DFR0503-EN Embedded Thermal Printer - TTL Serial

Introduction

The embedded thermal printer uses thermal technology, it doesn't need to add toner or ink, stable performance and mini size. The embedded thermal printers are widely used in instrumentation, food inspection, shopping terminals and other scenarios. It can be found in the ATM machines, lockers, POS and supermarket electronic scales in the life. The printer uses a 5~9V wide voltage supply mode. The higher the voltage, the clearer the printing effect. It is suitable for thermal paper rolls with a width of 58MM and able to provide a print life of 50 kilometers. It supports Arduino, Raspberry Pi, and Windows System. We can refer to the instruction set and use the USB serial port or TTL communication interface to send corresponding commands to the thermal printer. Then the printer will instantly print out the text, characters, barcode, QR code and even black and white pictures according to the instructions; we can connect it to the Arduino controller or the Raspberry Pi by a serial port. Combining with various sensors, we can DIY all kinds of practical instruments such as electronic scale, blood pressure index measuring instrument, soil element analyzer and driving recorder. Besides, we can also make a small ticket printer of our own. The content on the small ticket can be defined by ourselves. After further development, we can even realize the remote printing function.

warning_yellow.png NOTE:

Specification

Pinout

DFR0503-EN Embedded Thermal Printer - TTL Serial Pinout

TTL Communication Interface

Number Name Description
1 GND Ground
2 DTR Flow Control
3 RXD Receive Data
4 TXD Transmit Data
5 NC Not Connected

Power Interface

Number Name Description
1 VCC 5-9V
2 GND Ground

Tutorial

Preparation

Connection Diagram

DFR0503-EN Embedded Thermal Printer - TTL Serial Connection Diagram

DFR0503-EN Embedded Thermal Printer - TTL Serial Put the thermal paper into the printer)

1.Create a hz.c file, the content should be a created character array. (How to create a .c file? Create a .txt file and revise the suffix to .c)

const char hz[][32] is a statement of a character string array in fact. One string cannot exceed 32 bytes (16-bit Chinese character coded in GB2312). If you want to display a long Chinese character, you need to revise the number “32”; actually, in other words, it means to take out all Chinese characters and put them into a array. An international program version can be easily realized by this way since we can display different language by just switching the array;

Note : The creation of this file aims to solve the problem that GB2312 Chinese character internal code cannot be edited under IDE Programming Environment. So don’t open the file in IDE programming environment in case the file is rewritten into UTF8 internal code file.

 const char hz[][32]={
"DFROBOT",             //0
"极趣科技",             //1
"嵌入式热敏打印机",     //2
"arduino开发控制",     //3
"DIY趣味",             //4
"让我们一起共创未来",     //5
"打造我们的DIY世界",     //6
};

2.Compose Program

#include"C:\Users\Administrator\Documents\Arduino\uart_dayinji\hz.c"     //Reference the hz.c file created before, the content of the quotation should be the index address of the hz.c file, and it need to be revised according to hz.c actual address. 
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
void setup()
{
  mySerial.begin(9600);
}
void loop() 
{
  mySerial.println();
  mySerial.println();
  mySerial.println("DFROBOT");
  mySerial.println();
  mySerial.println(hz[0]);                                       
  mySerial.println(hz[1]);                                       
  mySerial.println(hz[2]);
  mySerial.println(hz[3]);
  mySerial.println(hz[4]);
  mySerial.println(hz[5]);
  mySerial.println(hz[6]);
  mySerial.println();
  mySerial.println();
  mySerial.println();
  delay(10000);
}

3.The following characters will be displayed on the thermal ticket roll.

DFROBOT
极趣科技
嵌入式热敏打印机
arduino开发控制
DIY趣味
让我们一起共创未来
打造我们的DIY世界`

Write the print instructions of QR code and barcode in accordance with the reference of General Instruction Set and Special Instruction Set.

