The sketch will get the data one time than it hangs on this message.

Here is my code; I am getting the data from an arduino teensy 3.5 Please help.

Thanks

import processing.serial.*; Serial port; int BaseEncGlobal; int ElbowEncGlobal; int ShoEncGlobal; int VertRotEnc; int HorRotEnc; int GripEncGlobal;

double X_axis; double Y_axis; double Z_axis; double GripAngle;

String data; boolean newData = false;

PFont font;

void setup() { size(1280,800); //port = new Serial(this, "/dev/cu.usbserial-A50285BI", 115200); port = new Serial(this, "/dev/cu.usbmodem2574541", 115200); port.bufferUntil('\n'); font = loadFont("AgencyFB-Bold-200.vlw"); textFont(font, 40); }

void draw()

{ if (newData == true) {

int spaceDown = 55; background(0,0,0); fill(46, 209, 2); text(BaseEncGlobal, 70, spaceDown); fill(0, 102, 153); text(ShoEncGlobal, 70, spaceDown2); fill(0, 102, 153); text(ElbowEncGlobal, 70, spaceDown3); fill(0, 102, 153); text(VertRotEnc, 70, spaceDown4); fill(0, 102, 153); text(HorRotEnc, 70, spaceDown5); fill(0, 102, 153); text( GripEncGlobal, 70, spaceDown*6);

text(Double.toString(X_axis/10), 270, spaceDown ); newData =false; }

}

void serialEvent (Serial port) {

data = port.readStringUntil('\n'); if (data != null) { data = trim(data);

int[] nums = int(split(data, ',')); BaseEncGlobal = nums [1]; ShoEncGlobal = nums [2]; ElbowEncGlobal = nums [3]; VertRotEnc = nums [4]; HorRotEnc = nums [5]; GripEncGlobal = nums [6]; X_axis = nums [7]; Y_axis = nums [8]; Z_axis = nums [9]; GripAngle = nums [10]; //println(Double.toString(X_axis/10));

println(data);

newData = true; }

}

/*

void serialEvent (Serial port) { data = port.readStringUntil('.'); data = data.substring(0, data.length() - 1);

// look for the comma between Celcius and Farenheit index = data.indexOf(","); // fetch the C Temp temp_c = data.substring(0, index); // fetch the F Temp //temp_f = data.substring(index+1, index); temp_f = data.substring(1, data.length());

ElbowEncGlobal =  getValue(data, ',', 2);

} */

    String trainInfo = "E215\n17:30 - Howth to Bray (-3 mins late)\nArrived Dublin Connolly next stop Tara Street";
    int start      = trainInfo.indexOf("(" ) + 1;  // STEP 1 
    int end        = trainInfo.indexOf(" mins", start);      // STEP 2
    String status  = trainInfo.substring(start, end);    // STEP 3
    int status_no   = int(status);                    // STEP 4
    println(status_no);

Whereas in my case I get an error at the point of the substring():

    void requestData() {   
      for (int i = 0; i < children.length; i++) {     

        XML announcementElement = children[i].getChild("PublicMessage");
        String announcement = announcementElement.getContent(); 

        int start      = announcement.indexOf("(" ) + 1;        // STEP 1 
        int end        = announcement.indexOf(" mins", start);  // STEP 2
        String status  = announcement.substring(start, end);    // STEP 3    ***error thrown at this point***
        int status_no   = int(status);                          // STEP 4

        println(status_no);
      }
    } 

[edit] Though not strictly related to Processing, I found a thread in the following forum that indicates that javascript does not permit substrings within arrays. I guess the same applies to Processing?: https://stackoverflow.com/questions/42429413/javascript-error-array-substring-is-not-a-function

The responder recommends to "slice and then remove the commas" or to use join(''). I have tried to to slice() and join(), based on Processing documentation but it's not working out.

Would anyone know of a way to get around this? Many thanks :)

int findNthChar(String a, char c, int n)

I know to use a while loop but am not too sure of the code within it.

more simple way of a function to determine if a String is numeric?

Thank you all!

Best, Chrisir.... ;-)

void setup() {
  println(isNumeric("---"));
}

void draw() {
  //
}

boolean isNumeric(String testWord) {
  // for int numbers, not float  

  // first we check if a wrong char is present 
  for (int i=0; i<testWord.length(); i++) {
    if ("0123456789-".indexOf(testWord.charAt(i))<0) {
      return false;  // abort with false
    }//if
  }//for

  // second: to avoid that testWord might be "---"
  // we need to find one number at last 
  boolean foundOne = false; 
  for (int i=0; i<testWord.length(); i++) {
    if ("0123456789".indexOf(testWord.charAt(i))>=0) {
      foundOne = true;
    }//if
  }//for

  if (!foundOne) 
    return false; // abort with false

  // do we have a minus?
  if (testWord.contains("-")) {
    // only one minus allowed 
    int countMinus=0;
    for (int i=0; i<testWord.length(); i++) 
      if (testWord.charAt(i)=='-')
        countMinus++;
    if  (countMinus>1) 
      return false;
    // -------------------
    if (testWord.indexOf('-')!=0) // - must be first char like in -12 
      return false;  // abort with false
  }

  return true; // success 
}//func

input = input.substring(2, input.indexOf("\n")); // <-- ??? what is number: 2 ?

just showing the code on 1 of the two files (from Daniel Shiffman), as it is in the correct place (afaik)...

text('hi', 0,0,0); // this will have each 3-D box have 'hi' in the center. I don't know what to replace 'hi' with in order to display the element position of the ArrayList. The text function wants an int value in this position. Conflating this, the code is using push/pop which I am not too familiar with.

class Box {
 PVector pos;
 float r;

 Box(float x, float y, float z, float r_) {
   pos = new PVector(x, y, z);
   r = r_;
 }

 ArrayList<Box> generate() {
  ArrayList<Box> boxes = new ArrayList<Box>();
  for (int x = -1; x < 2; x++) {
    for (int y = -1; y < 2; y++) {
      for (int z = -1; z < 2; z++) {
        float newR = r/3;

        Box b = new Box(pos.x + x*newR,
                        pos.y + y*newR,
                        pos.z + z*newR,
                                  newR);
        int sum = abs(x) + abs(y) + abs(z);
          if (sum > 1) {
            boxes.add(b);
          }
      }
    }
  }
  return boxes;
 }

 void show() {
  pushMatrix();
  translate(pos.x, pos.y, pos.z);
  text(sponge.Box, 0,0,0); // this is where I need help. sponge.Box is incorrect
  noStroke();
  fill(255, 100);
  box(r);
  popMatrix();
 }
}

int x;// assigned to A0 input
int y;// assigned to A1 input
int z; //assigned to D0 input
int votes[3]={0,0,0};

void setup() {
  // initialize the serial communication
  Serial.begin(9600);

  while(!Serial);
}

void loop() {
  // first we need to read the values from the BUTTONS

  x = digitalRead(A0);

  y = digitalRead(A1);

  z = digitalRead(0);

  if(digitalRead(A0) == HIGH) 
    {
    Serial.print("cat1 ");                  
    Serial.print(votes[0]=votes[0]+1);
    Serial.print("\n");
    }
   else if(digitalRead(A1) == HIGH)
    {
    Serial.print("cat2 ");
    Serial.print(votes[1]=votes[1]+1);
      Serial.print("\n");
    }
   else if(digitalRead(0) == HIGH) 
    {
    Serial.print("cat3 ");
    Serial.print(votes[2]=votes[2]+1);
    Serial.print("\n");
    }
    delay(200);
}

I would like the counter to increment every time the button is pressed and display in processing as a bar graph. Whenever the button is pressed, the bar graph goes up by some amount. In this case I want one of the three lines (associated to three buttons) to draw, if pressed.

The processing code is below:

import processing.serial.*;

// Serial Port variables
Serial myPort;
String buff = "";
String buff1 = "";
String buff2 = "";
int index = 0;
int NEWLINE = 10;
// Store the last 256 values from the sensors so we can draw them.
int[] valuesx = new int[256];
int[] valuesy = new int[256];
int[] valuesz = new int[256];

void setup()
{ 
  // set size of the window 
  size(512, 512);
  // turn on anti-aliasing, this makes things look smoother 
  smooth();

  println(Serial.list()); // use this to determine which serial port is your Arduino
  myPort = new Serial(this, Serial.list()[0], 9600);
  myPort.bufferUntil('\n');
}

// draw() happens every frame of the sketch. This is where all the calculations are made.
// When draw() is finished executing, it executes again, over and over.
void draw() {
  // set the background to purple
  background(87, 36, 124);
  // set stroke weight(thickness of the line) to 5 pixels
  strokeWeight(5);

  for (int i = 0; i < 255; i++) {

    stroke(247, i);
    // draw the line (x1, y1, x2, y2)
    line(1, valuesx[i], 1, valuesx[i + 1]);
    line(5, valuesy[i], 5, valuesy[i + 1]);
    line(10, valuesz[i], 10, valuesz[i + 1]);
  }

  // Check the Serial port for incoming data
  while (myPort.available () > 0) {
    // if there is data waiting...
    // execute serialEvent() function. Look below to see how SerialEvent works.
    serialEvent(myPort.read());
  }
}

// serialEvent controls how incoming serial data from the Arduino module is handled
void serialEvent(int serial)
{
  if (serial != NEWLINE) {
    // Store all the characters on the line.
    buff += char(serial);
  } 
  else {
    // The end of each line is marked by two characters, a carriage
    // return and a newline.  We're here because we've gotten a newline,
    // but we still need to strip off the carriage return.
    buff = buff.substring(0, buff.length()-1);
    index = buff.indexOf(",");
    buff1 = buff.substring(0, index);
    buff2 = buff.substring(index+1, buff.length());

    // Parse the String into an integer.  We divide by 4 because
    // analog inputs go from 0 to 1023 while colors in Processing
    // only go from 0 to 255.
    int x = Integer.parseInt(buff1)/2;
    int y = Integer.parseInt(buff2)/2;

    // Clear the value of "buff"
    buff = "";

    // Shift over the existing values to make room for the new one.
    for (int i = 0; i < 255; i++)
    {
      valuesx[i] = valuesx[i + 1];
      valuesy[i] = valuesy[i + 1];
    }

    // Add the received value to the array.
    valuesx[255] = x;
    valuesy[255] = y;
  }
}

Unfortunately, here's the error that I get when I press a button.

What I'm attempting to do is build a program that has a series of "code words" it searches for in a standard text file. If those words appear, some kind of function happens. Here's the basic layout.

Read a text file. Search the text file for the word "on". When "on" is found print a message. From this point forward in the text document, search for "off". When "off" is found print a message. Go back to searching for "on".

When end of the document is reached, I want the program to only search for new data and not keep rereading preexisting data. Essentially I want the program to "remember where it is" so if something updates the text document it doesn't start from the beginning again.

Here is the code I have so far. I've tested it a few times and have run into a problem. The entire file is searched for "on" before the program searches for "off." I want the program to search for "on" until an instance is found in the text file and then from that instance moving forward search for "off."

String codeword1 = "on";
String codeword2 = "off";
int mySwitch = 0;


void setup(){



}

void draw(){
  String [] myfile = loadStrings("C:/Steven/Twitch/Testing Arduino Communication/String Test.txt");
  if (mySwitch == 0){
  for(int i = 0; i < myfile.length; i++){
    String tobesearched = myfile[i];
    int index1 = tobesearched.indexOf(codeword1);
    if (index1 >= 0){
      println("Light will be on");
      delay(1000);
      mySwitch = 1;

    }
    else {
      println("String not found");
      delay(1000);
    }

}
  }
  if (mySwitch == 1){
    for(int i = 0; i < myfile.length; i++){
    String tobesearched = myfile[i];
    int index2 = tobesearched.indexOf(codeword2);
    if (index2 >= 0){
      println("Light will be off");
      delay(1000);
      mySwitch = 0;

    }
    else{
      println("I don't want this text to appear");
      delay(1000);
    }
    }
  }
}

The text file I used to test this program looked like this with each word on its own line in the text file:

Hello
There
on
RandomEntry
off

And the outputs of the programs were:

String not found.
String not found.
Light will be on.
String not found.
String not found.
I don't want this text to appear.
I don't want this text to appear.
I don't want this text to appear.
I don't want this text to appear.
Light will be off.

And then looped back to the beginning. Thanks in advance for any help.

Aunque he estudiado programación en PASCAL hace ya algún tiempo, mis conocimientos de programación están bastante obsoletos, por lo cual el contacto con el JAVA y PROCESSING me está costando mucho trabajo.

Estudiando un poco por aquí y por allí he logrado hacer un código para un programa, pero me da problemas. Y quisiera preguntar si alguno puede ayudarme en este proyecto, que imagino para algunos será relativamente fácil.

