arduino使用oled显示时间MQ_2温湿度

double Fahrenheit(double celsius)
{
return 1.8 * celsius + 32;
}    //摄氏温度度转化为华氏温度

double Kelvin(double celsius)
{
return celsius + 273.15;
}     //摄氏温度转化为开氏温度

// 露点（点在此温度时，空气饱和并产生露珠）
// 参考: http://wahiduddin.net/calc/density_algorithms.htm double dewPoint(double celsius, double humidity)
{
double A0= 373.15/(273.15 + celsius);
double SUM = -7.90298 * (A0-1);
SUM += 5.02808 * log10(A0);
SUM += -1.3816e-7 * (pow(10, (11.344*(1-1/A0)))-1) ;
SUM += 8.1328e-3 * (pow(10,(-3.49149*(A0-1)))-1) ;
SUM += log10(1013.246);
double VP = pow(10, SUM-3) * humidity;
double T = log(VP/0.61078);   // temp var
return (241.88 * T) / (17.558-T);
}

// 快速计算露点，速度是5倍dewPoint()
// 参考: http://en.wikipedia.org/wiki/Dew_point double dewPointFast(double celsius, double humidity)
{
double a = 17.271;
double b = 237.7;
double temp = (a * celsius) / (b + celsius) + log(humidity/100);
double Td = (b * temp) / (a - temp);
return Td;
}
static const unsigned char PROGMEM str_1[] =
{
0x00,0x08,0x43,0xFC,0x32,0x08,0x12,0x08,
0x83,0xF8,0x62,0x08,0x22,0x08,0x0B,0xF8,
0x10,0x00,0x27,0xFC,0xE4,0xA4,0x24,0xA4,
0x24,0xA4,0x24,0xA4,0x2F,0xFE,0x20,0x00,
};//温

static const unsigned char PROGMEM str_2[] =
{
0x01,0x00,0x00,0x84,0x3F,0xFE,0x22,0x20,
0x22,0x28,0x3F,0xFC,0x22,0x20,0x23,0xE0,
0x20,0x00,0x2F,0xF0,0x22,0x20,0x21,0x40,
0x20,0x80,0x43,0x60,0x8C,0x1E,0x30,0x04,
};  // 度

static const unsigned char PROGMEM str_3[] =
{
0x00,0x08,0x47,0xFC,0x34,0x08,0x14,0x08,
0x87,0xF8,0x64,0x08,0x24,0x08,0x0F,0xF8,
0x11,0x20,0x21,0x20,0xE9,0x24,0x25,0x28,
0x23,0x30,0x21,0x24,0x3F,0xFE,0x20,0x00,
}; //湿
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <dht11.h>
#include <DS3231.h>
#include <LiquidCrystal_I2C.h>
#include <RTClib.h>

dht11 DHT11;
#define DHT11PIN 2
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

#define LOGO16_GLCD_HEIGHT 16 //定义显示高度
#define LOGO16_GLCD_WIDTH  16 //定义显示宽度

#if (SSD1306_LCDHEIGHT != 64)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
void printDateTime(DateTime dateTime);
//创建实例
RTC_DS1307 RTC;

DS3231 Clock;
bool Century=false;
bool h12;
bool PM;
uint8_t bell[8] = {0x4,0xe,0xe,0xe,0x1f,0x0,0x4};
char data[15];
char Str_year[3], Str_month[3], Str_date[3], Str_DoW[3], Str_hour[3], Str_minute[3], Str_second[3];
String recivedStr="";//接收到的字符串
int recivedNum =0;//接收到的字符个数
void setup()   {
Serial.begin(9600);
Wire.begin();
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3D (for the 128x64)  //OLED 的I2C位置
// init done

display.clearDisplay();
////////////////

// Serial.println("Please enter the time: year[2]month[2]date[2]DoW[2]hour[2]minute[2]second[2]");
// Serial.println("example: 2014-12-3 Wednesday 14:15:15 enter:14120303141515");//1703072154
//英文字符显示
//display.setTextSize(1);             //设置字体大小
//display.setTextColor(WHITE);        //设置字体颜色白色
//display.setCursor(0,0);             //设置字体的起始位置
//display.println("   zhongbest.com");//输出字符并换行
//display.display();                  //把缓存的都显示
//初始化实时时钟
RTC.begin();
}

void loop() {
int chk = DHT11.read(DHT11PIN);

