Blynk timer no luck

sladecolin · February 22, 2018, 2:54pm

First thanks for any help. I have looked at the examples but they do not really work for me. I have tried to set a timer but it appears not to have been set up properly.

  Download latest Blynk library here:
    https://github.com/blynkkk/blynk-library/releases/latest

  Blynk is a platform with iOS and Android apps to control
  Arduino, Raspberry Pi and the likes over the Internet.
  You can easily build graphic interfaces for all your
  projects by simply dragging and dropping widgets.

    Downloads, docs, tutorials: http://www.blynk.cc
    Sketch generator:           http://examples.blynk.cc
    Blynk community:            http://community.blynk.cc
    Follow us:                  http://www.fb.com/blynkapp
                                http://twitter.com/blynk_app

  Blynk library is licensed under MIT license
  This example code is in public domain.

 *************************************************************

  Output any data on LCD widget!

  App project setup:
    LCD widget, switch to ADVANCED mode, select pin V1
 *************************************************************/

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


#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#define TRIGGERPIN D1
#define ECHOPIN    D2
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "c48e77b790e64b05adf1ee77fb4dbb40";

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

WidgetLCD lcd(V1);

BlynkTimer timer;

// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void myTimerEvent()
{
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V5, millis() / 3000); //was 1000
}

void setup()
{
  // Debug console
  Serial.begin(9600);
pinMode(TRIGGERPIN, OUTPUT);
  pinMode(ECHOPIN, INPUT);
  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);

  lcd.clear(); //Use it to clear the LCD Widget
  lcd.print(0, 0, "Distance in cm"); // use: (position X: 0-15, position Y: 0-1, "Message you want to print")
  // Please use timed events when LCD printintg in void loop to avoid sending too many commands
  // It will cause a FLOOD Error, and connection will be dropped

timer.setInterval(5000L, myTimerEvent);
}


void loop()
{
  void mytimerEvent()  ;{
  lcd.print(0, 0, "Sump depth in cm"); // use: (position X: 0-15, position Y: 0-1, "Message you want to print")
  long duration, distance;
  digitalWrite(TRIGGERPIN, LOW);  
  delayMicroseconds(6); 
  
  digitalWrite(TRIGGERPIN, HIGH);
  delayMicroseconds(14);
  
  digitalWrite(TRIGGERPIN, LOW);
  duration = pulseIn(ECHOPIN, HIGH);
  distance = 68-(duration/2) / 29.1;
  Serial.print(distance);
  Serial.println("Cm");
  lcd.print(7, 1, distance);
  Blynk.run();
  }
timer.run(); // Initiates BlynkTimer
  

}


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```cpp

void loop()

mohan_sundaram · February 22, 2018, 3:26pm

@sladecolin Am a newbie myself to both c and blynk.

You’ve declared mytimerEvent() in loop(). Why? Best to keep loop() simple. Just have blynk.run(); timer.run(); in loop(). Handle everything else outside either in setup or defined routines that are invoked by timer in the setup().

Move the set of statements that print to lcd as a call say write_sump_depth() {…} . Setup this routine to be called by the timer e.g timer.setInterval(1000L, write_sump_depth); in setup().

As @Costas and @Gunner keep saying, keep the loop simple and to the bare minimum.

sladecolin · February 22, 2018, 4:49pm

Thanks I am definitely missing something. Not yet ready to give up…, but…

Can someone post a sample script that is fully functioning so I can see how timer works. Just trying to get my head is the right space.

Am I the only one that is having issues with tutorials or samples that demonstrate a concept. ?

