This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
In this project I want to combine 2 components, the 1602 LCD Display
and the DHT11 temperature and humidity sensor
to create a digital thermometer we could actually use in the real world.
Before we start, read the DHT11 tutorial where we write a program that reads the data from the sensor:
and also read the 1602 LCD tutorial where I explain how to write to the display:
Once you do so, all you need to do from the circuits perspective is to add both circuits to the same Arduino based project:
Here it is in practice:
On the code side, we do a similar thing. We include both the DHT and the LiquidCrystal libraries first, then we initialize the 2 components.
We initialize them in setup() and in loop() we check every 2 seconds the data coming from the sensor, and we print it to the LCD display:
#include <LiquidCrystal.h>
#include <DHT.h>
DHT dht(2, DHT11);
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
void setup() {
dht.begin();
lcd.begin(16, 2);
}
void loop() {
delay(2000);
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
return;
}
lcd.setCursor(0, 0);
lcd.print((String)"Temp: " + t + "C");
lcd.setCursor(0, 1);
lcd.print((String)"Humidity: " + h + "%");
}Here is the project running:
This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
flaviocopes.com | Sciencx (2021-03-28T05:00:00+00:00) Arduino project: build a digital thermometer. Retrieved from https://www.scien.cx/2021/03/28/arduino-project-build-a-digital-thermometer/
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