i used that rfid tags for that instead.
my coding to read rfid tags :
uint8_t buffer[14];
uint8_t* buffer_at;
uint8_t* buffer_end = buffer + sizeof(buffer);
String checksum;
boolean tagfound = false;
void setup()
{
Serial.begin(9600);
Serial.println(“Serial Ready”);
Serial1.begin(9600);
Serial.println("RFID Ready");
}
void loop()
{
if (Serial1.available()){
delay(20);
buffer_at = buffer;
while ( buffer_at < buffer_end )
{
*buffer_at++ = Serial1.read();
}
tagfound = true;
Serial1.end();
Serial1.begin(9600);
}
if (tagfound){
buffer_at = buffer;
uint32_t result = 0;
// Skip the preamble
++buffer_at;
// Accumulate the checksum, starting with the first value
uint8_t checksum = rfid_get_next();
// We are looking for 4 more values
int i = 4;
while(i--)
{
// Grab the next value
uint8_t value = rfid_get_next();
// Add it into the result
result <<= 8;
result |= value;
// Xor it into the checksum
checksum ^= value;
}
// Pull out the checksum from the data
uint8_t data_checksum = rfid_get_next();
// Print the result
Serial.print("Tag: ");
Serial.print(result);
if ( checksum == data_checksum )
Serial.println(" OK");
else
Serial.println(" CHECKSUM FAILED");
// We're done processing, so there is no current value
tagfound = false;
}
}
uint8_t rfid_get_next(void)
{
// sscanf needs a 2-byte space to put the result but we
// only need one byte.
uint16_t hexresult;
// Working space to assemble each byte
static char byte_chars[3];
// Pull out one byte from this position in the stream
snprintf(byte_chars,3,"%c%c",buffer_at[0],buffer_at[1]);
sscanf(byte_chars,"%x",&hexresult);
buffer_at += 2;
return static_cast<uint8_t>(hexresult);
}
So, when that tags number has detected by that antena that will be going to call that music. and if that other tags is true for another conditional that will stop that first process and call that next process.
Thanks