#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX

/*--------Print barcode instruction, including information  “DFR0503”---------*/
char bar_code[24]={
  0x1b, 0x40,                                                                            
  0x1d, 0x48, 0x02,  //the 43rd command of the general instruction, select the print address of the information (HRI character)included in the barcode.0×02 means that the printed information should be below the barcode.   
  0x1d, 0x68, 0x64,  //set barcode height, range”1~255”, here we set it to “0×64” .
  0x1d, 0x77, 0x03,  //the 45th command of the general instruction, set horizontal width, here we select “0×03”.                                          
  0x1d, 0x6b, 0x49, 0x09, 0x7B, 0x42, 0x44, 0x46, 0x52, 0x7B, 0x43, 0x05, 0x03   //set the information included in barcode. Barcode length “0×09” correspond to ”DFR0503”. “0×44, 0×46, 0×52” are ACILL codes of the three letter D,F,R respectively. “0×05, 0×03” is “0503”.
};     //if the information is “DFR050308”, the barcode length should be”0×0B”, and so on.

/*--------Print QR code instruction, including information”www.dfrobot.com”---------*/
const char QRx[60]={
0x1b,0x40,                                                                                 
0x1d,0x28,0x6b,0x03,0x00,0x31,0x43,0x05,  //Refer to the 1st command of special instruction set.QR code size “0×05”
0x1d,0x28,0x6b,0x03,0x00,0x31,0x45,0x30,   //Set QR code verification level to L.
0x1d,0x28,0x6b,0x12,0x00,0x31,0x50,0x30,0x77,0x77,0x77,0x2E,0x64,0x66,0x72,0x6F,0x62,0x6F,0x74,0x2E,0x63,0x6F,0x6D,   //“0x12” is the number of the character(15) of the information”www.dfrobot.com” that was included in QR code plus 3.                                                                     //“0x77,0x77,0x77,0x2E,0x64,0x66,0x72,0x6F,0x62,0x6F,0x74,0x2E,0x63,0x6F,0x6D” are the ACILL code of the characters of the website address.
0x1b,0x61,0x01,  //centre the graphic
0x1d,0x28,0x6b,0x03,0x00,0x31,0x52,0x30,   //Verify the QR code
0x1d,0x28,0x6b,0x03,0x00,0x31,0x51,0x30   //print the QR code
};       
void setup(){  
  mySerial.begin(9600);
  Serial.begin(9600);  
  while(Serial.read()>= 0){}
  }
void loop(){
  mySerial.println();
  mySerial.print("---------------------------------"); 
  mySerial.println();
  mySerial.write(bar_code,60);     //send “print barcode instruction” to printer       
  delay(5);
  mySerial.println();
  mySerial.write(QRx,60);        //send “print QR code instruction” to printer.
  mySerial.println();
  mySerial.print("---------------------------------"); 
  delay(5000);
}
unsigned char  show[] = {
0x1B,0x2A,0x20,0xFA,0x00,   //Bitmap size: 24*250, revise parameter with the reference of general instruction set 34 and 35.
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x00,0x00,0xFE,0x00,0x00,0xFE,0x00,0x01,0xFF,
0x00,0x01,0xFF,0x80,0x03,0xFF,0x80,0x03,0xEF,0x80,0x07,0xEF,0xC0,0x07,0xC7,0xC0,0x07,0xC7,0xC0,0x07,0xC7,0xC0,0x07,0xC7,0xE0,0x0F,0x83,0xE0,
0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x81,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,
0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,
0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x1F,0x01,0xF0,0x0F,0x81,0xF0,0x0F,0x83,0xE0,
0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0xC7,0xE0,0x07,0xC7,0xC0,0x07,0xC7,0xC0,0x07,0xC7,0xC0,0x07,
0xEF,0xC0,0x03,0xEF,0x80,0x03,0xFF,0x80,0x01,0xFF,0x80,0x01,0xFF,0x00,0x00,0xFE,0x00,0x00,0xFE,0x00,0x00,0x38,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x01,0xFF,0x80,0x03,0xFF,0xC0,0x03,0xFF,0xC0,0x03,0xFF,0xC0,0x03,0xFF,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,
0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,
0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x0F,0xE7,0xF0,
0x1F,0xE7,0xF8,0x1F,0xE7,0xF8,0x1F,0xE7,0xF8,0x1F,0xC3,0xF8,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0xC1,0xF0,0x07,0xC3,0xE0,0x07,
0xC3,0xE0,0x07,0xC3,0xE0,0x07,0xC3,0xE0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x03,0xE7,0xC0,0x01,0xFF,0x80,0x01,0xFF,0x80,0x01,0xFF,
0x80,0x01,0xFF,0x80,0x00,0xFF,0x80,0x00,0xFF,0x00,0x00,0xFF,0x00,0x00,0xFF,0x00,0x00,0x7F,0x00,0x00,0x7E,0x00,0x00,0x7E,0x00,0x00,0x7E,0x00,
0x00,0x7E,0x00,0x00,0x3C,0x00,0x00,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xFF,0x80,0x03,0xFF,0xC0,0x07,0xFF,0xC0,0x07,0xFF,0xE0,0x07,0xFF,0xE0,
0x07,0xC3,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,
0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF8,0x0F,0x80,0xF8,0x0F,0x80,0xF8,0x0F,0x80,0xF8,0x0F,0x80,0xF8,0x0F,0x81,0xF8,0x0F,0x81,0xF0,0x0F,0x81,
0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,
0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,
0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,
0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xF0,0x0F,0x81,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x0F,0x83,0xE0,0x07,0xC3,0xE0,0x07,0xFF,0xE0,0x07,0xFF,0xE0,
0x07,0xFF,0xC0,0x03,0xFF,0xC0,0x01,0xFF,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0d,0x0a,
0x1B,0x40,
0x1b,0x2a,0x00,0x0C,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,                                                       //Print a division line                            
0x1B,0x33,0x00,
0x0A,
0x1D,0x2F,0x30                                                                                                                              //Print bitmap instruction

