void fetchData() error?
in
Integration and Hardware
•
2 months ago
Hello,
I'm working through a sketch (Example 08A and B) from the Makezine Getting Started With Arduino text.
I keep getting the same error message: unexpected token: void in reference to line 122 of the code.
I've triple checked sketch for errors, found some fixed em; still getting the same error. I read some forum posts that suggested import java.lang.*; and some others so far no luck. There was another post that suggested running it on Processing 1.5.1 but I got the same message: unexpected token: void in reference to line 122 of the code.
I must have missed something or there is something I'm ignorant to. I would hugely appreciate thoughts on this dilemma. Here is the code as I wrote it directly from the book:
import processing.serial.*;
String feed = "http://blog.makezine.com/index.xml";
int interval = 10; //retrieve feed every 60 sec
int lastTime; // the last time we fetched the content
int love = 0;
int peace = 0;
int arduino = 0;
int light = 0; // light level measured by lamp
Serial port;
color c;
String cs;
String buffer = ""; // Accumulates characters coming from Arduino
PFont font;
void setup() {
size(640,480);
frameRate(10); // we dont need fast updates
font = loadFont("HelveticaNeue-Bold-32.vlw");
fill(255);
textFont(font, 32);
// Important Note:
// The first serial port retrieved by Serial.list() should be
// your Arduino. If not, uncomment the next line by deleting
// the // before it, and re-run the sketch to see a list of serial
// ports. Then, change the 0 between [ and ] to the number of the
// port that your Arduino is connected to.
//println(Serial.list());
String arduinoPort = Serial.list()[0];
port = new Serial(this, arduinoPort, 9600); // connect to Arduino
lastTime = 0;
fetchData();
}
void draw() {
background( c );
int n = (interval - (millis()-lastTime/1000));
// Build color based on the 3 values
c = color(peace, love, arduino);
cs = "#" + hex(c,6); // Prepare a string to be sent to Arduino
text("Arduino Networked Lamp", 10,40);
text("Reading feed:", 10, 100);
text(feed, 10, 140);
text("Next update in "+ n + " seconds",10,450);
text("peace" ,10,200);
text(" " + peace, 130, 200);
rect(200,172, peace, 28);
text("love " ,10,240);
text(" " + love, 130, 240);
rect(200,212, love, 28);
text("arduino ",10,280);
text(" " + arduino, 130, 280);
rect(200,252, arduino, 28);
// write the color string to the screen
text("sending", 10, 340);
text(cs, 200,340);
text("light level", 10, 380);
rect(200, 352,light/10.23,28); // this turns 1023 into 100
if (n <= 0) {
fetchData();
lastTime = millis();
}
port.write(cs); // send data to Arduino
if (port.available() > 0) { // check if there is data waiting
int inByte = port.read(); // read one byte
if (inByte != 10) { // if byte is not newline
buffer = buffer + char(inByte); // just add it to the buffer
}
else {
// newline reached, lets process the data
if (buffer.length() > 1) { // make sure there is enough data
// chop off the last character, it's a carriage return
// (a carriage return is the character at the end of a
// line of text)
buffer = buffer.substring(0,buffer.length() -1);
//turn the buffer from string into an integer number
light = int(buffer);
// clean the buffer for the next read cycle
buffer = "";
// We're likely falling behind in taking readings
// from Arduino. So let's clear the backlog of incoming
// sensor readings so the next reading is up to date.
port.clear();
}
}
}
void fetchData() {
// we use these strings to parse the feed
String data;
String chunk;
// zero the counters
love = 0;
peace = 0;
arduino = 0;
try {
URL url = new URL(feed); // An object to represent the URL
// prepare a connection
URLConnection conn = url.openConnection();
conn.connect(); // now connect to the Website
// this is a bit of virtual plumbing as we connect
// the data coming from the connection to a buffered
// reader that reads the data one line at a time.
BufferedReader in = new
BufferedReader(new InputStreamReader(conn.getInputStream()));
// read each line from the feed
while ((data = in.readLine()) != null) {
StringTokenizer st =
new StringTokenizer(data,"\"<>,.()[] ");//break it down
while (st.hasMoreTokens()) {
// each chunk of data is made lowercase
chunk= st.nextToken().toLowerCase() ;
if (chunk.indexOf("love") >= 0) // found "love"?
love++; // increment love by 1
if (chunk.indexOf("peace") >= 0) // found "peace"?
peace++; // increment peace by 1
if (chunk.indexOf("arduino") >= 0) // found "arduino"?
arduino++; // increment arduino by 1
}
}
// Set 64 to be the maximum number of references we care about.
if (peace > 64) peace = 64;
if (love > 64) love = 64;
if (arduino > 64) arduino = 64;
peace = peace * 4; // multiply by 4 so that the max is 255
love = love * 4; // which comes in handy when building a
arduino = arduino * 4 // color that is made of 4 bytes (ARGB)
}
catch (Exception ex) { // If there was an error, stop the sketch
ex.printStackTrace();
System.out.println("ERROR: "+ex/getMessage());
}
}
I'm working through a sketch (Example 08A and B) from the Makezine Getting Started With Arduino text.
