标题: 基于arduino的温湿度采集及oled显示屏实时显示实验 [打印本页]

---

作者: 15034148562    时间: 2020-2-28 11:55
标题: 基于arduino的温湿度采集及oled显示屏实时显示实验
最近用arduino做了一个小实验，通过温度和湿度传感器采集当前室内温度和湿度，并在温度和湿度超标的时候发出报警，同时将温湿度数据实时oled显示，也可以通过串口观测数据，话不多说，代码如下：  

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <dht.h>
dht DHT;
#include <MsTimer2.h>  
#include <SPI.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#define ONE_WIRE_BUS 7
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
#define uint8  unsigned char
#define uint16 unsigned int
#define OLED_RESET 8
Adafruit_SSD1306 display(OLED_RESET);
#define uint8  unsigned char
#define uint16 unsigned int
#include <MsTimer2.h>  
#define OLED_RESET 8
const int DHT11_PIN= 8;//Humiture sensor attach to pin7
int buzzerPin = 6;

int incomingByte = 0;                    // 接收到的 data byte
String inputString = "";                 // 用来储存接收到的内容
boolean newLineReceived = false;         // 前一次数据结束标志
boolean startBit  = false;               //协议开始标志

String returntemp = "";           //存储返回值
char temp[100] = {0};

void setup() {
  // put your setup code here, to run once:
    Serial.begin(9600);
    sensors.begin(); // initialize the bus
    display.begin(SSD1306_SWITCHCAPVCC, 0x3c);  // initialize with the I2C addr 0x3D (for the 128x64)
    display.clearDisplay();
    pinMode(buzzerPin,OUTPUT);//set the buzzer as as OUTPUT
   // digitalWrite(buzzerPin,LOW);//initialize the buzzerPin as LOW level
    digitalWrite(buzzerPin,HIGH);
}

void loop() {
   while(1){
    display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(0,0);
    display.println("deg:");
    display.setCursor(110,0);
    display.println("C");
    display.setCursor(0,30);
    display.println("wet:");
    display.display();
   gettempture();
   dht();
   display.setTextSize(2);
    display.setTextColor(WHITE);
    display.setCursor(0,0);
    display.println("deg:");
    display.setCursor(110,0);
    display.println("C");
    display.setCursor(0,30);
    display.println("wet:");
    display.display();
    //int chk = DHT11.read(8);           //读取温湿度传感器管脚的数值
    //int fTemp = (float)DHT11.temperature;        //fTemp赋值为浮点型读取到的温度值
    //int  iHumidity = DHT11.humidity;           //iHumidity赋值为读取到的湿度值
    memset(temp, 0x00, sizeof(temp));        //清空temp数组
    dtostrf(gettempture(), 3, 1, temp);  // 相當於 %3.2f
    String sTemp = temp;         //数组temp中的字符串赋给sTemp
    String sHum =  "";   
    sHum += dht();
    returntemp = "$TH-T" + sTemp + "-H" + sHum + "#";
    Serial.print(returntemp); //返回协议数据包      
    inputString = "";   // clear the string
   // delay(3000);
   }
}
float gettempture(void) {
   float temp1=0;
   float realtemp=0;
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(50,0);
  for(int a=0;a<2;a++){
    sensors.requestTemperatures();
    temp1=sensors.getTempCByIndex(0);
    realtemp+=temp1;

  }
    realtemp=realtemp/2;
    display.println(realtemp);
    display.display();

if(realtemp>30)
{
digitalWrite(buzzerPin,LOW);
}
else
{
digitalWrite(buzzerPin,HIGH);
}
return realtemp;

}
float dht(void)
{
  D: int chk = DHT.read11(DHT11_PIN);//read the value returned from sensor
  switch (chk)
  {
  case DHTLIB_OK:  
    //Serial.println("OK!");
    break;
  case DHTLIB_ERROR_CHECKSUM:
    //goto D;
    //Serial.print("Checksum error,\t");
    break;
  case DHTLIB_ERROR_TIMEOUT:
      goto D;
    //Serial.print("Time out error,\t");
    break;
  default:
     // goto D;
    //Serial.print("Unknown error,\t");
    break;
  }
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(50,30);
  display.println(DHT.humidity,1);
  display.display();

  if(DHT.humidity>50)
{
digitalWrite(buzzerPin,LOW);
}
else
{
digitalWrite(buzzerPin,HIGH);
}
return DHT.humidity;
}

---

欢迎光临 (http://www.51hei.com/bbs/)

Powered by Discuz! X3.1