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Turn on/off 4 lights using 4 physical buttons and blynk

esp8266

#1

hello dear friends
i copy blynk example for sync physical button and modify according to my project.now i am having a problem that 2 physical buttons works well and also sync with blynk app but other 2 physical buttons dose’not work …but app switch works well…
please help me. here is code which i use.
suggestions will appreciated in advance.

#define BLYNK_PRINT Serial


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

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxxxxxxxxxxxxxxx";

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

// Set your LED and physical button pins here
const int ledPin1 = 12;
const int ledPin2 = 13;
const int ledPin3 = 14;
const int ledPin4 = 15;
const int btnPin1 = 5;
const int btnPin2 = 4;
const int btnPin3 = 2;
const int btnPin4 = 0;

BlynkTimer timer;
void checkPhysicalButton();

int led1State = LOW;
int btn1State = HIGH;

int led2State = LOW;
int btn2State = HIGH;

int led3State = LOW;
int btn3State = HIGH;

int led4State = LOW;
int btn4State = HIGH;

// Every time we connect to the cloud...
BLYNK_CONNECTED() {
  // Request the latest state from the server
  Blynk.syncVirtual(V12);
  Blynk.syncVirtual(V13);
  Blynk.syncVirtual(V14);
  Blynk.syncVirtual(V15);

  // Alternatively, you could override server state using:
  //Blynk.virtualWrite(V12, led1State);
  //Blynk.virtualWrite(V13, led2State);
  //Blynk.virtualWrite(V14, led3State);
  //Blynk.virtualWrite(V15, led4State);

}

// When App button is pushed - switch the state
BLYNK_WRITE(V12) {
  led1State = param.asInt();
  digitalWrite(ledPin1, led1State);
}
  
 BLYNK_WRITE(V13) {
  led2State = param.asInt();
  digitalWrite(ledPin2, led2State);
 }
BLYNK_WRITE(V14) {
  led3State = param.asInt();
  digitalWrite(ledPin3, led3State);
}
BLYNK_WRITE(V15) {
  led4State = param.asInt();
  digitalWrite(ledPin4, led4State);
}

void checkPhysicalButton()
{
  if (digitalRead(btnPin1) == LOW) {
    // btn1State is used to avoid sequential toggles
    if (btn1State != LOW) {

      // Toggle LED state
      led1State = !led1State;
      digitalWrite(ledPin1, led1State);

      // Update Button Widget
      Blynk.virtualWrite(V12, led1State);
    }
    btn1State = LOW;
  } else {
    btn1State = HIGH;
  }

  if (digitalRead(btnPin2) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn2State != LOW) {

      // Toggle LED state
      led2State = !led2State;
      digitalWrite(ledPin2, led2State);

      // Update Button Widget
      Blynk.virtualWrite(V13, led2State);
    }
    btn2State = LOW;
  } else {
    btn2State = HIGH;
  }

  if (digitalRead(btnPin3) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn3State != LOW) {

      // Toggle LED state
      led3State = !led3State;
      digitalWrite(ledPin3, led3State);

      // Update Button Widget
      Blynk.virtualWrite(V14, led3State);
    }
    btn3State = LOW;
  } else {
    btn3State = HIGH;
  }

  if (digitalRead(btnPin4) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn4State != LOW) {

      // Toggle LED state
      led4State = !led4State;
      digitalWrite(ledPin4, led4State);

      // Update Button Widget
      Blynk.virtualWrite(V15, led4State);
    }
    btn4State = LOW;
  } else {
    btn4State = HIGH;
  }
}

void setup()
{
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);

 { pinMode(ledPin1, OUTPUT);
  pinMode(btnPin1, INPUT_PULLUP);
  digitalWrite(ledPin1, led1State);
  timer.setInterval(100L, checkPhysicalButton);}

 { pinMode(ledPin2, OUTPUT);
  pinMode(btnPin2, INPUT_PULLUP);
  digitalWrite(ledPin2, led2State);
  timer.setInterval(100L, checkPhysicalButton);}
{
  pinMode(ledPin3, OUTPUT);
  pinMode(btnPin3, INPUT_PULLUP);
  digitalWrite(ledPin3, led3State);
  timer.setInterval(100L, checkPhysicalButton);}

