Sending multiple numbers to Arduino via Serial

Processing Electronics (Arduino, etc.)
3

Thank you, kll

So, i have implemented at least some of your advice. Unfortunately, Im still very new with Processing, so im not sure i truly understand all of what youre trying to impart on me.

One thing that im confused by is moving the curly brackets…you mentioned moving them down…and i have…but when i do, the info that i should be reading in the Processing monitor from the arduino just results in “0”, instead of the numbers i would expect to get back.

That all said, I’ve adjusted both sets of code, and well…it works…at least i think it does. That is, the numbers im getting in the Processing monitor are correct, and they are stable and are doing exactly what i want them to do. Im not so sure its elegant, (in fact, my code seems rather “brutish” and clumsy, if you will), but it works. (Again, im a noob, so some of the stuff you mentioned are confusing to me)

import processing.serial.*;
Serial myPort;  // Create object from Serial class
JSONObject json, main1, main2, main3, wind1, wind2, wind3 ;

String APIKEY = "";

int temp1, temp2, temp3, humidity1, humidity2, humidity3, speed1, speed2, speed3;
int increment1 = 0;
int time_to_fetch;
int time_between_fetches = 10000; // Ten seconds.

void setup() {
  String portName = Serial.list()[2]; //change the 0 to a 1 or 2 etc. to match your port
  myPort = new Serial(this, portName, 9600);
  delay(5000);
  size(640, 500);
  background(102);
  noStroke();
  fill(0, 102);
}

void draw() {
  if ( millis() > time_to_fetch ) {
    loadData();
  }

  myPort.write(temp1 + ";" + humidity1 + ";" + speed1 +  ";" + temp2 + ";" + humidity2 + ";" + speed2 + ";" + ";" + increment1 + 'e' + ";");
  //myPort.write(temp2 + ";" + humidity2 + ";" + speed2 + ";" + 'e' + ";");
  //myPort.write(increment1 + ";");
  //myPort.write(humidity1 + ":");
  //myPort.write(speed1 + ":");
  //myPort.write('\r'); //send an ASCII character 10 (value)
  //myPort.write(Integer.toString(humidity1));
  //myPort.write(Integer.toString(speed1));
  //myPort.write('e');

  myPort.clear();
}


void loadData() {

  increment1++;
  
  time_to_fetch = millis() + time_between_fetches;
  json = loadJSONObject("http://api.openweathermap.org/data/2.5/group?id=5964347,1266510,2347078&units=imperial&APPID="+APIKEY);

  JSONArray weatherArr = json.getJSONArray("list");
  //println(weatherArr);

  ///////////////////////////////////////////////////////////////////////

  JSONObject weatherObj1 = weatherArr.getJSONObject(0);
  //println("Weather Object:\n" + weatherObj, ENTER);

  main1 = weatherObj1.getJSONObject("main");
  wind1 = weatherObj1.getJSONObject("wind");
  speed1 = wind1.getInt("speed");
  humidity1 = main1.getInt("humidity");
  temp1 = main1.getInt("temp");

  ///////////////////////////////////////////////////////////////////////
  JSONObject weatherObj2 = weatherArr.getJSONObject(1);
  //println("Weather Object:\n" + weatherObj, ENTER);

  main2 = weatherObj2.getJSONObject("main");
  wind2 = weatherObj2.getJSONObject("wind");
  speed2 = wind2.getInt("speed");
  humidity2 = main2.getInt("humidity");
  temp2 = main2.getInt("temp");

  ///////////////////////////////////////////////////////////////////////

  JSONObject weatherObj3 = weatherArr.getJSONObject(2);
  //println("Weather Object:\n" + weatherObj, ENTER);

  main3 = weatherObj3.getJSONObject("main");
  wind3 = weatherObj3.getJSONObject("wind");
  speed3 = wind3.getInt("speed");
  humidity3 = main3.getInt("humidity");
  temp3 = main3.getInt("temp");

  ///////////////////////////////////////////////////////////////////////

  //println(temp1);
  //println(humidity1);
  //println(speed1);
  //println(temp2);
  //println(humidity2);
  //println(speed2);
  //println(temp3);
  //println(humidity3);
  //println(speed3);
  //println(increment1);
  drawData();

  //exit();
}

void drawData() {
  background(102);
  textSize(18);
  text("Temp1: " + nfc(temp1) + 
    "\nHumidity1: " + nfc(humidity1) +
    "\nSpeed1: " + speed1 +
    "\n "  +
    "\nTemp2: " + temp2 +
    "\nHumidity2: " + humidity2 +
    "\nSpeed2: " + speed2 +
    "\n "  +
    "\nTemp3: " + temp3 +
    "\nHumidity3: " + humidity3 +
    "\nSpeed3: " + speed3 + 
    "\n "  +
    "\nIncrement: " + increment1, 10, 50);
}

void serialEvent(Serial p) {
  try {
    // get message till line break (ASCII > 13)
    String message = p.readStringUntil(13);
    // just if there is data
    if (message != null) {
      println("message received: "+trim(message));
    }
  }
  catch (Exception e) {
  }
}


const long BAUD_RATE = 9600;
int x1, y1, z1, x2, y2, z2, x3, y3, z3;
int a;
char c;
long v = 0;
//buffer [];
void setup() {
  Serial.begin(BAUD_RATE);
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
  x1 = 0;
  y1 = 0;
  z1 = 0;

  x2 = 0;
  y2 = 0;
  z2 = 0;

  x3 = 0;
  y3 = 0;
  z3 = 0;

  a = 0;
}

void loop() {
  receiveData();

  if ( a <= 4 || a >= 7) {
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }


  Serial.println(x1);
  //  delay(5000);
  Serial.println(y1);
  //  delay(5000);
  Serial.println(z1);
  //  delay(5000);
  Serial.println(x2);
  Serial.println(y2);
  Serial.println(z2);
  Serial.println(a);
  delay(500);
}

void receiveData() {


  if (Serial.available() >= 4) {
    for (int i = 0; i < 4; i++) {
      Serial.readStringUntil('e');
      x1 = Serial.parseInt();
      y1 = Serial.parseInt();
      z1 = Serial.parseInt();
      x2 = Serial.parseInt();
      y2 = Serial.parseInt();
      z2 = Serial.parseInt();
      a = Serial.parseInt();
    }
  }
}
//    if (c == 'e') {
//      Serial.println(v);
//      v = 0;
//    }
//  }
//}