#include <dht.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

/*-------------------DHT22-------------------------*/
#define dataDHT 8
dht DHT1;

/*-------------------SSD1306-------------------------*/
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64 

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C
Adafruit_SSD1306 screen(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
/*-------------------SSD1306-------------------------*/
  if(!screen.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  // Clear the buffer.
  screen.clearDisplay();

  // Display Text
  screen.setTextSize(1);
  screen.setTextColor(WHITE);
  screen.setCursor(0,0);
  screen.println("Temperature:");
  screen.setCursor(0,20);
  screen.println("Humidity:");
  screen.display();
}

void loop() {
  // put your main code here, to run repeatedly:
  int readData = DHT1.read22(dataDHT);
  float t = DHT1.temperature;
  float h = DHT1.humidity;

  Serial.print("Temperature:");
  Serial.print(t); Serial.println("°C");
  Serial.print("Humidity:");
  Serial.print(h); Serial.println("%");

  screen.fillRect(80, 0, 48, 16, BLACK);  // 清除上次温度显示的位置
  screen.fillRect(80, 20, 48, 16, BLACK); // 清除上次湿度显示的位置

  screen.setCursor(80, 0);   // 温度数值位置
  screen.print(t);
  screen.print(" C");

  screen.setCursor(80, 20);  // 湿度数值位置
  screen.print(h);
  screen.print(" %");

  screen.display();  // 更新显示

  delay(2000);  // 每2秒更新一次
  
}