NodeMcu and physical buttons!

Need Help With My Project
1

Tell me please ! It is necessary to control a single output with physical buttons and applications? if the code is correct or it is necessary to correct?

#define BLYNK_DEBUG
#define BLYNK_PRINT Serial 
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
char auth[] = "YourAuthToken";
void checkPhysicalButton();
const int butdoorbell = 4;
const int doorbell = 13;
SimpleTimer timer;
int ledState = LOW;
void setup()
{
  Serial.begin(115200);
   Blynk.begin(auth, "ssid", "pass");
  digitalWrite(doorbell, ledState);
   pinMode(doorbell, OUTPUT);
   pinMode(butdoorbell, INPUT);
   timer.setInterval(300L, checkPhysicalButton);
}
BLYNK_CONNECTED()
 {
  Blynk.syncAll();
  }
   BLYNK_WRITE(V10){
     ledState = param.asInt();
   digitalWrite(doorbell, ledState);
   }
   void checkPhysicalButton()
   {
   if (digitalRead(butdoorbell) == HIGH){
    digitalWrite(doorbell, HIGH);
    Blynk.virtualWrite(V10, HIGH);
   }
  if (digitalRead(butdoorbell) == LOW){
     digitalWrite(doorbell, ledState);
     Blynk.virtualWrite(V10, ledState);
  }
  } 
     void loop()
     {
     Blynk.run();
     timer.run();
     }
2

looks like it could work, what is the problem?

3

Everything is working ! I’m new to Arduino, I thought to experts looked and said, if something goes wrong!

4

No man, this looks pretty much ok :slight_smile:

You got the concept figured out. Very nice cat too! Love it!

5

@AND, In checkPhysicalButton (which is called rather frequently), it would be better to store previous state, and send an updated value only if it changes. It would conserve lot’s of traffic.

6

Please tell me how to do it!

7

something like…

   int lastStatus = HIGH;
   void checkPhysicalButton()
   {
     int currentStatus = digitalRead(butdoorbell);
     if (currentStatus != lastStatus) {
       if (currentStatus == HIGH){
         digitalWrite(doorbell, HIGH);
         Blynk.virtualWrite(V10, HIGH);
       } else {
         digitalWrite(doorbell, ledState);
         Blynk.virtualWrite(V10, ledState);
       }
       lastStatus = currentStatus;
     }
  }
1 Like
8

Thank you so much for helping me!!

9

A post was split to a new topic: Problem using physical buttons

10