Blink push notification does not work does not get message blockage alert when the value is less than 10

Solved
1 
 #define BLYNK_PRINT Serial
#include <BlynkSimpleEsp8266.h>
#include <ESP8266WiFi.h>
const int trigPin1 = D3;
const int echoPin1 = D2;

char auth[]="97VFrfG0MUtLVpIzex_WwG09YkwDsH2Y";
char ssid[] = "DESKTOPDSTSEED";
char pass[] = "India1234";
int duration1,distance1;

void setup()
{
  pinMode(trigPin1, OUTPUT);
  pinMode(echoPin1, INPUT);

  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
}
void loop()
{
 
  digitalWrite(trigPin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1, LOW);
  duration1 = pulseIn(echoPin1, HIGH);
  distance1 = duration1 * 0.034 / 2;

   Blynk.virtualWrite(V1,distance1);
         if(distance1<10)
   {
    Blynk.notify("Blockage Alert!");

   }
    Blynk.run();

   }
2

@vijaysiva please edit your post, using the pencil icon at the bottom, and add triple backticks at the beginning and end of your code so that it displays correctly.
Triple backticks look like this:
```

Pete.

3

updated with triple back ticks at beginning and end of the code
Thanks for your response

4

First of all, you should read this…

https://docs.blynk.io/en/legacy-platform/legacy-articles/keep-your-void-loop-clean

You’ll then realise that you are breaking one of the golden rules of Blynk by having a Blynk.virtualWrite in your void loop.

You also have no mechanism, such as a flag variable, to prevent multiple notifications being sent for the same error situation.

Are you using Blynk Legacy, or the new Blynk IoT ?

Pete.

1 Like
5

Thanks for your response. I am using blynk legacy. I will try to fix the issue as per your suggestion

6 
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

#define  trig  D3
#define  echo  D2

long duration;
int distance;

// You should get Auth Token in the Blynk App.


char auth[]="97VFrfG0MUtLVpIzex_WwG09YkwDsH2Y";
char ssid[] = "vijayhathway";
char pass[] = "vijay@1234";

BlynkTimer timer;

void setup()
{
  // Debug console
  pinMode(trig, OUTPUT);  // Sets the trigPin as an Output
  pinMode(echo, INPUT);   // Sets the echoPin as an Inpu
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);

 timer.setInterval(1000L, sendSensor);
}
void sendSensor()
{
  digitalWrite(trig, LOW);   // Makes trigPin low
  delayMicroseconds(2);       // 2 micro second delay

  digitalWrite(trig, HIGH);  // tigPin high
  delayMicroseconds(10);      // trigPin high for 10 micro seconds
  digitalWrite(trig, LOW);   // trigPin low

  duration = pulseIn(echo, HIGH);   //Read echo pin, time in microseconds
  distance = duration * 0.034 / 2;   //Calculating actual/real distance

  Serial.print("Distance = ");        //Output distance on arduino serial monitor
  Serial.println(distance);

  if(distance <10)
  {
    
    Blynk.notify("Blockage alert");
  }
  Blynk.virtualWrite(V1, distance);
  delay(1000);                        //Pause for 3 seconds and start measuring distance again
}

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

I have modified the code as per your suggestion but i still did not get the push notification. I am using blynk legacy. please let me know whether push notification service is no more available with blynk legacy version. Thanks once again

7

Notifications still work with Blynk Legacy, at least for the time being.

Have you added the notification widget to your app project?

Pete.

8

Thanks for your support pete the problem has been solved