85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
// DHT Temperature & Humidity Sensor
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// Unified Sensor Library Example
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// Written by Tony DiCola for Adafruit Industries
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// Released under an MIT license.
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// Depends on the following Arduino libraries:
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// - Adafruit Unified Sensor Library: https://github.com/adafruit/Adafruit_Sensor
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// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
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#include <Adafruit_Sensor.h>
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#include <DHT.h>
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#include <DHT_U.h>
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#define DHTPIN 2 // Pin which is connected to the DHT sensor.
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// Uncomment the type of sensor in use:
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//#define DHTTYPE DHT11 // DHT 11
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#define DHTTYPE DHT22 // DHT 22 (AM2302)
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//#define DHTTYPE DHT21 // DHT 21 (AM2301)
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// See guide for details on sensor wiring and usage:
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// https://learn.adafruit.com/dht/overview
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DHT_Unified dht(DHTPIN, DHTTYPE);
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uint32_t delayMS;
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void setup() {
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Serial.begin(9600);
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// Initialize device.
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dht.begin();
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Serial.println("DHTxx Unified Sensor Example");
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// Print temperature sensor details.
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sensor_t sensor;
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dht.temperature().getSensor(&sensor);
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Serial.println("------------------------------------");
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Serial.println("Temperature");
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Serial.print ("Sensor: "); Serial.println(sensor.name);
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Serial.print ("Driver Ver: "); Serial.println(sensor.version);
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Serial.print ("Unique ID: "); Serial.println(sensor.sensor_id);
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Serial.print ("Max Value: "); Serial.print(sensor.max_value); Serial.println(" *C");
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Serial.print ("Min Value: "); Serial.print(sensor.min_value); Serial.println(" *C");
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Serial.print ("Resolution: "); Serial.print(sensor.resolution); Serial.println(" *C");
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Serial.println("------------------------------------");
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// Print humidity sensor details.
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dht.humidity().getSensor(&sensor);
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Serial.println("------------------------------------");
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Serial.println("Humidity");
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Serial.print ("Sensor: "); Serial.println(sensor.name);
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Serial.print ("Driver Ver: "); Serial.println(sensor.version);
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Serial.print ("Unique ID: "); Serial.println(sensor.sensor_id);
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Serial.print ("Max Value: "); Serial.print(sensor.max_value); Serial.println("%");
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Serial.print ("Min Value: "); Serial.print(sensor.min_value); Serial.println("%");
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Serial.print ("Resolution: "); Serial.print(sensor.resolution); Serial.println("%");
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Serial.println("------------------------------------");
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// Set delay between sensor readings based on sensor details.
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delayMS = sensor.min_delay / 1000;
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}
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void loop() {
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// Delay between measurements.
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delay(delayMS);
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// Get temperature event and print its value.
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sensors_event_t event;
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dht.temperature().getEvent(&event);
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if (isnan(event.temperature)) {
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Serial.println("Error reading temperature!");
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}
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else {
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Serial.print("Temperature: ");
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Serial.print(event.temperature);
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Serial.println(" *C");
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}
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// Get humidity event and print its value.
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dht.humidity().getEvent(&event);
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if (isnan(event.relative_humidity)) {
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Serial.println("Error reading humidity!");
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}
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else {
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Serial.print("Humidity: ");
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Serial.print(event.relative_humidity);
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Serial.println("%");
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}
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}
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