Arduino DHT11 I2C LCD 1602 Display
Measuring temperature with DHT11 sensor and Arduino
Purpose of this tutorial:
In this tutorial we will see how to read the temperature measured by the DTH11 sensor and display it on an LCD display.
Required components
- Arduino UNO
- sensor DTH11
- LCD display
- connecting wires
Mounting
For the DTH11 sensor, we connect:
- DATA pin of the DTH11 sensor to the digital PIN2 of arduino.
- VCC pin of the DTH11 sensor to the 3.3 V PIN of Arduino.
- GND pin of the DTH11 sensor to the GND of Arduino.
For the LCD display we connect:
-
the SDA pin at the Arduino analog pin A4.
-
the SCL pin at the Arduino analog pin A5.
-
the VCC pin at the Arduino 5v pin.
-
the GND pin at the Arduino GND pin
Program
Here is the program that reads the temperature measured by the DTH11 sensor and displays it on an LCD display.
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#include <dht11.h> #include <LiquidCrystal_I2C.h> #define DHT11PIN 2 // broche DATA -> PIN 2 LiquidCrystal_I2C lcd(0x27, 20, 4); dht11 DHT11; void setup() { lcd.init(); } void loop() { DHT11.read(DHT11PIN); lcd.backlight(); lcd.clear(); lcd.setCursor(0, 0); lcd.print("temperature= "); lcd.setCursor(0,1); lcd.print((float)DHT11.temperature); delay(2000); } |
Note: you must import the two libraries DTH11 and I2c_LCD1602
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