 { pinMode(ledPin4, OUTPUT);
  pinMode(btnPin4, INPUT_PULLUP);
  digitalWrite(ledPin4, led4State);

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

void loop()
{
  Blynk.run();
  timer.run();
}

#2

You only need

timer.setInterval(100L, checkPhysicalButton);

once in your setup()

Also remove the brackets around all of these, they are not needed

{ pinMode(ledPin1, OUTPUT);
  pinMode(btnPin1, INPUT_PULLUP);
  digitalWrite(ledPin1, led1State);
  timer.setInterval(100L, checkPhysicalButton);}

 { pinMode(ledPin2, OUTPUT);
  pinMode(btnPin2, INPUT_PULLUP);
  digitalWrite(ledPin2, led2State);
  timer.setInterval(100L, checkPhysicalButton);}
{
  pinMode(ledPin3, OUTPUT);
  pinMode(btnPin3, INPUT_PULLUP);
  digitalWrite(ledPin3, led3State);
  timer.setInterval(100L, checkPhysicalButton);}

 { pinMode(ledPin4, OUTPUT);
  pinMode(btnPin4, INPUT_PULLUP);
  digitalWrite(ledPin4, led4State);

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

#3

You setup() should look like this

void setup()
{
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);

  pinMode(ledPin1, OUTPUT);
  pinMode(btnPin1, INPUT_PULLUP);
  digitalWrite(ledPin1, led1State);
 

   pinMode(ledPin2, OUTPUT);
  pinMode(btnPin2, INPUT_PULLUP);
  digitalWrite(ledPin2, led2State);
  
  pinMode(ledPin3, OUTPUT);
  pinMode(btnPin3, INPUT_PULLUP);
  digitalWrite(ledPin3, led3State);
 
  pinMode(ledPin4, OUTPUT);
  pinMode(btnPin4, INPUT_PULLUP);
  digitalWrite(ledPin4, led4State);

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

#4

i change the code as you said dear but problem remains.
led1,led2 and btn1,btn2 works fine both physical and blynk.
but physical btn3,and btn4 dosen’t works. but led’s connected to these buttons work with bytnk app not with physical buttons.

here is code.

#define BLYNK_PRINT Serial


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

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "axxxxxxxf";

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

// Set your LED and physical button pins here
const int ledPin1 = 12;
const int ledPin2 = 13;
const int ledPin3 = 14;
const int ledPin4 = 15;
const int btnPin1 = 5;
const int btnPin2 = 4;
const int btnPin3 = 2;
const int btnPin4 = 0;

BlynkTimer timer;
void checkPhysicalButton();

int led1State = LOW;
int btn1State = HIGH;

int led2State = LOW;
int btn2State = HIGH;

int led3State = LOW;
int btn3State = HIGH;

int led4State = LOW;
int btn4State = HIGH;

// Every time we connect to the cloud...
BLYNK_CONNECTED() {
  // Request the latest state from the server
  Blynk.syncVirtual(V12);
  Blynk.syncVirtual(V13);
  Blynk.syncVirtual(V14);
  Blynk.syncVirtual(V15);

  // Alternatively, you could override server state using:
  //Blynk.virtualWrite(V12, led1State);
  //Blynk.virtualWrite(V13, led2State);
  //Blynk.virtualWrite(V14, led3State);
  //Blynk.virtualWrite(V15, led4State);

}

// When App button is pushed - switch the state
BLYNK_WRITE(V12) {
  led1State = param.asInt();
  digitalWrite(ledPin1, led1State);
}
  
 BLYNK_WRITE(V13) {
  led2State = param.asInt();
  digitalWrite(ledPin2, led2State);
 }
BLYNK_WRITE(V14) {
  led3State = param.asInt();
  digitalWrite(ledPin3, led3State);
}
BLYNK_WRITE(V15) {
  led4State = param.asInt();
  digitalWrite(ledPin4, led4State);
}

void checkPhysicalButton()
{
  if (digitalRead(btnPin1) == LOW) {
    // btn1State is used to avoid sequential toggles
    if (btn1State != LOW) {

      // Toggle LED state
      led1State = !led1State;
      digitalWrite(ledPin1, led1State);