// Serial.print("Read sensor: ");
//  switch (chk)
//  {
//    case DHTLIB_OK:
//                Serial.println("OK");
//                break;
//    case DHTLIB_ERROR_CHECKSUM:
//                Serial.println("Checksum error");
//                break;
//    case DHTLIB_ERROR_TIMEOUT:
//                Serial.println("Time out error");
//                break;
//    default:
//                Serial.println("Unknown error");
//                break;
//  }
display.clearDisplay();
//英文字符显示
display.setTextSize(1);             //设置字体大小
display.setTextColor(WHITE);        //设置字体颜色白色
display.setCursor(0,0);             //设置字体的起始位置

// display.print("Humidity(%):");
// display.println((float)DHT11.humidity, 2);

// display.print("Temperature(oC):");

//  display.print("Temperature(oF):");
//  display.println(Fahrenheit(DHT11.temperature), 2);
//
//  display.print("Temperature(K):");
//  display.println(Kelvin(DHT11.temperature), 2);
//
//  display.print("Dew Point(oC):");
//  display.println(dewPoint(DHT11.temperature, DHT11.humidity));
//
//  display.print("Dew PointFast(oC):");
//  display.println(dewPointFast(DHT11.temperature, DHT11.humidity));
//中文字符显示
display.drawBitmap(0, 5, str_1, 16, 16, 1); //在坐标X:26  Y:16的位置显示中文字符中
display.drawBitmap(18, 5, str_2, 16, 16, 1); //在坐标X:42  Y:16的位置显示中文字符贝
display.setCursor(36,11);             //设置字体的起始位置
display.setTextSize(1);             //设置字体大小
display.print(":");
display.println((float)DHT11.temperature, 2);
display.drawBitmap(0, 25, str_3, 16, 16, 1); //在坐标X:26  Y:16的位置显示中文字符中
display.drawBitmap(18, 25, str_2, 16, 16, 1); //在坐标X:42  Y:16的位置显示中文字符贝
display.setCursor(36,30);             //设置字体的起始位置
display.setTextSize(1);             //设置字体大小
display.print(":");
display.println((float)DHT11.humidity, 2);
int val;
val=analogRead(0);
// Serial.println(val,DEC);
display.setCursor(0,55);             //设置字体的起始位置
display.print("MQ-2: ");
display.println(val,DEC);
// display.setCursor(0,60);
display.print("-------------------");
DateTime now = RTC.now();
//通过串口传送当前的日期和时间
printDateTime(now);

///////////////////////////////////////////////////////////

while(Serial.available() > 0)//读取字符串
{
recivedStr += char(Serial.read());
//      delay(2);
recivedNum = recivedNum+1;
}
if(recivedNum == 12)
{  //year[2]month[2]date[2]DoW[2]hour[2]minute[2]second[2]
String strtemp = "";
strtemp = recivedStr.substring(0,2);
int years = strtemp.toInt();
RTC.set(RTC_YEAR,years);//设置年

strtemp = recivedStr.substring(2,4);
int months = strtemp.toInt();
RTC.set(RTC_MONTH,months);//设置月

strtemp = recivedStr.substring(4,6);
int days = strtemp.toInt();
RTC.set(RTC_DAY,days);//设置日

strtemp = recivedStr.substring(6,8);
int hours = strtemp.toInt();
RTC.set(RTC_HOUR,hours);//设置小时

strtemp = recivedStr.substring(8,10);
int minutes = strtemp.toInt();
RTC.set(RTC_MINUTE,minutes);//设置分钟

strtemp = recivedStr.substring(10,12);
int seconds = strtemp.toInt();
RTC.set(RTC_SECOND,seconds);//设置秒
recivedNum = 0;
}
display.display();                  //把缓存的都显示
delay(1000);
}

void printDateTime(DateTime dateTime) {
//传送年份
display.setCursor(0,45);             //设置字体的起始位置
display.print(dateTime.year(), DEC);
display.print('/');
//传送月份
display.print(dateTime.month(), DEC);
display.print('/');
//传送月份中的第几天
display.print(dateTime.day(), DEC);
display.print(' ');
//传送小时
display.print(dateTime.hour(), DEC);
display.print(':');
//传送分钟
display.print(dateTime.minute(), DEC);
display.print(':');
//传送秒
display.print(dateTime.second(), DEC);
display.display();                  //把缓存的都显示
}

烟雾传感器MQ-2:

温湿度传感器DHT11:

时钟模块DS1307: