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Arduino Project 024 - LCD Temperature Display

RonWang8个月前 (11-11)电子编程361

This project is a simple demonstration of using an LCD to present useful information to the user—in this case, the temperature from an DTH11 humidity and temperature sensor. 

Project 24 Liquid Crystal Temperature Displays 

Ardunio DHT11 Temperature Humidity Display Schematic

Ardunio DHT11 Temperature Humidity Display Circuit

/* Coding Ron Wang
   Nov.11th 2024
   Autaba support for coding hardware
   Project 24  LCD Temperature Display
 */
// Adding LCD and DHT libraries

#include <LiquidCrystal.h>
#include  <SimpleDHT.h>

//Declaring digital pin no 6 as the dht11 data pin

int  pinDHT11 = 11;
SimpleDHT11 dht11;

//Declaring the lcd pins

const  int rs = 9, en = 8, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en,  d4, d5, d6, d7);
void setup() {

 Serial.begin(9600); // Choose 9600 at the  port screen
 lcd.begin(16, 2);  //Telling our LCD to start up
     
}
void loop() {
  /*These  serial codes are for getting readings on the port screen as well as 
    the LCD display, since they'll offer us a more detailed interface
  */
  
  Serial.println("=================================");
  Serial.println("DHT11 readings...");
  
 
  byte temperature = 0;
  byte humidity = 0;
  int err = SimpleDHTErrSuccess;
  
  //This bit will tell our Arduino what to do if there is some sort of an error at getting readings  from our sensor
  
  if ((err = dht11.read(pinDHT11, &temperature, &humidity, NULL))  != SimpleDHTErrSuccess) {
    Serial.print("No reading , err="); Serial.println(err);delay(1000);
    return;
  }
  
  Serial.print("Readings: ");
  Serial.print((int)temperature);  Serial.print(" Celcius, ");
  Serial.print((int)humidity); Serial.println("  %");
 
  //Telling our lcd to refresh itself every 0.75 seconds
  lcd.clear();
  
  //Choosing the first line and row
  lcd.setCursor(0,0);
  //Typing Temp:  to the first line starting from the first row
  lcd.print("Temp: ");
  //Typing  the temperature readings after "Temp: " 
  lcd.print((int)temperature);
  //Choosing the second line and first row
  lcd.setCursor(0,1);
  //Typing  Humidity(%): to the second line starting from the first row
  lcd.print("Humidity(%):  ");
  //Typing the humidity readings after "Humidity(%): "
  lcd.print((int)humidity);
 
  delay(750);
}

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标签: Arduino

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