//Quarto Sketch Ultra com biblioteca+WiFi+ThingSpeak

#include <WiFi.h>
#include <WiFiClient.h>
#include <Ultrasonic.h>
#include "ThingSpeak.h"


//Configurações WiFI
#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""
//Definir o canal do WIfi - aumentar a velocidade de conexão
#define WIFI_CHANNEL 6
int status = WL_IDLE_STATUS;


const int myChannelNumber = 2680244;
const char* myApiKey = "ET979B8HQASA2GT5";
const char* server = "api.thingspeak.com";


WiFiClient client;


#define TRIG_PIN 12
#define ECHO_PIN 14


long previousDistance = 0;


Ultrasonic ultrasonic(TRIG_PIN, ECHO_PIN);


//vaiaveis globais


int ultimoValor = 0;
unsigned long ultimaAtualizacao = 0;
const unsigned long intervaloEnvio = 15000;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  conectawifi();
}


void loop() {
  delay(10);
  int distancia = ultrasonic.read();


  //verifica se o intervalo de 15 segundos desde a última atualização foi atingido
  if(millis() - ultimaAtualizacao >= intervaloEnvio){
    Serial.println(distancia);


    ultimaAtualizacao = millis();


    ThingSpeak.setField(1, distancia);


    int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);


    if(x == 200){
      Serial.println("Dado enviado com sucesso");
    }else{
      Serial.println("Erro de envio: "+ String(x));
    }
  }
  delay(100);
}


void conectawifi(){
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD, WIFI_CHANNEL);


  Serial.print("Conectando ao WiFi");
  Serial.print(WIFI_SSID);


  //Esperar até conectar
  while (WiFi.status() != WL_CONNECTED){
    delay(100);
    Serial.print(".");
  }


  Serial.println(" Conectado!");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());


  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}