Processing and Serial.print Error

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Processing and Serial.print Error

in Integration and Hardware • 1 year ago

Hi so Im working out a new code that sends the serial of a letter to the arduino but I keep getting an error in Serial.print.

The error states: The function print(char) does not exist.

The code itself has "Serial." in the color black and "print" in the color orange.

Here is the code:

import processing.serial.*; //Import the serial library into your sketch
import cc.arduino.*; //Import the Arduino-Firmata library into your sketch
Arduino arduino; //Create an instance of Arduino named arduino (can be any name)
char e;
int ledPin;
char serial;
Serial scope;
String adaptor= "/dev/tty.usbmodem1a21";
void portConnect(){
int portNumber = 99;
String [] ports;
println(Serial.list());
ports = Serial.list();
for(int j = 0; j< ports.length; j++) {
if(adaptor.equals(Serial.list()[j])) portNumber = j;
}
if(portNumber == 99) portNumber = 0;
String portName = Serial.list()[portNumber];
println("Connected to "+portName);
scope = new Serial(this, portName, 9600);
scope.bufferUntil(10);
}
/*
Serial scope; // Create object from Serial class
//**************** Change this to match the device driver you are using *****************
String adaptor = "/dev/tty.usbserial-FTEJUA6O"; // the name of the device driver to use change it to what you have
// call this from setup()
void portConnect(){ // Open the port that the controller is connected to
// **********************************
// if the device you are looking for is
// not available the program will
// connect to the first one in the list
// ************************************
int portNumber = 99;
String [] ports;
// println(Serial.list()); // uncomment for full list of serial devices
ports = Serial.list();
for(int j = 0; j< ports.length; j++) {
if(adaptor.equals(Serial.list()[j])) portNumber = j;
} // go through all ports
if(portNumber == 99) portNumber = 0; // if we haven't found our port then connect to the first one
String portName = Serial.list()[portNumber];
println("Connected to "+portName);
scope = new Serial(this, portName, 19200); // baud rate defined here
scope.bufferUntil(10); // call serialEvent() every line feed
}
*/
void serialEvent(Serial scope) { // this gets called every time a line feed is received
String recieved = scope.readString() ;
println(recieved + " from serial port"); // show it at the bottom of the processing window
// also do the stuff you want to do when you get things back from the arduino
}
void setup() {
size(200, 200);
print(arduino.list());
arduino = new Arduino(this, Arduino.list()[0], 9600); //defines arduino our board and sets the communication rate
arduino.pinMode(ledPin, Arduino.OUTPUT);
}
void keyPressed() {
print(key);
delay(10);
switch (key) {
case 'e':
case 'E':
Serial.print('e');
break;
case 'i':
case 'I':
Serial.print( 'i' );
break;
case 'q':
case 'Q':
Serial.print( 'q' );
break;
}
};
void keyReleased() {
delay(10);
switch (key) {
case 'e':
case 'E':
Serial.print( 'z' );
break;
case 'i':
case 'I':
Serial.print( 'p');
break;
case 'q':
case 'Q':
Serial.print( 'l');
break;
}
};

If you have any ideas what I am doing wrong, that would be greatly appreciated.

ALSO: I want to communicate this wirelessly (using xbee), what baud rate would you recommend for the best communication?

thanks, Matt

Replies(1)

PhiLho

Re: Processing and Serial.print Error

1 year ago

In general (there are exceptions, but probably not here), you don't use the name of the class to access a function (called a method when it is in a class), but the name of the created object.
So I think it should be scope.print(...)
That's because scope has information needed to do the operation, here the serial port settings, etc.

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