Hello everyone!
I have some problems with parts i mentioned above. They just can't work both. DHT11 is working fine on serial monitor, and 16x2 LCD is showing "Hello World" as it should, but when I use them both, LCD is not working, it's without background light and shows strange letters or nothing. I need them to my project with thermometer. Only pins shared are 5V and GND.
Here is the program I'm using
Greetings from Poland!
#include "DHT.h"
#define DHTPIN 2 // what pin we're connected to
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
// #define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
DHT dht(DHTPIN, DHTTYPE);
// LCD
// LCD RS=3, EN=4, DS4=5, DS5=6, DS6=7, DS7=8
#include <Wire.h> // standardowa biblioteka Arduino
#include <LiquidCrystal_I2C.h> // dolaczenie pobranej biblioteki I2C dla LCD
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
void setup() {
Serial.begin(9600);
// set up the LCD's number of columns and rows:
lcd.begin(16,2);
dht.begin();
lcd.backlight();
}
void loop() {
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
int h = dht.readHumidity();
int t = dht.readTemperature();
// set the cursor to (0,0):
lcd.setCursor(0, 0);
// print from 0 to 9:
lcd.print("Temp: ");
lcd.print(t);
lcd.print("C");
// set the cursor to (16,1):
lcd.setCursor(0,1);
lcd.print("Humidity: ");
lcd.print(h);
lcd.print("%");
delay(200);
}