Hi Mike
Here's what you need :
pin 1 goes to Ground
pin 2 goes to input pin and to 4k7. Other side of 4k7 goes to 5v
pin 3 goes to 5v
(edited to show correct pins)
see attached drawing.
Next, you need to get the sensors unique address.
To do this, upload and run the following, which will detect the address and display it in the Serial Monitor :
// This sketch looks for 1-wire devices and
// prints their addresses (serial number) to
// the UART, in a format that is useful in Arduino sketches
// Tutorial:
// http://www.hacktronics.com/Tutorials/arduino-1-wire-address-finder.html
#include <OneWire.h>
OneWire ds(3); // Connect your 1-wire device to pin 3
void setup(void) {
Serial.begin(9600);
discoverOneWireDevices();
}
void discoverOneWireDevices(void) {
byte i;
byte present = 0;
byte data[12];
byte addr[8];
Serial.print("Looking for 1-Wire devices...\n\r");
while(ds.search(addr)) {
Serial.print("\n\rFound \'1-Wire\' device with address:\n\r");
for( i = 0; i < 8; i++) {
Serial.print("0x");
if (addr[i] < 16) {
Serial.print('0');
}
Serial.print(addr[i], HEX);
if (i < 7) {
Serial.print(", ");
}
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.print("CRC is not valid!\n");
return;
}
}
Serial.print("\n\r\n\rThat's it.\r\n");
ds.reset_search();
return;
}
void loop(void) {
// nothing to see here
}
After you get the unique address, copy it from the serial monitor and place it into the following code :
// This Arduino sketch reads DS18B20 "1-Wire" digital
// temperature sensors.
// Tutorial:
// http://www.hacktronics.com/Tutorials/arduino-1-wire-tutorial.html
#include <OneWire.h>
#include <DallasTemperature.h>
// Data wire is plugged into pin 3 on the Arduino
#define ONE_WIRE_BUS 3
// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
// Assign the addresses of your 1-Wire temp sensors.
// See the tutorial on how to obtain these addresses:
// http://www.hacktronics.com/Tutorials/arduino-1-wire-address-finder.html
//add the unique address to the following line
DeviceAddress insideThermometer = { 0x28, 0xCC, 0xD1, 0xE1, 0x02, 0x00, 0x00, 0xE6 };
//use the next code if you add additional sensors
//DeviceAddress outsideThermometer = { 0x28, 0x6B, 0xDF, 0xDF, 0x02, 0x00, 0x00, 0xC0 };
//DeviceAddress dogHouseThermometer = { 0x28, 0x59, 0xBE, 0xDF, 0x02, 0x00, 0x00, 0x9F };
void setup(void)
{
// start serial port
Serial.begin(9600);
// Start up the library
sensors.begin();
// set the resolution to 10 bit (good enough?)
sensors.setResolution(insideThermometer, 11);
// sensors.setResolution(outsideThermometer, 10);
// sensors.setResolution(dogHouseThermometer, 10);
}
void printTemperature(DeviceAddress deviceAddress)
{
float tempC = sensors.getTempC(deviceAddress);
if (tempC == -127.00) {
Serial.print("Error getting temperature");
} else {
Serial.print("C: ");
Serial.print(tempC);
Serial.print(" F: ");
Serial.print(DallasTemperature::toFahrenheit(tempC));
}
}
void loop(void)
{
delay(2000);
Serial.print("Getting temperatures...\n\r");
sensors.requestTemperatures();
Serial.print("Inside temperature is: ");
printTemperature(insideThermometer);
Serial.print("\n\r");
// Serial.print("Outside temperature is: ");
// printTemperature(outsideThermometer);
// Serial.print("\n\r");
// Serial.print("Dog House temperature is: ");
// printTemperature(dogHouseThermometer);
// Serial.print("\n\r\n\r");
}
). Thanks again!