EM5820 Thermal Printer - Serial Interface TTL

/*
The EM5820 Thermal Printer with a serial interface can be easily connected to an Arduino using the SoftwareSerial library. Here's an example code to print text and a simple horizontal line using the EM5820 Thermal Printer:

This code initializes the printer, configures the print settings, and then prints text followed by a horizontal line.

Connect the EM5820 Thermal Printer to the Arduino as follows:

VCC pin to 5V (or the appropriate voltage for your printer)
GND pin to GND
RX pin to digital pin 3 on the Arduino
TX pin to digital pin 2 on the Arduino
Please note that you may need to adjust the pin numbers in the code depending on the specific pins you choose to use for connecting the printer to your Arduino. Additionally, make sure that the EM5820 printer is powered by a power supply with enough current to operate properly, as the Arduino's onboard 5V regulator might not provide sufficient power.
*/
#include <Arduino.h>
#include <SoftwareSerial.h>

const int printerRxPin = 2; // Connect this pin to the TX pin of the printer
const int printerTxPin = 3; // Connect this pin to the RX pin of the printer

SoftwareSerial printerSerial(printerRxPin, printerTxPin);

void setup() {
  Serial.begin(9600);
  printerSerial.begin(9600);
  delay(500); // Allow time for the printer to initialize

  // Configure printer
  printerSerial.write(27); // ESC
  printerSerial.write(64); // @ - Initialize printer

  printerSerial.write(27); // ESC
  printerSerial.write(55); // 7 - Print settings
  printerSerial.write(7);  // Heating dots (7 - max heat)
  printerSerial.write(100); // Print and feed time (100 * 10 microseconds)
  printerSerial.write(20); // Heating time (20 * 10 microseconds)

  // Print text
  printerSerial.print("Hello, EM5820 Thermal Printer!\n");

  // Print a horizontal line
  for (int i = 0; i < 32; i++) {
    printerSerial.write(0xFF);
  }
  printerSerial.write('\n');
}

void loop() {
  // Nothing to do in the loop
}