blynk_switch_feedback.ino

//Blynk Home Automation with Physical Button and ON OFF State Feedback


#define BLYNK_PRINT Serial            
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <ESP8266mDNS.h>  // For OTA with ESP8266
#include <WiFiUdp.h>  // For OTA
#include <ArduinoOTA.h>  // For OTA


BlynkTimer timer;

void checkPhysicalButton();

int relay1State = LOW;
int pushButton1State = HIGH;

int relay2State = LOW;
int pushButton2State = HIGH;

int relay3State = LOW;
int pushButton3State = HIGH;

int relay4State = LOW;
int pushButton4State = HIGH;

#define AUTH "---------------------------"  // You should get Auth Token in the Blynk App.  
#define WIFI_SSID "------"                   //Enter Wifi Name
#define WIFI_PASS "------"                   //Enter wifi Password

#define SERVER "blynk-cloud.com "             // Comment-out if use Blynk hosted cloud service
#define PORT 8442

#define RELAY_PIN_1      16   //D0
#define RELAY_PIN_2       5   //D1 
#define RELAY_PIN_3       4   //D2
#define RELAY_PIN_4       0   //D3



#define PUSH_BUTTON_1    14   //D5
#define PUSH_BUTTON_2    12   //D6
#define PUSH_BUTTON_3    13   //D7
#define PUSH_BUTTON_4     1   //TX



#define VPIN_BUTTON_2    V12 
#define VPIN_BUTTON_1    V13
#define VPIN_BUTTON_3    V14
#define VPIN_BUTTON_4    V15  


#define OTA_HOSTNAME "Home_Automation"


BLYNK_CONNECTED() {

  // Request the latest state from the server

  Blynk.syncVirtual(VPIN_BUTTON_1);
  Blynk.syncVirtual(VPIN_BUTTON_2);
   Blynk.syncVirtual(VPIN_BUTTON_3);
  Blynk.syncVirtual(VPIN_BUTTON_4);

  // Alternatively, you could override server state using:
 Blynk.virtualWrite(VPIN_BUTTON_1, relay1State);
 Blynk.virtualWrite(VPIN_BUTTON_2, relay2State);
 Blynk.virtualWrite(VPIN_BUTTON_3, relay3State);
 Blynk.virtualWrite(VPIN_BUTTON_4, relay4State);

}

// When App button is pushed - switch the state

BLYNK_WRITE(VPIN_BUTTON_1) {
  relay1State = param.asInt();
  digitalWrite(RELAY_PIN_1, relay1State);
}

BLYNK_WRITE(VPIN_BUTTON_2) {
  relay2State = param.asInt();
  digitalWrite(RELAY_PIN_2, relay2State);
}
BLYNK_WRITE(VPIN_BUTTON_3) {
  relay3State = param.asInt();
  digitalWrite(RELAY_PIN_3, relay3State);
}
BLYNK_WRITE(VPIN_BUTTON_4) {
  relay4State = param.asInt();
  digitalWrite(RELAY_PIN_4, relay4State);
}

void checkPhysicalButton()
{
  if (digitalRead(PUSH_BUTTON_1) == LOW) {
    // pushButton1State is used to avoid sequential toggles
    if (pushButton1State != LOW) {

      // Toggle Relay state
      relay1State = !relay1State;
      digitalWrite(RELAY_PIN_1, relay1State);

      // Update Button Widget
      Blynk.virtualWrite(VPIN_BUTTON_1, relay1State);
    }
    pushButton1State = LOW;
  } else {
    pushButton1State = HIGH;
  }

  if (digitalRead(PUSH_BUTTON_2) == LOW) {
    // pushButton2State is used to avoid sequential toggles
    if (pushButton2State != LOW) {

      // Toggle Relay state
      relay2State = !relay2State;
      digitalWrite(RELAY_PIN_2, relay2State);

      // Update Button Widget
      Blynk.virtualWrite(VPIN_BUTTON_2, relay2State);
    }
    pushButton2State = LOW;
  } else {
    pushButton2State = HIGH;
  }

  if (digitalRead(PUSH_BUTTON_3) == LOW) {
    // pushButton3State is used to avoid sequential toggles
    if (pushButton3State != LOW) {

      // Toggle Relay state
      relay3State = !relay3State;
      digitalWrite(RELAY_PIN_3, relay3State);

      // Update Button Widget
      Blynk.virtualWrite(VPIN_BUTTON_3, relay3State);
    }
    pushButton3State = LOW;
  } else {
    pushButton3State = HIGH;
  }

  if (digitalRead(PUSH_BUTTON_4) == LOW) {
    // pushButton4State is used to avoid sequential toggles
    if (pushButton4State != LOW) {

      // Toggle Relay state
      relay4State = !relay4State;
      digitalWrite(RELAY_PIN_4, relay4State);

      // Update Button Widget
      Blynk.virtualWrite(VPIN_BUTTON_4, relay4State);
    }
    pushButton4State = LOW;
  } else {
    pushButton4State = HIGH;
  }
}

void setup()
{

  Serial.begin(115200);
  Blynk.begin(AUTH, WIFI_SSID, WIFI_PASS,"blynk-cloud.com", 8442);
  ArduinoOTA.setHostname(OTA_HOSTNAME);  // For OTA - Use your own device identifying name
  ArduinoOTA.begin();  // For OTA

  pinMode(RELAY_PIN_1, OUTPUT);
  pinMode(PUSH_BUTTON_1, INPUT_PULLUP);
  digitalWrite(RELAY_PIN_1, relay1State);


  pinMode(RELAY_PIN_2, OUTPUT);
  pinMode(PUSH_BUTTON_2, INPUT_PULLUP);
  digitalWrite(RELAY_PIN_2, relay2State);


  pinMode(RELAY_PIN_3, OUTPUT);
  pinMode(PUSH_BUTTON_3, INPUT_PULLUP);
  digitalWrite(RELAY_PIN_3, relay3State);


  pinMode(RELAY_PIN_4, OUTPUT);
  pinMode(PUSH_BUTTON_4, INPUT_PULLUP);
  digitalWrite(RELAY_PIN_4, relay4State);

  // Setup a function to be called every 100 ms
  timer.setInterval(500L, checkPhysicalButton);
}

void loop()
{
  Blynk.run();
  ArduinoOTA.handle();  // For OTA
  timer.run();
}