      // Update Button Widget
      Blynk.virtualWrite(V12, led1State);
    }
    btn1State = LOW;
  } else {
    btn1State = HIGH;
  }

  if (digitalRead(btnPin2) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn2State != LOW) {

      // Toggle LED state
      led2State = !led2State;
      digitalWrite(ledPin2, led2State);

      // Update Button Widget
      Blynk.virtualWrite(V13, led2State);
    }
    btn2State = LOW;
  } else {
    btn2State = HIGH;
  }

  if (digitalRead(btnPin3) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn3State != LOW) {

      // Toggle LED state
      led3State = !led3State;
      digitalWrite(ledPin3, led3State);

      // Update Button Widget
      Blynk.virtualWrite(V14, led3State);
    }
    btn3State = LOW;
  } else {
    btn3State = HIGH;
  }

  if (digitalRead(btnPin4) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn4State != LOW) {

      // Toggle LED state
      led4State = !led4State;
      digitalWrite(ledPin4, led4State);

      // Update Button Widget
      Blynk.virtualWrite(V15, led4State);
    }
    btn4State = LOW;
  } else {
    btn4State = HIGH;
  }
}

void setup()
{
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);

  pinMode(ledPin1, OUTPUT);
  pinMode(btnPin1, INPUT_PULLUP);
  digitalWrite(ledPin1, led1State);
  

  pinMode(ledPin2, OUTPUT);
  pinMode(btnPin2, INPUT_PULLUP);
  digitalWrite(ledPin2, led2State);
  

  pinMode(ledPin3, OUTPUT);
  pinMode(btnPin3, INPUT_PULLUP);
  digitalWrite(ledPin3, led3State);
  

  pinMode(ledPin4, OUTPUT);
  pinMode(btnPin4, INPUT_PULLUP);
  digitalWrite(ledPin4, led4State);

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

void loop()
{
  Blynk.run();
  timer.run();
}``Preformatted text`

#5

I guess you’re using an ESP8266-12. I suggest to use these pins: 10, 4, 16, 12, 15, 5, 13, 14. Pin 2 is the onboard LED.


#6

dosent work dear

/ Set your LED and physical button pins here
const int ledPin1 = 12;
const int ledPin2 = 13;
const int ledPin3 = 14;
const int ledPin4 = 15;
const int btnPin1 = 5;
const int btnPin2 = 4;
const int btnPin3 = 10;
const int btnPin4 = 16;

#7

Hmmm, the code looks good. Unless there is something I am overlooking.

Maybe try increasing the timer interval, perhaps the timer is restarting the routine before it has time to reach those parts of the code. I am not certain this is the issue as I have done almost this exact same thing (expanding example to 4 buttons and relay) before and did not have any issues.

I will have to dig and see if I can find my old code to compare.


#8

thanks for helping me…
can’t understand 2 buttons works fine and other 2 are not working.


#9

switch 'em around and see if the problem moves :nerd_face:


#10

thanks to all of you Toro_Blanco and Emilio
now its works fine…
now i want to add on demand wifi portal for ssid and password…any suggestions?

here is working code

#define BLYNK_PRINT Serial


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

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxxxxxxxxx";

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

// Set your LED and physical button pins here
const int ledPin1 = 12;
const int ledPin2 = 13;
const int ledPin3 = 14;
const int ledPin4 = 15;
const int btnPin1 = 5;
const int btnPin2 = 4;
const int btnPin3 = 9;
const int btnPin4 = 1;

BlynkTimer timer;
void checkPhysicalButton();

int led1State = LOW;
int btn1State = HIGH;

int led2State = LOW;
int btn2State = HIGH;

int led3State = LOW;
int btn3State = HIGH;

int led4State = LOW;
int btn4State = HIGH;

// Every time we connect to the cloud...
BLYNK_CONNECTED() {
  // Request the latest state from the server
  Blynk.syncVirtual(V12);
  Blynk.syncVirtual(V13);
  Blynk.syncVirtual(V14);
  Blynk.syncVirtual(V15);

  // Alternatively, you could override server state using:
  //Blynk.virtualWrite(V12, led1State);
  //Blynk.virtualWrite(V13, led2State);
  //Blynk.virtualWrite(V14, led3State);
  //Blynk.virtualWrite(V15, led4State);

