#include <LiquidCrystal_I2C.h>
#include "DHTesp.h"
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

#define DHT_PIN 15

#define PIR_SENSOR 12

#define LED_PIN 32

String serverName1 = "https://postman-echo.com/get";
String serverName2 = "https://postman-echo.com/post";

DHTesp dhtSensor;

LiquidCrystal_I2C lcd(0x27,20,4); // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup() {

//config LED_PIN output

pinMode(LED_PIN, OUTPUT);

//setup for serial communication
Serial.begin(9600);
Serial.print("Connecting to WiFi");
//setup for WiFi connection
WiFi.begin("Wokwi-GUEST", "", 6);
while (WiFi.status() != WL_CONNECTED) {
  delay(100);
  Serial.print(".");
}
Serial.println("WiFi Connected!");

lcd.init(); // initialize the lcd

// Print a message to the LCD.

lcd.backlight();

lcd.setCursor(1,0);

lcd.print("ESP32 collecting data ...");

delay(1000);

//setup for dht sensor

dhtSensor.setup(DHT_PIN, DHTesp::DHT22);

pinMode(PIR_SENSOR, INPUT);

}

void loop() {

TempAndHumidity data = dhtSensor.getTempAndHumidity();

int temp = data.temperature;

int humid = data.humidity;

String stemp = String(temp) + "C";

String shumid = String(humid) + "%";

lcd.clear();

lcd.setCursor(0,0);

lcd.print("Temp: " + stemp);

lcd.setCursor(0,1);

lcd.print("Humidity: " + shumid);

delay(1000);

if (WiFi.status() == WL_CONNECTED) {

  //HTTP get request, dữ liệu đóng gói url-encoded

  HTTPClient http;
  String serverPath = serverName1 + "?temp=24.7&humid=30";
  http.begin(serverPath.c_str()); // Send HTTP GET request 
  int httpResponseCode = http.GET();
  if (httpResponseCode > 0) {
    Serial.print("HTTP Response code: "); Serial.println(httpResponseCode);
    String payload = http.getString();
    Serial.println(payload);
  }
  else {
    Serial.print("Error code: "); Serial.println(httpResponseCode);
  }
  http.end();

  //HTTP post request, dữ liệu đóng gói url-encoded

  http.begin(serverName2);
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  String httpRequestData = "&temp=" + String(temp) + "&humid=" + String(humid);
  Serial.println(httpRequestData);
  int httpResponseCode2 = http.POST(httpRequestData);
  if (httpResponseCode2 > 0) {
    Serial.print("HTTP Response code: "); Serial.println(httpResponseCode2);
    String payload = http.getString();
    Serial.println(payload);
  }
  else {
    Serial.print("Error code: "); Serial.println(httpResponseCode2);
  }
  http.end();

  //HTTP post request, dữ liệu đóng gói json (trong request body)


  http.begin(serverName2);
  http.addHeader("Content-Type", "application/json");
  DynamicJsonDocument doc(1024);
  String jsonstr;
  JsonObject root = doc.to<JsonObject>();
  root["temperature"] = temp;
  root["humidity"] = humid;
  serializeJson(doc, jsonstr);
  String httpRequestData3 = jsonstr;
  Serial.println(httpRequestData3);
  int httpResponseCode3 = http.POST(httpRequestData3);
  if (httpResponseCode3 > 0) {
    Serial.print("HTTP Response code: "); Serial.println(httpResponseCode3);
    String payload = http.getString();
    Serial.println(payload);
  }
  else {
    Serial.print("Error code: "); Serial.println(httpResponseCode3);
  }
  http.end();

  }
else {
  Serial.println("WiFi Disconnected");
}
delay(3000);

}