};

3.Compose program and send instruction

#include <SoftwareSerial.h>
#include"D:\image.h"   //Reference the created image.h file, and revise address according to the actual condition.
SoftwareSerial mySerial(10, 11); // RX, TX

/*--------Print barcode instruction, including "DFR0503"---------*/
char picture_S[6]={
  0x1b, 0x40,                                                                               
  0x1d, 0x2A, 0x14,0x0A    //Refer to general instruction set 34 and 35, get 0×14 and 0×0A by calculating bitmap size.
};                                                                                                                                              
char picture_E[3]={
 0xID,0x2F,0x30
};  

void setup(){  
  mySerial.begin(9600);
  Serial.begin(9600);  
  while(Serial.read()>= 0){}
  }
void loop(){
  mySerial.println();
  mySerial.print("---------------------------------"); 
  mySerial.println();

  mySerial.write(show,2237);     //Send “print bitmap instruction” to printer

  mySerial.println();
  mySerial.print("---------------------------------"); 
  delay(5000);
}

Sample Code

Input "Mike" to Serial Port Assistant, after sending it to uno, the printer will print “Name: Mike”; when sending "1520000** ", it will be recognized as a telephone number, and the printer will print "Tel: 1520000** "; Input a words beginning as : "this is a test", it will be recognized as a remark, and the printer will print "Remarks:"

#include "SoftwareSerial.h"
#include "Wire.h"  
char buffer[30]; 
SoftwareSerial mySerial(10, 11); // RX, TX
String comdata = "";
char  comdataX;
int numdata;
void setup()
{ 
  mySerial.begin(9600);
  Serial.begin(9600);  
  while(Serial.read()>= 0){}
}
void loop() 
{
  //Serial_pc();
  Serial_pc1();
}
void Serial_pc()
{ 
while(Serial.available()>0){    
    delay(100);  
    mySerial.print("DFROBOT:");  
    numdata = Serial.readBytes(buffer,30); 
    mySerial.print(buffer);      
    }
    for(int i=0; i<30; i++) 
    buffer[i]=0;
}
void Serial_pc1()
{
 while(Serial.available()>0){  
     delay(100);  
     numdata = Serial.readBytes(buffer,30); 

  if(buffer[0]>'/'&&buffer[0]<':')
     {
      mySerial.print("Tel:");
      mySerial.println(buffer); 
      }
  else if(buffer[0]>'@'&&buffer[0]<'{')
    {
      mySerial.print("Name:");
      mySerial.println(buffer);  
      }
  else if(buffer[0]=='*')
    {
      mySerial.print("Remarks:");
      mySerial.println(buffer);  
     }
  else{;}            
  }
  for(int i=0; i<30; i++) 
  buffer[i]=0;
}

FAQ

Q&A Some general Arduino Problems/FAQ/Tips
A Please click the topic link on DFRobot Forum.
A For any questions, advice or cool ideas to share, please visit the DFRobot Forum.

More Documents

DFshopping_car1.png Get embedded thermal printer from DFRobot Store or DFRobot Distributor.

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