}

// When App button is pushed - switch the state
BLYNK_WRITE(V12) {
  led1State = param.asInt();
  digitalWrite(ledPin1, led1State);
}
  
 BLYNK_WRITE(V13) {
  led2State = param.asInt();
  digitalWrite(ledPin2, led2State);
 }
BLYNK_WRITE(V14) {
  led3State = param.asInt();
  digitalWrite(ledPin3, led3State);
}
BLYNK_WRITE(V15) {
  led4State = param.asInt();
  digitalWrite(ledPin4, led4State);
}

void checkPhysicalButton()
{
  if (digitalRead(btnPin1) == LOW) {
    // btn1State is used to avoid sequential toggles
    if (btn1State != LOW) {

      // Toggle LED state
      led1State = !led1State;
      digitalWrite(ledPin1, led1State);

      // Update Button Widget
      Blynk.virtualWrite(V12, led1State);
    }
    btn1State = LOW;
  } else {
    btn1State = HIGH;
  }

  if (digitalRead(btnPin2) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn2State != LOW) {

      // Toggle LED state
      led2State = !led2State;
      digitalWrite(ledPin2, led2State);

      // Update Button Widget
      Blynk.virtualWrite(V13, led2State);
    }
    btn2State = LOW;
  } else {
    btn2State = HIGH;
  }

  if (digitalRead(btnPin3) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn3State != LOW) {

      // Toggle LED state
      led3State = !led3State;
      digitalWrite(ledPin3, led3State);

      // Update Button Widget
      Blynk.virtualWrite(V14, led3State);
    }
    btn3State = LOW;
  } else {
    btn3State = HIGH;
  }

  if (digitalRead(btnPin4) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn4State != LOW) {

      // Toggle LED state
      led4State = !led4State;
      digitalWrite(ledPin4, led4State);

      // Update Button Widget
      Blynk.virtualWrite(V15, led4State);
    }
    btn4State = LOW;
  } else {
    btn4State = HIGH;
  }
}

void setup()
{
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);

  pinMode(ledPin1, OUTPUT);
  pinMode(btnPin1, INPUT_PULLUP);
  digitalWrite(ledPin1, led1State);
  

  pinMode(ledPin2, OUTPUT);
  pinMode(btnPin2, INPUT_PULLUP);
  digitalWrite(ledPin2, led2State);
  

  pinMode(ledPin3, OUTPUT);
  pinMode(btnPin3, INPUT_PULLUP);
  digitalWrite(ledPin3, led3State);
  

  pinMode(ledPin4, OUTPUT);
  pinMode(btnPin4, INPUT_PULLUP);
  digitalWrite(ledPin4, led4State);

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

void loop()
{
  Blynk.run();
  timer.run();
}

#11

Check this
and this fyi


#12

Just to be clear in case other users read this post.

Was the solution to increase the timer interval? or was it something else?


#13

No its not timer interval.
by changing the pins it works fine
i replace pin 0(D3) to 1(TX) and pin 2(D4) to 9(S3) and it start working.

const int ledPin1 = 12;
const int ledPin2 = 13;
const int ledPin3 = 14;
const int ledPin4 = 15;
const int btnPin1 = 5;
const int btnPin2 = 4;
const int btnPin3 = 9;
const int btnPin4 = 1;

#14

But the code you posted last also has the timer interval increased from .1 Seconds to .5 Seconds. Just to confirm it works with the timer interval at 100L as well?


#15

yes it works with time interval 100L and woks brtter than 500L .by using 500L it lag little.


#16

dear @Emilio i think that is pretty simple for only wifi ssid and pass. not for blynk token.
your code is pretty good also for token+wifi ssid and pass.

here is code for 4 channel with physical button and blynk.
thanks a lot for helping.your idea of changing pins works for me.

#define BLYNK_PRINT Serial
#include <ESP8266WebServer.h>
#include <WiFiManager.h>      //https://github.com/tzapu/WiFiManager
#include <DNSServer.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "a6251c25aeb94be79c54d2401c6f9bbf";

// Your WiFi credentials.
// Set password to "" for open networks.

