Euro sign

or to make it really simple

void setup() {
  Serial.begin(9600);
  }
  Serial.println("Printing the Euro symbol");
}
int thisByte = 128;

void loop() {
  Serial.write(thisByte);
delay(1000);
}

Hallo Peter ,

do you know how I get the Euro sign in same row with the Price ?

why I get gobbledygook letter in my Serial monitor ?

Thx

Rita

Can you provide the sketch you are running for this

Thanks

Hallo Peter ,

here is my sketch :

/*
* RFID/NFC module for Arduino. 
* Calculation the total price  
*/


uint8_t dataRX[35];//Receive buffer.
uint8_t dataTX[35];//Transmit buffer. 
uint8_t _UID[4];// stores the UID (unique identifier) of a card.
uint8_t keyAccess[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF } ;// stores the key or password.
uint8_t address = 0x04;//Address to read.
uint8_t ATQ[2];//Answer to request
uint8_t state;//state of the process
uint8_t aux[16];//Auxiliar buffer. 
unsigned int TotalPrice = 0;// Varialbe




void setup()
{
   //Start serial port 115200 bps:
   Serial.begin(115200);
   delay(100);
   Serial.print("Welcome dear customer");
   delay(1000);
   //!It is needed to launch a simple command to sycnchronize
   getFirmware();
   configureSAM();
}
int thisByte = 128;


void loop()
{
   Serial.print("\n");
   /////////////////////////////////////////////////////////////
   //Get the UID Identifier
   init(_UID, ATQ);
   Serial.print("\n");
   /////////////////////////////////////////////////////////////
   //Auntenticate a block with his keyAccess
   state = authenticate(_UID, address, keyAccess);
   Serial.print("\n");


   if ( state == 0) {
      Serial.println("Authentication block OK");
   } else {
   Serial.println("Authentication failed");
   }
   /////////////////////////////////////////////////////////////
   //Read from address after authentication
   state = readData(address, aux);
   Serial.print("\n");


   if (state == 0) {
      Serial.println("Read Price ok ");
   } else {
      Serial.println("Read failed");
   }


   Serial.print("\n");
   Serial.print("Price : ");
   print(aux ,1); 
   Serial.write(thisByte);
   Serial.print("\n");
   delay(2000);


// Tota l price 


  TotalPrice = TotalPrice + aux[0]; 
  Serial.print("TotalPrice : "); 
  Serial.println(TotalPrice,1);
  Serial.write(thisByte);
  delay(1000);
}


//**********************************************************************
//!The goal of this command is to detect as many targets (maximum MaxTg)
// as possible in passive mode.
uint8_t init(uint8_t *UID , uint8_t *ATQ)   //! Request InListPassive
{
  Serial.flush();


   dataTX[0] = 0x04; // Length
   lengthCheckSum(dataTX); // Length Checksum
   dataTX[2] = 0xD4;
   dataTX[3] = 0x4A; // Code
   dataTX[4] = 0x01; //MaxTarget
   dataTX[5] = 0x00; //BaudRate = 106Kbps
   dataTX[6] = 0x00; // Clear checkSum position
   checkSum(dataTX); 


   sendTX(dataTX , 7 ,23);


   for (int i = 17; i < (21) ; i++){
      _UID[i-17] = dataRX[i];
   UID[i-17] = _UID[i-17];
   }


   ATQ[0] = dataRX[13];
   ATQ[1] = dataRX[14];


   if ((dataRX[9]== 0xD5) & (dataRX[10] == 0x4B) & (dataRX[11] == 0x01)) {
      return 0;
   } else {
      return 1;
   }
}
//**********************************************************************
//!A block must be authenticated before read and write operations
uint8_t authenticate(uint8_t *UID, uint8_t blockAddress, uint8_t *keyAccess)
{
   dataTX[0] = 0x0F;
   lengthCheckSum(dataTX);
   dataTX[2] = 0xD4;
   dataTX[3] = 0x40; // inDataEchange
   dataTX[4] = 0x01; //Number of targets
   dataTX[5] = 0x60; // Authentication code
   dataTX[6] = blockAddress;
   for (int i = 0; i < 6 ; i++) {
      dataTX[i + 7] = keyAccess[i];
   }
   dataTX[13] = UID[0];  dataTX[14] = UID[1];
   dataTX[15] = UID[2];  dataTX[16] = UID[3];
   dataTX[17] = 0x00;
   checkSum(dataTX);
   sendTX(dataTX , 18 ,14);