El código que he logrado hacer es el siguiente:

import processing.serial.*; //Importamos la librería Serial

Serial port; //Nombre del puerto serie

PrintWriter output; //Para crear el archivo de texto donde guardar los datos

float valorP;//Valor de la presión
float valorH;//Valor de la humedad relativa float valorT;//Valor de la Temperatura int index=0;

{ println(Serial.list()); //Visualiza los puertos serie disponibles en la consola de abajo port = new Serial(this, Serial.list()[1], 9600); //Abre el puerto serie COM3

output = createWriter("Parametros_datos.txt"); //Creamos el archivo de texto, que es guardado en la carpeta del programa

size(800, 400); //Creamos una ventana de 800 píxeles de anchura por 600 píxeles de altura }

void setup() { port.write("p"); //Envia una "p" para que el Arduino lea la presión }

{ //Recibir datos presión del Arduino if(port.available() > 0) // si hay algún dato disponible en el puerto { valorP=port.read();//Lee el dato y lo almacena en la variable "valorP" }

//Visualizamos la presión con un texto text("Presión =",390,200); text(valorP, 520, 200); text(" hPa",547,200);

//Escribimos los datos de la presión con el tiempo (h/m/s) en el archivo de texto output.print(valorP + " hPa "); output.print(hour( )+":"); output.print(minute( )+":"); output.println(second( )); output.println("");

}

{ port.write("h"); //Envia una "h" para que el Arduino lea la humedad y la temperatura

}

void draw()

{ //Recibir datos de Temperatura y Humedad del Arduino if(port.available() > 0) // si hay algún dato disponible en el puerto

{

//Leemos hasta que se encuentre un espacio y guardamos lo leido en Data Data = port.readStringUntil(" "); //buscamos la posición del espacio que separa //los dos valores y guardamos la posición en index index = Data.indexOf(" ");

//almacenamos la primera parte del texto en valorH valorH= Data.substring(0,index); //Almacenamos la segunda parte en valorT valorT= Data.substring(index+1,Data.length()); } } { valor=port.read();//Lee el dato y lo almacena en la variable "valorH" } //Visualizamos la humedad y la temperatura con un texto text("Humedad = ", 390, 300); [color=green] text(valorH, 520, 300); text(" % ", 547, 300); text("Temperatura = ", 630, 300); text(valorT, 520, 547); text(" ºC ", 547, 300);[/color] } { //Escribimos los datos de la temperatura y la humedad con el tiempo (h/m/s) en el archivo de texto output.print(valorHT + " % ºC "); output.print(hour( )+":"); output.print(minute( )+":"); output.println(second( )); output.println("");

}

void keyPressed() //Cuando se pulsa una tecla {

} { //Pulsar la tecla E para salir del programa if(key=='e' || key=='E')

{ output.flush(); // Escribe los datos restantes en el archivo output.close(); // Final del archivo exit();//Salimos del programa } }

Pero no se si está bien porque me da varios errores. Si alguien pudiese echar un vistazo a ver qué está mal, me sería de gran ayuda. Muchas gracias.

String sentence = "The unusually quick brown fox jumps over the lazy family dog repeatedly.";
println(sentence.indexOf("a"));
println(sentence.indexOf("e"));
println(sentence.indexOf("i"));
println(sentence.indexOf("o"));
println(sentence.indexOf("u"));
noLoop();

input "start""message1""end""start""message2""end"

output message1 message2

I am trying to parse a BeerXML file (specification can be found under www.beerxml.com), which is kind of unusual. The structure looks more or less like below.

<?xml version="1.0" encoding="ISO-8859-1"?>
<RECIPES>
   <RECIPE>
     <NAME>Wiezenbock</NAME>
     <VERSION>1</VERSION>
     <TYPE>All Grain</TYPE>
     <BREWER>Panin</BREWER>
     <ASST_BREWER></ASST_BREWER>
     <BATCH_SIZE>20.0000000</BATCH_SIZE>
     <BOIL_SIZE>25.3400000</BOIL_SIZE>
     <BOIL_TIME>70.0000000</BOIL_TIME>
     <EFFICIENCY>70.0000000</EFFICIENCY>
     <HOPS>
        <HOP>
        <NAME>Lublin</NAME>
        <VERSION>1</VERSION>
        <ORIGIN>Poland</ORIGIN>
        <ALPHA>5.0000000</ALPHA>
        </HOP>
        ...
      </HOPS>
       ...
   </RECIPE>
</RECIPES>

And so on. Despite wrong encoding (I will take care of this myself), here are many children, while built-in XML parser reads only one parent - "RECIPES" and only one child - "RECIPE". The XML file is automatically generated by BeerSmith software, so I do not have any possibility to modify the output. Is there any way to properly extract e.g. all values of "NAME" for all found "HOP" within "HOPS"?

How can i achieve this?