the serial communication is working fine but the thermal printer is not printing not even in the setup. The printer is working fine when loading the example code from the adafruit library. We tried also to use 2 different type of library: adafruit_thermal and pos_printer. Both arent working.
Thank you we solved the problem.
But we have another one. With whatever code we are using to print, there is always an "8" before each printed line. ( and sometimes "88")
#include "Pos_Printer.h"
#include "hal9klogo.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <NewPing.h>
LiquidCrystal_I2C lcd1(0x25, 16, 2);
LiquidCrystal_I2C lcd2(0x26, 16, 2);
#define TRIGGER_PIN 4
#define ECHO_PIN 2
#define MAX_DISTANCE 200
#include "SoftwareSerial.h"
#define TX_PIN 8
#define RX_PIN 7
SoftwareSerial mySerial(RX_PIN, TX_PIN);
Pos_Printer printer(&mySerial);
const int buttonPin1 = 3;
const int buttonPin2 = 5;
const int buttonPin3 = 6;
int buttonState1 = 0;
int buttonState2 = 0;
int buttonState3 = 0;
int incomingByte;
bool printFlag1 = false;
bool printFlag2 = false;
bool printFlag3 = false;
String minutes = "";
String seconds = "";
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
void setup() {
pinMode(7, OUTPUT); digitalWrite(7, LOW);
mySerial.begin(9600);
//Serial1.begin(9600);
printer.begin();
printer.printBitmap(Hal9klogo_width, Hal9klogo_height, Hal9klogo_data);
printer.feed(8);
delay(1000);
pinMode(9, OUTPUT);
digitalWrite(9, LOW);
Serial.begin(9600);
lcd1.init();
lcd1.backlight();
lcd2.init();
lcd2.backlight();
pinMode(buttonPin1, INPUT);
pinMode(buttonPin2, INPUT);
pinMode(buttonPin3, INPUT);
printer.sleep();
delay(3000L);
printer.wake(); // MUST wake() before printing again, even if reset
printer.setDefault(); // Restore printer to defaults
}
void loop() {
buttonState1 = digitalRead(buttonPin1);
buttonState2 = digitalRead(buttonPin2);
buttonState3 = digitalRead(buttonPin3);
if (buttonState1 == HIGH) {
Serial.println("1");
}
if (buttonState2 == HIGH) {
Serial.println("2");
}
if (buttonState3 == HIGH) {
Serial.println("3");
}
int distance = sonar.ping_cm();
if (distance > 0) {
Serial.println("YES");
lcd1.setCursor(0, 0);
lcd1.print("Seleziona");
lcd1.setCursor(0, 1);
lcd1.print("prodotto");
lcd2.setCursor(0, 0);
lcd2.print("Seleziona");
lcd2.setCursor(0, 1);
lcd2.print("prodotto");
} else {
Serial.println("NO");
lcd1.clear();
lcd2.clear();
}
if (Serial.available() > 0) {
incomingByte = Serial.read();
Serial.print("Received: ");
Serial.println(incomingByte);
if (incomingByte == 7 && !printFlag1) {
Serial.println("Received 7; Printing...");
printFlag1 = true; // Set the flag to true to prevent repeated printing
// Add delay after printing
printer.println(F("HO STAMPATO DOPO SCENA 7"));
printer.print(minutes);
printer.print(seconds);
printer.feed(9);
delay(500); // Adjust delay time
printer.sleep();
delay(3000L);
printer.wake();
printer.setDefault();
}
if (incomingByte == 8 && !printFlag2) {
Serial.println("Received 8; Printing...");
printFlag2 = true; // Set the flag to true to prevent repeated printing
// Add delay after printing
printer.println(F("HO STAMPATO DOPO SCENA 8"));
printer.print(minutes);
printer.print(seconds);
printer.feed(9);
delay(500); // Adjust delay time
printer.sleep();
delay(3000L);
printer.wake();
printer.setDefault();
}
if (incomingByte == 9 && !printFlag3) {
Serial.println("Received 9; Printing...");
printFlag3 = true; // Set the flag to true to prevent repeated printing
// Add delay after printing
printer.println(F("HO STAMPATO DOPO SCENA 9"));
printer.print(minutes);
printer.print(seconds);
printer.feed(9);
delay(500); // Adjust delay time
printer.sleep();
delay(3000L);
printer.wake();
printer.setDefault();
}
}
}
if you could resole the problem of the "8" it would be fantastic.
An additional problem is the printing of a timer. On the p5.js file we wrote the serial.write of the minutes and seconds but arduino cant read and print it.
Could you help us with both problems.
Thank you very much!
The "8", or "88" appear on the printout?
What does the Serial.print debug tell?
I suggest You use test-Serial.print to catch it. Know the difference between ASCII character and the binary reperesentation of the character.
this is what the printer prints
i'm not sure i understand what you mean with Serial.print debug. The problem is that this happens with every code i tried using
