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= DS18b20 temp measurement =
 * Links [[esp8266]] , [[linux/Pi3]]
 * USB onewire dongle DS9490R - w1 driver included in linux.
 * http://contractorwolf.com/sparkcore-temp-ds18b20/

 * 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
 
}
}}}
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CategoryElectronics