Weather Station

#include <SoftwareSerial.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

#define SEALEVELPRESSURE_HPA (1013.25)

Adafruit_BME280 bme;

SoftwareSerial ESP8266(2, 3); // Rx,  Tx

float humidity, temp_f, pressure;
long writingTimer = 30;
long startTime = 0;
long waitTime = 0;
String myAPIkey = "myapikey";



//boolean relay1_st = false;
//boolean relay2_st = false;
unsigned char check_connection = 0;
unsigned char times_check = 0;
//boolean error;

void setup()
{
  Serial.begin(9600);
  ESP8266.begin(9600);

  if (!bme.begin(0x76)) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    while (1);
  }
  //
  connectToThingSpeak();
}

void loop()
{
  waitTime = millis() - startTime;
  if (waitTime > (writingTimer * 1000))
  {
    readSensors();
    writeThingSpeak();
    startTime = millis();
  }
}

void connectToThingSpeak(void)
{

  startTime = millis();
  ESP8266.println("AT+RST");
  delay(2000);
  Serial.println("Connecting to Wifi");
  while (check_connection == 0)
  {
    Serial.print(".");
    ESP8266.print("AT+CWJAP=\"myssid\",\"mypwd\"\r\n");
    ESP8266.setTimeout(5000);
    if (ESP8266.find("WIFI CONNECTED\r\n") == 1)
    {
      Serial.println("WIFI CONNECTED");
      break;
    }
    times_check++;
    if (times_check > 3)
    {
      times_check = 0;
      Serial.println("Trying to Reconnect..");
    }
  }
}

void readSensors(void)
{
  temp_f = bme.readTemperature();
  humidity = bme.readHumidity();
  pressure = bme.readPressure() / 1000.0F;
}


void writeThingSpeak(void)
{
  startThingSpeakCmd();
  // preparacao da string GET
  String getStr = "GET /update?api_key=";
  getStr += myAPIkey;
  getStr += "&field1=";
  getStr += String(temp_f);
  getStr += "&field2=";
  getStr += String(humidity);
  getStr += "&field3=";
  getStr += String(pressure);
  getStr += "\r\n\r\n";
  GetThingspeakcmd(getStr);
}

void startThingSpeakCmd(void)
{
  ESP8266.flush();
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += "184.106.153.149"; // api.thingspeak.com IP address
  cmd += "\",80";
  ESP8266.println(cmd);
  Serial.print("Start Commands: ");
  Serial.println(cmd);

  if (ESP8266.find("Error"))
  {
    Serial.println("AT+CIPSTART error");
    return;
  }
}

String GetThingspeakcmd(String getStr)
{
  String cmd = "AT+CIPSEND=";
  cmd += String(getStr.length());
  ESP8266.println(cmd);
  Serial.println(cmd);

  if (ESP8266.find(">"))
  {
    ESP8266.print(getStr);
    Serial.println(getStr);
    delay(500);
    String messageBody = "";
    while (ESP8266.available())
    {
      String line = ESP8266.readStringUntil('\n');
      if (line.length() == 1)
      {
        messageBody = ESP8266.readStringUntil('\n');
      }
    }
    Serial.print("MessageBody received: ");
    Serial.println(messageBody);
    return messageBody;
  }
  else
  {
    ESP8266.println("AT+CIPCLOSE");
    Serial.println("AT+CIPCLOSE");
  }
}