// Breno Correia Lociks
// Exercício 4

#include <WiFi.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>
#include "ThingSpeak.h"
#include "secrets.h"

const int OneWireBus = 4;
OneWire oneWire(OneWireBus);
DallasTemperature sensors(&oneWire);

LiquidCrystal_I2C lcd(0x27,16,2);

char ssid[] = "Wokwi-GUEST"; 
char pass[] = "";

int keyIndex = 0;

WiFiClient  client;

unsigned long myChannelNumber = CHANNEL_ID;
const char * myWriteAPIKey = WRITE_API_KEY;

void setup() {
  Serial.begin(115200);

  sensors.begin();

  lcd.init();
  lcd.setBacklight(HIGH);

  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("Wokwi-CLIENT");

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

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

  sensors.requestTemperatures();
  float temperaturaC = sensors.getTempCByIndex(0);

  lcd.setCursor(0,0);
  lcd.print(temperaturaC);
  lcd.print(" C        ");

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

  if(x == 200) {
    Serial.println("Channel update successful.");
  }
  else {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }
  delay(20000);
}