(currentTime));
}
int i=0;
void mousePressed() {
  /*text("(^_^)",50,width-250);
   text("(^D^)",50,width-200);
   text("(T_T)",50,width-150);
   text("(V3V)",50,width-100);
   text("(*c*)",50,width-50);*/
  if (mouseY<425 && mouseY>363) {
    if (mouseX >527 && mouseX<557) {
      smile++;
      count++;
      glitch=true;
    } else if (mouseX >577 && mouseX<607) {
      laugh++;
      count++;
      glitch=true;
    } else if (mouseX >627 && mouseX<657) {
      cry++;
      count++;
      glitch=true;
    } else if (mouseX >677 && mouseX<707) {
      kiss++;
      count++;
      glitch=true;
    } else if (mouseX >726 && mouseX<756) {
      confused++;
      count++;
      glitch=true;
    }
  } else if (mouseY < height-50 && mouseY>0) {
    if (mouseX >125&&mouseX<175) {
      count--;
      println("unlike");
    }
  }
  //i++;
  //println(i+" x: "+mouseX+" y: "+mouseY);
}

import processing.io.SPI;

// MCP3008 is a Analog-to-Digital converter using SPI
// other than the MCP3001, this has 8 input channels
// datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf

class MCP3008 extends SPI {

  MCP3008(String dev) {
    super(dev);
    settings(500000, SPI.MSBFIRST, SPI.MODE0);
  }

  float getAnalog(int channel) {
    if (channel < 0 ||  7 < channel) {
      System.err.println("The channel needs to be from 0 to 7");
      throw new IllegalArgumentException("Unexpected channel");
    }
    byte[] out = { 0, 0, 0 };
    // encode the channel number in the first byte
    out[0] = (byte)(0x18 | channel);
    byte[] in = transfer(out);
    int val = ((in[1] & 0x03) << 8) | (in[2] & 0xff);
    // val is between 0 and 1023
    return val/1023.0;
  }
}