   if ((dataRX[9]== 0xD5) & (dataRX[10] == 0x41) & (dataRX[11] == 0x00)) {
      return 0;
   } else {
      return 1;
   }
}
//**********************************************************************
//!Write 16 bytes in address .
uint8_t writeData(uint8_t address, uint8_t *blockData)  //!Writing
{
   Serial.print("                ");
   dataTX[0] = 0x15;
   lengthCheckSum(dataTX); // Length Checksum
   dataTX[2] = 0xD4;
   dataTX[3] = 0x40;//inDataEchange CODE
   dataTX[4] = 0x01;//Number of targets
   dataTX[5] = 0xA0;//Write Command
   dataTX[6] = address; //Address      


   for (int i = 0; i < 16; i++) {
      dataTX[i+7] = blockData[i];
   }


   dataTX[23] = 0x00;
   checkSum(dataTX);
   sendTX(dataTX , 24 ,14);      


   if ((dataRX[9]== 0xD5) & (dataRX[10] == 0x41) & (dataRX[11] == 0x00)) {
      return 0;
   } else {
      return 1;
   }
}
//**********************************************************************
//!Read 16 bytes from  address .
uint8_t readData(uint8_t address, uint8_t *readData) //!Reading
{
   Serial.print("                ");


   dataTX[0] = 0x05;
   lengthCheckSum(dataTX); // Length Checksum
   dataTX[2] = 0xD4; // Code
   dataTX[3] = 0x40; // Code
   dataTX[4] = 0x01; // Number of targets
   dataTX[5] = 0x30; //ReadCode
   dataTX[6] = address;  //Read address
   dataTX[7] = 0x00;
   checkSum(dataTX);
   sendTX(dataTX , 8, 30);
   memset(readData, 0x00, 16);  


   if ((dataRX[9]== 0xD5) & (dataRX[10] == 0x41) & (dataRX[11] == 0x00)) {
      for (int i = 12; i < 28; i++) {
         readData[i-12] = dataRX[i];
      }
      return 0;
   } else {
      return 1;
   }
}
//**********************************************************************
//!The PN532 sends back the version of the embedded firmware.
bool getFirmware(void)  //! It is needed to launch a simple command to sycnchronize
{
  Serial.print("                ");


   memset(dataTX, 0x00, 35);
   dataTX[0] = 0x02; // Length
   lengthCheckSum(dataTX); // Length Checksum
   dataTX[2] = 0xD4; // CODE
   dataTX[3] = 0x02; //TFI
   checkSum(dataTX); //0x2A; //Checksum   


   sendTX(dataTX , 5 , 17);
   Serial.print("\n");
   Serial.print("Your Firmware version is : ");


   for (int i = 11; i < (15) ; i++){
      Serial.print(dataRX[i], HEX);
      Serial.print(" ");
   }
   Serial.print("\n");
}


//**********************************************************************
//!Print data stored in vectors .
void print(uint8_t * _data, uint8_t length)
{
   for (int i = 0; i < length ; i++){
      Serial.print(_data[i], HEX);
      Serial.print(" ");
   }
   Serial.print("\n");
}
//**********************************************************************
//!This command is used to set internal parameters of the PN532,
bool configureSAM(void)//! Configure the SAM
{
   Serial.print("               ");


   dataTX[0] = 0x05; //Length
   lengthCheckSum(dataTX); // Length Checksum
   dataTX[2] = 0xD4;
   dataTX[3] = 0x14;
   dataTX[4] = 0x01; // Normal mode
   dataTX[5] = 0x14; // TimeOUT
   dataTX[6] = 0x00; // IRQ
   dataTX[7] = 0x00; // Clean checkSum position
   checkSum(dataTX);


   sendTX(dataTX , 8, 13);
}
//**********************************************************************
//!Send data stored in dataTX
void sendTX(uint8_t *dataTX, uint8_t length, uint8_t outLength)
{
   Serial.print(char(0x00));
   Serial.print(char(0x00));
   Serial.print(char(0xFF)); 


