Day3 01-dht11

• dht11에서 정보를 받아와 OLED에 출력하는 코드

// Humid : 습도값

// Temp  : 온도

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128  // OLED display width, in pixels

#define SCREEN_HEIGHT 64  // OLED display height, in pixels

#define OLED_RESET -1        // Reset pin # (or -1 if sharing Arduino reset pin)

#define SCREEN_ADDRESS 0x3C  ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32

Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

int32_t count = 10;

#include "DHT.h"

#define DHTPIN 2     // Digital pin connected to the DHT sensor

#define DHTTYPE DHT11   // DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {

  Serial.begin(9600);

  // put your setup code here, to run once:

  oled.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);

  delay(2000);

  oled.clearDisplay();

  oled.setTextSize(1);

  oled.setTextColor(WHITE);

  dht.begin();

}

void loop() {

  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!

  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)

  float h = dht.readHumidity();

  // Read temperature as Celsius (the default)

  float t = dht.readTemperature();

  Serial.print(F("Humidity: "));

  Serial.print(h);

  Serial.print(F("%  Temperature: "));

  Serial.print(t);

  Serial.println(F("°C "));

  // put your main code here, to run repeatedly:

  oled.clearDisplay();

  oled.setTextSize(1);

  oled.setCursor(15, 5);

  oled.println("<< Smart House >> ");

  oled.setTextSize(1);

  oled.setCursor(15, 25);

  oled.println("Humid : " + String(h) + " %");

  oled.setCursor(15, 35);

  oled.println("Temp  : " + String(t) + String(" C "));

  oled.display();

}

// int32_t count = 10;