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- // DHT Temperature & Humidity Sensor
- // Unified Sensor Library Example
- // Written by Tony DiCola for Adafruit Industries
- // Released under an MIT license.
- // REQUIRES the following Arduino libraries:
- // - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
- // - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor
- #include <Adafruit_Sensor.h>
- #include <DHT.h>
- #include <DHT_U.h>
- #define DHTPIN 2 // Digital pin connected to the DHT sensor
- // Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
- // Pin 15 can work but DHT must be disconnected during program upload.
- // Uncomment the type of sensor in use:
- //#define DHTTYPE DHT11 // DHT 11
- #define DHTTYPE DHT22 // DHT 22 (AM2302)
- //#define DHTTYPE DHT21 // DHT 21 (AM2301)
- // See guide for details on sensor wiring and usage:
- // https://learn.adafruit.com/dht/overview
- DHT_Unified dht(DHTPIN, DHTTYPE);
- uint32_t delayMS;
- void setup() {
- Serial.begin(9600);
- // Initialize device.
- dht.begin();
- Serial.println(F("DHTxx Unified Sensor Example"));
- // Print temperature sensor details.
- sensor_t sensor;
- dht.temperature().getSensor(&sensor);
- Serial.println(F("------------------------------------"));
- Serial.println(F("Temperature Sensor"));
- Serial.print (F("Sensor Type: ")); Serial.println(sensor.name);
- Serial.print (F("Driver Ver: ")); Serial.println(sensor.version);
- Serial.print (F("Unique ID: ")); Serial.println(sensor.sensor_id);
- Serial.print (F("Max Value: ")); Serial.print(sensor.max_value); Serial.println(F("°C"));
- Serial.print (F("Min Value: ")); Serial.print(sensor.min_value); Serial.println(F("°C"));
- Serial.print (F("Resolution: ")); Serial.print(sensor.resolution); Serial.println(F("°C"));
- Serial.println(F("------------------------------------"));
- // Print humidity sensor details.
- dht.humidity().getSensor(&sensor);
- Serial.println(F("Humidity Sensor"));
- Serial.print (F("Sensor Type: ")); Serial.println(sensor.name);
- Serial.print (F("Driver Ver: ")); Serial.println(sensor.version);
- Serial.print (F("Unique ID: ")); Serial.println(sensor.sensor_id);
- Serial.print (F("Max Value: ")); Serial.print(sensor.max_value); Serial.println(F("%"));
- Serial.print (F("Min Value: ")); Serial.print(sensor.min_value); Serial.println(F("%"));
- Serial.print (F("Resolution: ")); Serial.print(sensor.resolution); Serial.println(F("%"));
- Serial.println(F("------------------------------------"));
- // Set delay between sensor readings based on sensor details.
- delayMS = sensor.min_delay / 1000;
- }
- void loop() {
- // Delay between measurements.
- delay(delayMS);
- // Get temperature event and print its value.
- sensors_event_t event;
- dht.temperature().getEvent(&event);
- if (isnan(event.temperature)) {
- Serial.println(F("Error reading temperature!"));
- }
- else {
- Serial.print(F("Temperature: "));
- Serial.print(event.temperature);
- Serial.println(F("°C"));
- }
- // Get humidity event and print its value.
- dht.humidity().getEvent(&event);
- if (isnan(event.relative_humidity)) {
- Serial.println(F("Error reading humidity!"));
- }
- else {
- Serial.print(F("Humidity: "));
- Serial.print(event.relative_humidity);
- Serial.println(F("%"));
- }
- }
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