DS18b20 temp measurement

• USB onewire dongle DS9490R - w1 driver included in linux.

• http://www.shucksmith.co.uk/blog/ds2480bds18b20drivers-1

• Add libraries to /usr/share/arduino/libraries/

  • sudo mv OneWire /usr/share/arduino/libraries/
• DUD

#include <OneWire.h>
#include <DallasTemperature.h>
 
// Data wire is plugged into pin 2 on the Arduino
#define ONE_WIRE_BUS 2
 
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
 
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
 
void setup(void)
{
// start serial port
Serial.begin(9600);
delay(5000);
Serial.println("Dallas Temperature IC Control Library Demo");
 
// Start up the library
sensors.begin(); // IC Default 9 bit. If you have troubles consider upping it 12. Ups the delay giving the IC more time to process the temperature measurement
}
 
 
void loop(void)
{
// call sensors.requestTemperatures() to issue a global temperature
// request to all devices on the bus
Serial.print("Requesting temperatures...");
sensors.requestTemperatures(); // Send the command to get temperatures
Serial.println("DONE");
 
Serial.print("Temperature for Device 1 is: ");
Serial.print(sensors.getTempCByIndex(0)); // Why "byIndex"? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
 
}

CategoryElectronics