#include <DHT.h>
#include <ArduinoJson.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
DynamicJsonDocument doc(1024);
const int dhtPin = 27;
const int triggerPin = 12;
const int echoPin = 14;
int curr = 0;
int prev = 0;


DHT dht(dhtPin, DHT22);

void setup()
{
  lcd.init();
  lcd.backlight();
  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, INPUT_PULLUP);
  Serial.begin(115200);
  dht.begin();


}
void loop()
{
  curr = millis();
  while (curr - prev >= 1000)
  {
    String JsonData;

    float humidity = dht.readHumidity();

    float temperature = dht.readTemperature();
    digitalWrite(triggerPin, LOW);
    delayMicroseconds(2);
    digitalWrite(triggerPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(triggerPin, LOW);
    float duration = pulseIn(echoPin, HIGH);
    float distance = duration * 0.034 / 2;

    doc["Temperature"] = temperature;
    doc["Humiditiy"] = humidity;
    doc["Duration"] = duration;
    doc["Distance"] = String(distance, 0) + " cm";

    serializeJson(doc, JsonData);
    Serial.println(JsonData);

    prev = curr;

  }


}