#include <Wire.h>
#include <WiFi.h>
#include "ThingSpeak.h"
#define SECRET_SSID "Wokwi-GUEST"
#define SECRET_PASS ""
#define SECRET_CH_ID 2575218
#define SECRET_WRITE_APIKEY "T99J3OQA3A62CPGV"

char ssid[] = SECRET_SSID;
char pass[] = SECRET_PASS;
int keyIndex = 0;
WiFiClient client;
unsigned long myChannelNumber = SECRET_CH_ID;
const char *myWriteAPIKey = SECRET_WRITE_APIKEY;
int pinTEMP = 32;
float temp = 0.00;

const float BETA = 3950;              // Variável do coeficiente BETA do termistor

#define interruptPin 5
uint16_t pulse;
uint16_t count;
float frequency;

void setup() {
  pinMode(pinTEMP, INPUT);
  analogReadResolution(10);      // Define o tamanho (em bits) dos valores lido em 10 bits (valores de 0 a 1023)
  Serial.begin(9600);

  while (!Serial) {
    ;
  }

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

void loop() {

    if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(SECRET_SSID);

    while (WiFi.status() != WL_CONNECTED) {
      WiFi.begin(ssid, pass);
      Serial.print(".");
      delay(5000);
    }

    Serial.println("\nConnected to WiFi");
  }

  float pinval = analogRead(pinTEMP);
  float temp = 1 / (log(1 / (1023. / pinval - 1)) / BETA + 1.0 / 298.15) - 273.15;

  Frequency();
  
  Serial.println("Temperature reading: " + String(temp));
  ThingSpeak.setField(1, temp);
  ThingSpeak.setField(2, frequency);

  int x = ThingSpeak.writeField(myChannelNumber, 1, temp, myWriteAPIKey);
  



  if (x == 200) {
    Serial.println("Channel update successful");
  } else {
    Serial.print("Problem updating channel. HTTP error code: ");
    Serial.println(x);

    if (x == -101) {
      Serial.println("WiFi network disconnected. Attempting to reconnect...");
    } else if (x == -301) {
      Serial.println("Unable to connect to ThingSpeak server.");
    } else if (x == -303) {
      Serial.println("Timeout while waiting for ThingSpeak server response.");
    } else {
      Serial.println("Unknown error.");
    }
  }

  delay(1000); // Delay for 10 seconds before next iteration
}


void Frequency() {
  static unsigned long startTime;
  if (millis() - startTime < 1000 ) return;   // 1000 milliseconds Interval
  startTime = millis();

  cli();
  count = pulse;
  pulse = 0;

  frequency = count / 2.0f;

  PlotInfo();
}

void PlotInfo() {
  Serial.print("Freq.:= " + String(frequency, 2) + " Hz");
}