#include <WiFi.h>
#include <HTTPClient.h>
#include <ESP32Servo.h>
#include <Arduino_JSON.h>


const int ldr = 34;
const int trig = 19;
const int echo = 18;
int servoPin = 15;


int ldrValue;
long echotime;
float distance;


const char* ssid ="Wokwi-GUEST";
const char* pass ="";

String serverName = "https://sgp1.blynk.cloud/external/api/batch/update?token=6hEJQQNYFs0vP4klZ0Uoteugwe2JmVlw&v0=";
String serverName2 = "https://sgp1.blynk.cloud/external/api/get?token=6hEJQQNYFs0vP4klZ0Uoteugwe2JmVlw&v0&v1&v2";

Servo servo;



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  servo.attach(servoPin, 500, 2400);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  digitalWrite(trig, LOW);
  WiFi.begin(ssid,pass);
  while (WiFi.status() != WL_CONNECTED){
  delay(500);
  Serial.print('.');
  }
Serial.print('wifi terhubung dengan ip address: ');
  Serial.println(WiFi.localIP());
}

void loop() {
      HTTPClient http;
  String serverPath,mybuff;
  int httpResponseCode;
  byte dataservo;
  // put your main code here, to run repeatedly:
    digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  echotime= pulseIn(echo, HIGH);
  distance= 0.0001*((float)echotime*340.0)/2.0;
 
ldrValue= analogRead(ldr);
Serial.print("Nilai LDR :");
 Serial.println(ldrValue);
Serial.print("Jarak :");
 Serial.println(distance);

if (WiFi.status() ==  WL_CONNECTED){
  serverPath = serverName + String(ldrValue) + "&v1=" + String(distance);
   http.begin(serverPath);
  httpResponseCode = http.GET();
  if (httpResponseCode==200) 
    {
      Serial.println("HTTP Response code: " + String(httpResponseCode)); 
    }
    http.end();
  }  // this speeds up the simulation
 else
  {
    Serial.println("WiFi Disconnected");
  }

  if(WiFi.status()== WL_CONNECTED)
  {
    serverPath = serverName2;
    http.begin(serverPath);
    httpResponseCode = http.GET();
    if (httpResponseCode==200)
    {
      String payload = http.getString();
      JSONVar myObject = JSON.parse(payload);
      if (JSON.typeof(myObject) == "undefined")
      {
        Serial.println("Parsing error bro!");
      }
      else
      {
        JSONVar mykeys = myObject.keys();
        mybuff = JSON.stringify(myObject[mykeys[2]]);
        Serial.print("ini valuenya: ");
        Serial.println(mybuff); //json format from server is {"v0":29.6,"v1":89.1,"v2":1}
        dataservo=mybuff.toInt();
        Serial.println(dataservo);

        servo.write(dataservo);

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

}