I keep getting the same error message: unexpected token: void in reference to line 122 of the code.
I've triple checked sketch for errors, found some fixed em; still getting the same error. I read some forum posts that suggested import java.lang.*; and some others so far no luck. There was another post that suggested running it on Processing 1.5.1 but I got the same message: unexpected token: void in reference to line 122 of the code.
I must have missed something or there is something I'm ignorant to. I would hugely appreciate thoughts on this dilemma. Here is the code as I wrote it directly from the book:
import processing.serial.*;
String feed = "http://blog.makezine.com/index.xml";
int interval = 10; //retrieve feed every 60 sec
int lastTime; // the last time we fetched the content
int love = 0;
int peace = 0;
int arduino = 0;
int light = 0; // light level measured by lamp
Serial port;
color c;
String cs;
String buffer = ""; // Accumulates characters coming from Arduino
PFont font;
void setup() {
size(640,480);
frameRate(10); // we dont need fast updates
font = loadFont("HelveticaNeue-Bold-32.vlw");
fill(255);
textFont(font, 32);
// Important Note:
// The first serial port retrieved by Serial.list() should be
// your Arduino. If not, uncomment the next line by deleting
// the // before it, and re-run the sketch to see a list of serial
// ports. Then, change the 0 between [ and ] to the number of the
// port that your Arduino is connected to.
//println(Serial.list());
String arduinoPort = Serial.list()[0];
port = new Serial(this, arduinoPort, 9600); // connect to Arduino
lastTime = 0;
fetchData();
}
void draw() {
background( c );
int n = (interval - (millis()-lastTime/1000));
// Build color based on the 3 values
c = color(peace, love, arduino);
cs = "#" + hex(c,6); // Prepare a string to be sent to Arduino
text("Arduino Networked Lamp", 10,40);
text("Reading feed:", 10, 100);
text(feed, 10, 140);
text("Next update in "+ n + " seconds",10,450);
text("peace" ,10,200);
text(" " + peace, 130, 200);
rect(200,172, peace, 28);
text("love " ,10,240);
text(" " + love, 130, 240);
rect(200,212, love, 28);
text("arduino ",10,280);
text(" " + arduino, 130, 280);
rect(200,252, arduino, 28);
// write the color string to the screen
text("sending", 10, 340);
text(cs, 200,340);
text("light level", 10, 380);
rect(200, 352,light/10.23,28); // this turns 1023 into 100
if (n <= 0) {
fetchData();
lastTime = millis();
}
port.write(cs); // send data to Arduino
if (port.available() > 0) { // check if there is data waiting
int inByte = port.read(); // read one byte
if (inByte != 10) { // if byte is not newline
buffer = buffer + char(inByte); // just add it to the buffer
}
else {
// newline reached, lets process the data
if (buffer.length() > 1) { // make sure there is enough data
// chop off the last character, it's a carriage return
// (a carriage return is the character at the end of a
// line of text)
buffer = buffer.substring(0,buffer.length() -1);
//turn the buffer from string into an integer number
light = int(buffer);
// clean the buffer for the next read cycle
buffer = "";
// We're likely falling behind in taking readings
// from Arduino. So let's clear the backlog of incoming
// sensor readings so the next reading is up to date.
port.clear();
}
}
}
void fetchData() {
// we use these strings to parse the feed
String data;
String chunk;
// zero the counters
love = 0;
peace = 0;
arduino = 0;
try {
URL url = new URL(feed); // An object to represent the URL
// prepare a connection
URLConnection conn = url.openConnection();
conn.connect(); // now connect to the Website
// this is a bit of virtual plumbing as we connect
// the data coming from the connection to a buffered
// reader that reads the data one line at a time.
BufferedReader in = new
BufferedReader(new InputStreamReader(conn.getInputStream()));
// read each line from the feed
while ((data = in.readLine()) != null) {
StringTokenizer st =
new StringTokenizer(data,"\"<>,.()[] ");//break it down
while (st.hasMoreTokens()) {
// each chunk of data is made lowercase
chunk= st.nextToken().toLowerCase() ;
if (chunk.indexOf("love") >= 0) // found "love"?
love++; // increment love by 1
if (chunk.indexOf("peace") >= 0) // found "peace"?
peace++; // increment peace by 1
if (chunk.indexOf("arduino") >= 0) // found "arduino"?
arduino++; // increment arduino by 1
}
}
// Set 64 to be the maximum number of references we care about.
if (peace > 64) peace = 64;
if (love > 64) love = 64;
if (arduino > 64) arduino = 64;
peace = peace * 4; // multiply by 4 so that the max is 255
love = love * 4; // which comes in handy when building a
arduino = arduino * 4 // color that is made of 4 bytes (ARGB)
}
catch (Exception ex) { // If there was an error, stop the sketch
ex.printStackTrace();
System.out.println("ERROR: "+ex/getMessage());
}
}
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