Hi everyone,
I am a complete noob with both processing and arduino, but for my final year product design project I am going to need to use both. What I am trying to do is probably really simple, but I just cant seem to get it to work! I am wanting processing to send a simple “hello world” string to arduino via serial, and then for arduino to print it out from a receipt printer.
I have the receipt printer working from the Roo Reynolds using the code:
#include <SoftwareSerial.h>
#include <String.h>
#define rxPin 6
#define txPin 7
SoftwareSerial printer = SoftwareSerial(rxPin, txPin);
const byte command = 0x1B;
const byte fullcut = 0x69;
const byte partialcut = 0x6D;
const byte doubleprint = 0x47;
const byte flipchars = 0x7B;
const byte rotatechars = 0x56;
const byte commandBarcode = 0x1D;
const byte commandBarcodePrint = 0x6B;
const byte commandBarcodeWidth = 0x77;
const byte commandBarcodeHeight = 0x68;
const byte commandBarcodeTextPosition = 0x48;
const byte barcodeNarrow = 0x02;
const byte barcodeMedium = 0x03;
const byte barcodeWide = 0x04;
const byte barcodePrintNone = 0x00;
const byte barcodePrintAbove = 0x01;
const byte barcodePrintBelow = 0x02;
const byte barcodePrintBoth = 0x03;
// (0 = UPC-A, 1 = UPC-E, 2 = JAN13 (EAN), 3 = JAN 8 (EAN),
// 4 = code 39, 5 = ITF, 6 = codabar, 7 = code 128)
const byte barcodeModeUPCA = 0x00;
const byte barcodeModeUPCE = 0x01;
const byte barcodeModeJAN13AEN = 0x02;
const byte barcodeModeJAN8EAN = 0x03;
const byte barcodeModeCODE39 = 0x04;
const byte barcodeModeITF= 0x05;
const byte barcodeModeCODEABAR= 0x06;
const byte barcodeModeCODE128 = 0x07;
void setup() {
pinMode(rxPin, INPUT);
pinMode(txPin, OUTPUT);
printer.begin(9600);
Serial.begin(9600); //open the USB connection too
delay(1000);
feed();
println("Hello Again");
println("\n");
println("\n");
println("\n");
feed();
/*setBarcodeHeight(50);
setBarcodeWidth(barcodeNarrow);
setBarcodeTextPosition(barcodePrintBelow);
printBarcode("123456789012");
feed();
cut();
*/}
void print(char text[]) {
printer.print(text);
}
void println(char text[]) {
printer.println(text);
}
void printBarcode(char barcode[]) {
printBarcode(barcode, barcodeModeUPCA);
}
void feed() {
printer.println("");
printer.println("");
printer.println("");
}
void cut() {
printer.print(command, BYTE);
printer.print(fullcut, BYTE);
}
void partialCut() {
printer.print(command, BYTE);
printer.print(partialcut, BYTE);
}
void printBarcode(char barcode[], byte barcodeMode) {
printer.print(commandBarcode, BYTE); //"[1D]h + [6B]h + n + Dn + [00]h"
printer.print(commandBarcodePrint, BYTE);
printer.print(barcodeMode, BYTE); //barcode system.
printer.print(barcode); //barcode value
printer.print(0x00, BYTE); //end barcode sequence
}
void setBarcodeHeight(byte height) { //in dots. default = 162
printer.print(commandBarcode, BYTE); //"[1d]H + [68]H + N"
printer.print(commandBarcodeHeight, BYTE);
printer.print(height, BYTE); //barcode height in dots. default = 162
}
void setBarcodeWidth(byte width) { // 2, 3 or 4. default = 3
if (width < 2) width = 2;
if (width > 4) width = 4;
printer.print(commandBarcode, BYTE); //"[1d]H + [77]H + N" (where N = 2, 3 or 4)
printer.print(commandBarcodeWidth, BYTE);
printer.print(width, BYTE);
}
void setBarcodeTextPosition(byte position) {
if (position < 0) position = 0;
if (position > 3) position = 3;
printer.print(commandBarcode, BYTE); // "[1d]H + [48]H + N"
printer.print(commandBarcodeTextPosition, BYTE);
printer.print(position, BYTE); // 0 = none, 1 = above, 2 = below, 3 = both
}
void setDoublePrintOn() {
setDoublePrint(0x01);
}
void setDoublePrintOff() {
setDoublePrint(0x00);
}
void setDoublePrint(byte mode) {
printer.print(command, BYTE);
printer.print(doubleprint, BYTE);
printer.print(mode, BYTE);
}
void loop() {
// while there are bytes to read from the computer, retransmit them
if (Serial.available() > 0) {
char string1 = Serial.read();
if(string1 != "Stop") {
byte inchar = Serial.read();
printer.print(inchar);
printer.println(string1);
}
}
}
and am using a simple processing code to send “hello world” on mousePressed:
import processing.serial.*;
Serial myPort;
int val;
void setup() {
String portName = Serial.list()[0];
myPort = new Serial (this, portName, 9600);
}
void draw() {
if(mousePressed) {
myPort.write("hello");
}
else {
myPort.write("Stop");
}
}
I know this is probably a really simple problem, but everything I try doesnt seem to work. I thought it might be a pointers problem, but have not been able to sort it out.
Sorry if this is really simple, but hopefully this will mean it can be solved quickly.