Processing & Arduino code for the Sailing By boat project

SailingByArduinoCode

// Project by Sophie McDonald
//much of this code has come from Arduino examples, including:
//ReadACSIIString by Tom Igoe
//stepper_oneRevolution by Tom Igoe 
// with help from Vincent Ackermans
// infomation from http://forum.arduino.cc/index.php?topic=142058.0

#include <Stepper.h>




// Incoming Data Variables
int swellPeriodIN;
int windSpeedIN;

// other Variables
int waveSpeed;
int fanSpeed;

// Pin Vairiables
int fanPin = 3;


// Stepper Library 
const int stepsPerRevolution = 1024; // divisable by 8, the stepper phase. 
Stepper waveStepper(stepsPerRevolution,4,5,6,7);// Stepper motor pins.





void setup(){

  waveStepper.setSpeed(10);
  pinMode(fanPin,OUTPUT);

  Serial.begin(9600);
}


void loop(){

  // incoming data - weather direction in degrees

  // map to º - I'm guessing 360 would actually be 0.
  // The step angle is 5.625° / 64


  while (Serial.available() > 0) { // do this only when data is recieved

    ///READ INCOMING DATA 
    swellPeriodIN = Serial.parseInt(); 
    windSpeedIN = Serial.parseInt(); 
 
//    Serial.println("swellPeriodIN,windSpeedIN"); //test
    
    if (Serial.read() == '\n') { // when last part of incoming string recieved, do this...
    
      analogWrite(fanPin,windSpeedIN);
     
     /// wave stepper 
      waveStepper.setSpeed(60000/swellPeriodIN); //swellPeriod in miliseconds gives the speed in seconds to the .setstepper()
      delay(10); //
      waveStepper.step(stepsPerRevolution);


  
    }
  }
}

SailingByProcessingCode

// Project by Sophie McDonald
// with help from Vincent Ackermans
//The communication elements of this code were taken from Arduino example PhysicalPixel by Tom Igoe 


//talking to the Arduino
import processing.serial.*; 
Serial port; 
 
boolean found = false;
JSONObject json;


void setup(){
  //taken from Arduino example PhysicalPixel
  //talking to the Arduino
   println(Serial.list()); 
   port = new Serial(this, Serial.list()[0], 9600); 
}

void draw(){
 
  // put feed in here
  read();
 
  
}

void read() {
  
 json = loadJSONObject("WWO.json"); //static file


    // Nested data for World Weather Online:
     JSONObject data = json.getJSONObject("data");
       JSONObject weather = data.getJSONArray("weather").getJSONObject(0);
       //println("weather"+weather.getString("date"));
       JSONArray hourly = weather.getJSONArray("hourly");
           JSONObject seaData = hourly.getJSONObject(0);
             String swellPeriod = seaData.getString("swellPeriod_secs");
             String windspeedMiles = seaData.getString("windspeedMiles");
   

    //////// SCALE VALUES to Stepper values 256 steps per revolution. http://forum.arduino.cc/index.php?topic=142058.0 /////////         
   
     float windspeedMilesMap = map(float(windspeedMiles),0,80,0,255); // map to PWM resolution max 255      
     float swellToMilSeconds = float(swellPeriod) *1000; // divide the number of swell seconds by 1024 for the stepper speed  
     
     windspeedMilesMap =  constrain(windspeedMilesMap,0,1024); 
   

    println("swellPeriod "+swellPeriod);
    println("windspeedMiles "+windspeedMiles);
    String dataString = new String(int(swellToMilSeconds) + " " + int(windspeedMilesMap) + "\n");
    print(dataString);
    port.write(dataString); 
  
    delay(int(swellPeriod)*1000); // delay loop to limit calls to the website (there is a 3 times per sec limit on a free account.)
}