nodeMCU DH11 and display

nodeMCU_DH11.cpp

#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#include <DHT.h>
#include <DHT_U.h>

int D0 = 16;
int D1 = 5;
int D2 = 4;
int D3 = 0;
int D4 = 2;
int D5 = 14;
int D6 = 12;
int D7 = 13;
int D8 = 15;
int RX = 3;

LiquidCrystal_I2C lcd(0x27,16,2);  

#define DHTPIN            D0         // Pin which is connected to the DHT sensor.
#define DHTTYPE           DHT11     // DHT 11 
//#define DHTTYPE           DHT22     // DHT 22 (AM2302)
//#define DHTTYPE           DHT21     // DHT 21 (AM2301)

DHT_Unified dht(DHTPIN, DHTTYPE);


void setup() {
  Serial.begin(115200);
  Wire.begin(D2, D1);
  dht.begin();

   lcd.begin(16, 2);
   lcd.home();
  // Print a message to the LCD.
  lcd.print("hello, world!");
  lcd.backlight();
 }

// the loop function runs over and over again forever
void loop() {
    delay(1000);

  lcd.setCursor(0, 1);

  sensors_event_t event;  
  dht.temperature().getEvent(&event);

  String tempString = String(event.temperature, 2);
  String d = String(tempString + " *C");

  lcd.print(d);


}