// Set your LED and physical button pins here
const int ledPin1 = 12;
const int ledPin2 = 13;
const int ledPin3 = 14;
const int ledPin4 = 15;
const int btnPin1 = 5;
const int btnPin2 = 4;
const int btnPin3 = 9;
const int btnPin4 = 1;

BlynkTimer timer;
void checkPhysicalButton();

int led1State = LOW;
int btn1State = HIGH;

int led2State = LOW;
int btn2State = HIGH;

int led3State = LOW;
int btn3State = HIGH;

int led4State = LOW;
int btn4State = HIGH;

// Every time we connect to the cloud...
BLYNK_CONNECTED() {
  // Request the latest state from the server
  Blynk.syncVirtual(V12);
  Blynk.syncVirtual(V13);
  Blynk.syncVirtual(V14);
  Blynk.syncVirtual(V15);

  // Alternatively, you could override server state using:
  //Blynk.virtualWrite(V12, led1State);
  //Blynk.virtualWrite(V13, led2State);
  //Blynk.virtualWrite(V14, led3State);
  //Blynk.virtualWrite(V15, led4State);

}

// When App button is pushed - switch the state
BLYNK_WRITE(V12) {
  led1State = param.asInt();
  digitalWrite(ledPin1, led1State);
}
  
 BLYNK_WRITE(V13) {
  led2State = param.asInt();
  digitalWrite(ledPin2, led2State);
 }
BLYNK_WRITE(V14) {
  led3State = param.asInt();
  digitalWrite(ledPin3, led3State);
}
BLYNK_WRITE(V15) {
  led4State = param.asInt();
  digitalWrite(ledPin4, led4State);
}

void checkPhysicalButton()
{
  if (digitalRead(btnPin1) == LOW) {
    // btn1State is used to avoid sequential toggles
    if (btn1State != LOW) {

      // Toggle LED state
      led1State = !led1State;
      digitalWrite(ledPin1, led1State);

      // Update Button Widget
      Blynk.virtualWrite(V12, led1State);
    }
    btn1State = LOW;
  } else {
    btn1State = HIGH;
  }

  if (digitalRead(btnPin2) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn2State != LOW) {

      // Toggle LED state
      led2State = !led2State;
      digitalWrite(ledPin2, led2State);

      // Update Button Widget
      Blynk.virtualWrite(V13, led2State);
    }
    btn2State = LOW;
  } else {
    btn2State = HIGH;
  }

  if (digitalRead(btnPin3) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn3State != LOW) {

      // Toggle LED state
      led3State = !led3State;
      digitalWrite(ledPin3, led3State);

      // Update Button Widget
      Blynk.virtualWrite(V14, led3State);
    }
    btn3State = LOW;
  } else {
    btn3State = HIGH;
  }

  if (digitalRead(btnPin4) == LOW) {
    // btnState is used to avoid sequential toggles
    if (btn4State != LOW) {

      // Toggle LED state
      led4State = !led4State;
      digitalWrite(ledPin4, led4State);

      // Update Button Widget
      Blynk.virtualWrite(V15, led4State);
    }
    btn4State = LOW;
  } else {
    btn4State = HIGH;
  }
}

void setup()
{
  Serial.begin(115200);
  WiFiManager wifiManager;
wifiManager.autoConnect("AutoConnectAP");
Serial.println("");
 Serial.println("wifi connected...yeey :");
Serial.println("IP address:");
Blynk.begin(auth, WiFi.SSID().c_str(), WiFi.psk().c_str());
 
  // Debug console
  Serial.begin(9600);

  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);

  pinMode(ledPin1, OUTPUT);
  pinMode(btnPin1, INPUT_PULLUP);
  digitalWrite(ledPin1, led1State);
  

  pinMode(ledPin2, OUTPUT);
  pinMode(btnPin2, INPUT_PULLUP);
  digitalWrite(ledPin2, led2State);
  

  pinMode(ledPin3, OUTPUT);
  pinMode(btnPin3, INPUT_PULLUP);
  digitalWrite(ledPin3, led3State);
  

  pinMode(ledPin4, OUTPUT);
  pinMode(btnPin4, INPUT_PULLUP);
  digitalWrite(ledPin4, led4State);

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

void loop()
{
  Blynk.run();
  timer.run();
}

#17

hello you send me please this QR Code thank you


#18

2 posts were split to a new topic: Code did not show the status of the button


#19