67 lines
1.9 KiB
Plaintext
67 lines
1.9 KiB
Plaintext
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#include <OneWire.h>
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#include <DallasTemperature.h>
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// Data wire is plugged into port 2 on the Arduino
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#define ONE_WIRE_BUS 2
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// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
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OneWire oneWire(ONE_WIRE_BUS);
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// Pass our oneWire reference to Dallas Temperature.
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DallasTemperature sensors(&oneWire);
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void setup(void)
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{
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// start serial port
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Serial.begin(115200);
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Serial.println("Dallas Temperature Control Library - Async Demo");
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Serial.println("\nDemo shows the difference in length of the call\n\n");
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// Start up the library
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sensors.begin();
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}
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void loop(void)
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{
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// Request temperature conversion (traditional)
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Serial.println("Before blocking requestForConversion");
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unsigned long start = millis();
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sensors.requestTemperatures();
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unsigned long stop = millis();
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Serial.println("After blocking requestForConversion");
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Serial.print("Time used: ");
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Serial.println(stop - start);
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// get temperature
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Serial.print("Temperature: ");
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Serial.println(sensors.getTempCByIndex(0));
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Serial.println("\n");
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// Request temperature conversion - non-blocking / async
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Serial.println("Before NON-blocking/async requestForConversion");
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start = millis();
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sensors.setWaitForConversion(false); // makes it async
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sensors.requestTemperatures();
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sensors.setWaitForConversion(true);
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stop = millis();
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Serial.println("After NON-blocking/async requestForConversion");
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Serial.print("Time used: ");
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Serial.println(stop - start);
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// 9 bit resolution by default
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// Note the programmer is responsible for the right delay
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// we could do something usefull here instead of the delay
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int resolution = 9;
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delay(750/ (1 << (12-resolution)));
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// get temperature
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Serial.print("Temperature: ");
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Serial.println(sensors.getTempCByIndex(0));
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Serial.println("\n\n\n\n");
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delay(5000);
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}
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