Hi there,
I am trying to read out the serial number from the ds2401 using my arduino UNO. Only i'm not getting any results. I tried searching for answers on the internet but found nothing. I tried the following code i found online.
#include <OneWire.h>
OneWire ds(6); // OneWire bus on digital pin 6
void setup()
{
Serial.begin (9600);
delay(250);
}
void loop()
{
byte i; // This is for the for loops
boolean present; // device present varj
byte data[8]; // container for the data from device
byte crc_calc; //calculated CRC
byte crc_byte; //actual CRC as sent by DS2401
//1-Wire bus reset, needed to start operation on the bus,
//returns a 1/TRUE if presence pulse detected
present = ds.reset();
if (present == TRUE)
{
Serial.println("---------- Device present ----------");
ds.write(0x33); //Send Read data command
data[0] = ds.read();
Serial.print("Family code: 0x");
PrintTwoDigitHex (data[0], 1);
Serial.print("Hex ROM data: ");
for (i = 1; i <= 6; i++)
{
data[i] = ds.read(); //store each byte in different position in array
PrintTwoDigitHex (data[i], 0);
Serial.print(" ");
}
Serial.println();
crc_byte = ds.read(); //read CRC, this is the last byte
crc_calc = OneWire::crc8(data, 7); //calculate CRC of the data
Serial.print("Calculated CRC: 0x");
PrintTwoDigitHex (crc_calc, 1);
Serial.print("Actual CRC: 0x");
PrintTwoDigitHex (crc_byte, 1);
}
else //Nothing is connected in the bus
{
Serial.println("xxxxx Nothing connected xxxxx");
}
delay(3000);
}
void PrintTwoDigitHex (byte b, boolean newline)
{
Serial.print(b/16, HEX);
Serial.print(b%16, HEX);
if (newline) Serial.println();
}
I connected the ds2401 to my arduino uno this way:
Picture how i connected it. (for some reason the img tags dont work with this type of url)
I hope someone can help me figure this out. 
Regards,
