ESP8266 & DHT22 Code

/*
    
    Using Adafruit Huzzah ESP8266 to Dweet humidity, temp and float switch stats that end up on a Freeboard dashboard.  
     7/7 Added float switch
     7/15 Float switch connected to pin # 4 and gnd
     7/15 humidity sensor goes to pin # 2
*/

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <ESP8266HTTPClient.h>
#include "DHT.h"


#define DHTPIN 2

#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);


const char* ssid = "xxxxxxxxx";
const char* password = "xxxxxxxxxxxx";

const char* host = "dweet.io";
const int httpsPort = 443;
String theDate = "";

int h = 0; // humidity
int t = 0; // temp in celsius
int f = 0; // temp in farenheit
int p = 0; // sump pump

int floatSwitchPin = 4; // pump pin
int pumpValue = 0;

unsigned long previousMillis = 0;
//const long interval = 3000000; // 30000 = 5 minutes
const long interval = 180000;
void setup() {
  Serial.begin(115200);
  //pinMode(pumpPin, INPUT);
  pinMode(floatSwitchPin, INPUT_PULLUP);
  // pinMode(floatSwitchPin, INPUT);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(F("."));
  }
  Serial.println("");
  Serial.print(F("WiFi connected to "));
  Serial.print(F("IP address: "));
  Serial.println(WiFi.localIP());
  delay(200);

  WiFiClientSecure client;

  if (!client.connect(host, httpsPort)) {
    Serial.println(F("connection failed"));
    return;
  }
  checkPump();
  getWeather();
  postData();

}

void loop() {
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    checkPump();
    getWeather();
    postData();
  }
}

void postData() {
  HTTPClient http;
  char temp[400];
  snprintf ( temp, 400, "{\"Temperature\":%02d,\"Humidity\":%02d,\"Pump\":%01d}", f, h, p);
  Serial.print(F("Posting data......."));
  Serial.println(temp);
  http.begin("http://dweet.io/dweet/for/insertyouruniquenamehere?");
  http.addHeader("Content-Type", "application/json");

  int  httpCode = http.POST(temp);

  if (httpCode == 204 || httpCode == 200)
    Serial.println(F("Successful posting of data"));
  else
    Serial.println (httpCode);

  Serial.println("");

  http.end();  //Close connection
  // reset temp and humidity values after posting data
  h = 0;
  f = 0;
}

void getWeather() {
  Serial.println(F("Getting weather"));

  // get avg in case reading is off
  for (int i = 0; i < 3; i++) {
    h = h + dht.readHumidity();
    t = t + dht.readTemperature();
    f = f + dht.readTemperature(true);
  }
  h = h / 3;
  f = f / 3;

  Serial.print(F("Temperature = "));
  Serial.print(f);
  Serial.print(F(" Humidity = "));
  Serial.print(h);
  Serial.print(F(" Pump = "));
  if (p == 0)
    Serial.println(F("Off"));
  else {
    Serial.println(F("On"));

  }
}

void checkPump() {
  pumpValue = digitalRead(floatSwitchPin);
  Serial.print(F("Float Switch = "));
  Serial.println(pumpValue);
  p = pumpValue;
  delay(150);
}