Automatic_Bathroom_Sensor_fan_online.ino

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
#include <DHT.h>

char auth[] = "#########";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "#######";
char pass[] = "########";

/////////////3/////////////
// Setting up the pin and DHT version
#define DHTTYPE DHT11   // DHT Shield uses DHT 11
#define DHTPIN D4       // DHT Shield uses pin D4
DHT dht(DHTPIN, DHTTYPE);

// Set Colors of LEDs
/* Not currently used
//Widget Colors

#define BLYNK_Green     "#23C48E"
#define BLYNK_Blue      "#04C0F8"
#define BLYNK_Red       "#D3435C"
*/
//Set up of the Humiditly LED & override LED 
//these are software LEDs in app
WidgetLED humLED(V1); 
WidgetLED overrideLED(V2);

//this timer is used for the blynk app/server and to call data from the sensor
BlynkTimer timer;
//this timer is used to shut off the fan after a cer
SimpleTimer overrideShutOffTimer;


/////////////4/////////////
//Sensor varables
float h = 0;
float t = 0;

//Fan varables
int fanState = 0;
bool fanOverride = false;

// countdown variables and timer
int CountdownRemain;
int CountdownTimer;


/////////////5/////////////
// this funtion gets the data from the sensro and send it to the blynk server for you to see on the app
void sendSensor()
{
  h = dht.readHumidity();
  t = dht.readTemperature(true); // or dht.readTemperature(true) for Fahrenheit

  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  int hAsInt = int(h); // converts to int removing unessisary decimal points
  int tAsInt = int(t);
  Blynk.virtualWrite(V5, hAsInt);
  Blynk.virtualWrite(V6, tAsInt);
  fanControl();
}

/////////////6/////////////
// Fan Override Button
BLYNK_WRITE(V0)
{
  int buttonState = param.asInt();
/*Debug
Serial.print("button pressed: ");
Serial.println(buttonState);
*/
  if(buttonState == 1){
    fanState = 1;
    fanOverride = true;
    overrideLED.on();  
    CountdownRemain = 600;
    overrideShutOffTimer.enable(CountdownTimer);
/*Debug
Serial.print("button State: ");
Serial.print(buttonState);
Serial.print(" fan State: ");
Serial.print(fanState);
Serial.print(" fan override: ");
Serial.println(fanOverride);
*/
  }else{
    fanState = 0;
    fanOverride = true;
    CountdownRemain = 600;
    overrideShutOffTimer.enable(CountdownTimer);
    overrideLED.on(); 

/*Debug 
Serial.print("button State: ");
Serial.print(buttonState);
Serial.print(" fan State: ");
Serial.print(fanState);
Serial.print(" fan override: ");
Serial.println(fanOverride);
*/
  }
    fanControl();
}
/////////////7/////////////
void fanControl()
{
    if(h > 60 && fanOverride != true){
      fanState = 1; //ON
      Blynk.virtualWrite(V0, fanState);
      humLED.on();  
Serial.print("over 60H, ");
    }
    else if(h < 50 && fanOverride != true){
      fanState = 0; //OFF
      Blynk.virtualWrite(V0, fanState);
      humLED.off();  
Serial.print("less than 50H, ");   
    }
    else{
Serial.print("fan override, ");
    }
    digitalWrite(D1, fanState);
/* Debug
Serial.print(" fan State: ");
Serial.print(fanState);
Serial.print(" fan override: ");
Serial.println(fanOverride);
*/
}
void CountdownTimerFunction() {
Serial.print("countdown function called ");
  CountdownRemain--; // remove 1 every second
Serial.println(CountdownRemain);
  Blynk.virtualWrite(V3, CountdownRemain);
  if (!CountdownRemain) { // check if CountdownRemain == 0/FALSE/LOW
    overrideShutOffTimer.disable(CountdownTimer); // if 0 stop timer
    CountdownRemain = 600;
    fanOverride = false;
    overrideLED.off();
/*Debug
Serial.println("counter if");
*/
  } else {
    //manLED.off();
Serial.println("counter else");
  }
}
void setup()
{
  // Debug console
  Serial.begin(9600);
  pinMode(D1, OUTPUT); // Set the relay output up
  Blynk.begin(auth, ssid, pass);
   // Setup a function to be called every 5 seconds
  timer.setInterval(5000L, sendSensor);
  //Shut off the manual over ride
  CountdownTimer = overrideShutOffTimer.setInterval(1000L, CountdownTimerFunction); 
  overrideShutOffTimer.disable(CountdownTimer);
}
void loop()
{
  Blynk.run();
  timer.run();
  overrideShutOffTimer.run();
}