   for (int i = 0; i < length; i++) {
      Serial.print(char(dataTX[i]));
   }


   Serial.print(char(0x00));
   getACK();
   waitResponse();// Receive response
   getData(outLength);
}
//**********************************************************************
//!Wait for ACK response and stores it in the dataRX buffer
void getACK(void)
{
   delay(5);
   waitResponse();
   for (int i = 0; i < 5 ; i++) {
      dataRX[i] = Serial.read();
   }
}
//**********************************************************************
//!Wait the response of the module
void waitResponse(void)
{
   int val = 0xFF;
   int cont = 0x00;
   while(val != 0x00) { //Wait for 0x00 response
      val = Serial.read();
      delay(5);
      cont ++;
   }
}
//**********************************************************************
//!Get data from the module
void getData(uint8_t outLength)
{
   for (int i=5; i < outLength; i++) {
      dataRX[i] = Serial.read();//read data from the module.
   }
}
//**********************************************************************
//!Calculates the checksum and stores it in dataTX buffer
void checkSum(uint8_t *dataTX)
{
   for (int i = 0; i < dataTX[0] ; i++) {
      dataTX[dataTX[0] + 2] += dataTX[i + 2];
   }
   byte(dataTX[dataTX[0] + 2]= - dataTX[dataTX[0] + 2]);
}
//**********************************************************************
//!Calculates the length checksum and sotres it in the buffer.
uint8_t lengthCheckSum(uint8_t *dataTX)
{
   dataTX[1] = byte(0x100 - dataTX[0]);
}

Regards

Rita

Your routine that is called print() always puts a new line before it exits therefor your euro symbol will always be on a new line. remove this from the print routine and put the newline statements elsewhere if you need them

1. //********************************************************************** 
2. //!Print data stored in vectors . 
3. void print(uint8_t * _data, uint8_t length) 
4. { 
5.    for (int i = 0; i < length ; i++){ 
6.       Serial.print(_data[i], HEX); 
7.       Serial.print(" "); 
8.    } 
9.    Serial.print("\n"); 
10. } 
11. //********************************************************************** 

also where you do this

1.   Serial.println(TotalPrice,1); 
2.   Serial.write(thisByte); 

Serial.println vs Serial.print, the first one adds a new line before executing the next line so again adding a new line before you get to send the euro symbol, the second version does not so change your statement to the second version

The other stuff is because your talking to your PN532 on the same serial as the console, or atleast that is what it seems so when you do things like sendTX(...) it will show up on the console, as this is not really printable ascii it looks like gobbledygook

Provide your wireing schematic and or a link to the exact product your connecting and I can probably help further, I am assuming your using one of the ADAFRUIT boards but you dont say and are not showing any libraries so im guessing

Peter

Your routine that is called print() always puts a new line before it exits therefor your euro symbol will always be on a new line. remove this from the print routine and put the newline statements elsewhere if you need them

1. //********************************************************************** 
2. //!Print data stored in vectors . 
3. void print(uint8_t * _data, uint8_t length) 
4. { 
5.    for (int i = 0; i < length ; i++){ 
6.       Serial.print(_data[i], HEX); 
7.       Serial.print(" "); 
8.    } 
9.    Serial.print("\n"); 
10. } 
11. //********************************************************************** 

also where you do this

1.   Serial.println(TotalPrice,1); 
2.   Serial.write(thisByte); 

Serial.println vs Serial.print, the first one adds a new line before executing the next line so again adding a new line before you get to send the euro symbol, the second version does not so change your statement to the second version

The other stuff is because your talking to your PN532 on the same serial as the console, or atleast that is what it seems so when you do things like sendTX(...) it will show up on the console, as this is not really printable ascii it looks like gobbledygook

Provide your wireing schematic and or a link to the exact product your connecting and I can probably help further, I am assuming your using one of the ADAFRUIT boards but you dont say and are not showing any libraries so im guessing

Peter

Hi Peter ,

Thanks for the tip I have now the Euro sign with prices in the same row.

I have RFID 13.56 MHz / NFC Module for Arduino from Cooking Hacks https://www.cooking-hacks.com/documentation/tutorials/rfid-13-56-mhz-nfc-module-arduino-raspberry-pi-tutorial/#step3

Regards

Rita

Can you mark the appropriate answers as correct / helpful, it helps me and others who help in the community attain the badges, thanks

My assumption about the board is correct, it shares the serial (USB) between the PC console and the RFID reader and therefor you will not be able to eliminate the garbage looking text

if you look closly on their site via your provided link, they have deliberatly dimmed out all the garbage to highlite the other text but it is still there and so even they acknowledge it is an issue (Expected behaviour)

the only easy way around this would be to use an LCD display or something on the I2C but or using other GPIO pins to seperate the Human communications from the RFID communications. based on what I am seeing you do here, i dont think that would be too much of a challange for you

regards

Peter

Hello Peter ,

how can I make the answers as correct sign ?

Rita

usually it is pretty clear on the page but I just noticed this was posted as a discussion, not a question so perhaps that is why it is not showing