Gunner · February 22, 2018, 5:00pm

As stated in the Blynk Documentation, BlynkTimer is based on SimpleTimer which is also well documented here

https://playground.arduino.cc/Code/SimpleTimer#Functions

And in those same Blynk doc files there is a link to a simple example… (also found in the Sketch Builder under Push Data)

github.com

blynkkk/blynk-library/blob/master/examples/GettingStarted/PushData/PushData.ino#L30


      
          
           NOTE:
           BlynkTimer provides SimpleTimer functionality:
             http://playground.arduino.cc/Code/SimpleTimer
          
           App dashboard setup:
             Value Display widget attached to Virtual Pin V5
          *************************************************************/
          
          /* Comment this out to disable prints and save space */
          #define BLYNK_PRINT Serial
          
          /* Fill in information from Blynk Device Info here */
          //#define BLYNK_TEMPLATE_ID           "TMPxxxxxx"
          //#define BLYNK_TEMPLATE_NAME         "Device"
          //#define BLYNK_AUTH_TOKEN            "YourAuthToken"
          
          
          #include <SPI.h>
          #include <Ethernet.h>
          #include <BlynkSimpleEthernet.h>

In you sketch, you assign/declare the timer…

BlynkTimer timer;

In your setup() you assign one or more timers…

timer.setInterval(1000L, myTimerEvent);

And each timer can call a function or “loop()” when the timer indicates…

void myTimerEvent()
{
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V5, millis() / 1000);
}

sladecolin · February 22, 2018, 5:04pm

Thanks
So it I run this script what will happen? or does more needed to be added.

Gunner I appreciate the responses,

Gunner · February 22, 2018, 5:07pm

It displays the up-time in seconds on a Display Widget set for virtual pin 5

Only if you want to do more than watch the time fly by

sladecolin · February 22, 2018, 6:54pm

Thanks
for now quite happy to watch the time fly by. Added 2nd timer and it works, here is code for future users.

/*************************************************************
  Download latest Blynk library here:
    https://github.com/blynkkk/blynk-library/releases/latest

  Blynk is a platform with iOS and Android apps to control
  Arduino, Raspberry Pi and the likes over the Internet.
  You can easily build graphic interfaces for all your
  projects by simply dragging and dropping widgets.

    Downloads, docs, tutorials: http://www.blynk.cc
    Sketch generator:           http://examples.blynk.cc
    Blynk community:            http://community.blynk.cc
    Follow us:                  http://www.fb.com/blynkapp
                                http://twitter.com/blynk_app

  Blynk library is licensed under MIT license
  This example code is in public domain.

 *************************************************************

  This example shows how value can be pushed from Arduino to
  the Blynk App.

  NOTE:
  BlynkTimer provides SimpleTimer functionality:
    http://playground.arduino.cc/Code/SimpleTimer

  App project setup:
    Value Display widget attached to Virtual Pin V5
 *************************************************************/

/* Comment this out to disable prints and save space */
#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[] = "c22bf1d27d074a289c633996618f3239";

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

BlynkTimer timer;

// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void myTimerEvent()
{
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V5, millis() / 1000);
}
void myTimerEvent2()
{
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V6, millis() / 1000);
}

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);

  // Setup a function to be called every second
  timer.setInterval(5000L, myTimerEvent);
   timer.setInterval(1000L, myTimerEvent2);
}

void loop()
{
  Blynk.run();
  timer.run(); // Initiates BlynkTimer
}

Gunner · February 22, 2018, 6:59pm

At least change the 5 second display one to display something different Try the RSSI signal strength…

void myTimerEvent()
{
  Blynk.virtualWrite(V5, WiFi.RSSI());
}

sladecolin · February 22, 2018, 7:15pm

Nice my options are slowly growing!

Gunner · February 22, 2018, 7:18pm

Soon, you could have one with a few more displays, etc

Dharmendra_Vishwakar · December 15, 2019, 2:46pm

Its not working for me

PeteKnight · December 15, 2019, 2:52pm

@Dharmendra_Vishwakar this is a two year old topic and @sladecolin hasn’t been seen on the forum since 28th February last year.

even if is was a current topic, simply saying

isn’t very helpful. I’s a bit like posting on an automotive forum and saying “my car won’t start”.

If you share information about exactly what hardware you are trying to use, what steps you’ve taken, what results you get when you compile and upload the code and what you see in the serial monitor then forum members may be able to assist.

Pete.