Can i share data between 2 Wemos D1 R1 using blynk

[trystan4861]

you used the blynk_write(v10) function?

Blynk.syncVirtual(V10) calls the execution of BLYNK_WRITE(V10)… if you don’t use that function…

And if you used Blynk.virtualWrite(V50,current1); … you must use Blynk.syncVirtual(V50) and BLYNK_WRITE(V50) in wemos B

[Muhammad_Umair]

Blynk.syncVirtual(V10) calls the execution of BLYNK_WRITE(V10)

where should i write the wemos a or b.

p.s thanks for the support you are a life saver

[trystan4861]

Wemos A reads the potentiometer value… send it to V10 for example and at wemos B use syncVirtual(10) at loop function and use BLYNK_WRITE(V10) to get the potentiometer value sent from the wemos A

[Muhammad_Umair]

// WEMOS A //

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



int current1;

char auth[] = "673cd76cc5044a49a6cb65fb595e4895";
char ssid[] = "PTCL-BB";
char pass[] = "3553C8A8";


void setup()
{
  
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
  pinMode(A0, INPUT);
  pinMode(D5,OUTPUT);

}



void switchstate(){
current1 = analogRead(A0);
Blynk.virtualWrite(V10,current1);
}


void relaystate(){
BLYNK_WRITE(D5) ;
digitalWrite(D5, HIGH);
}

void relaystate1(){
BLYNK_WRITE(D5) ;
digitalWrite(D5, LOW); 
}



void loop(){



  Blynk.run();
  switchstate();

  if (current1 > 500){
  relaystate();}
  
  if (current1 < 500){
  relaystate1();}
  
  
}

[Muhammad_Umair]

// WEMOS B //

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

char auth[] = "673cd76cc5044a49a6cb65fb595e4895";
char ssid[] = "PTCL-BB";
char pass[] = "3553C8A8";


void setup()
{
  
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
  pinMode(D5, OUTPUT);

}



void loop(){

Blynk.run();
 
Blynk.syncVirtual(V10); 

}


 
BLYNK_WRITE(V10){
 
}



 BLYNK_WRITE(D5) {
    
 int pinValue = param.asInt(); // Assigning incoming value from pin V3 to a variable
 if (V10 > 500) {
    digitalWrite(D5, HIGH); // Turn LED on.
  } else {
    digitalWrite(D5, LOW); // Turn LED off.
 }
}

[Muhammad_Umair]

Is this ok now?

[trystan4861]

You know the use of this function?

BLYNK_WRITE(D5) ;

http://docs.blynk.cc/#blynk-firmware-blynktimer-blynk_writevpin

[Muhammad_Umair]

yes i am trying to make the led on wemos b high.

it is working on wemos A .
when the pot value goes high it turns the on board led on

but it is not working on Wemos B

[trystan4861]

Wemos A

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

int PotValue=-1;
char auth[] = "673cd76cc5044a49a6cb65fb595e4895";
char ssid[] = "PTCL-BB";
char pass[] = "3553C8A8";


void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  pinMode(A0, INPUT);
  pinMode(D5,OUTPUT);
}
void SwitchState()
{
  if (PotValue!=analogRead(A0))
  {
    PotValue=analogRead(A0);
    Blynk.virtualWrite(V10,PotValue);
    digitalWrite(D5, PotValue> 500); //HIGH==TRUE==1
  }

}


void loop()
{

  Blynk.run();
  SwitchState();
}

Wemos B

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

char auth[] = "673cd76cc5044a49a6cb65fb595e4895";
char ssid[] = "PTCL-BB";
char pass[] = "3553C8A8";
BLYNK_WRITE(V10)
{
  int pinValue = param.asInt();
  digitalWrite(D5,pinValue > 500);
}
void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  pinMode(D5, OUTPUT);
}

void loop()
{
  Blynk.run();
  Blynk.syncVirtual(V10); 
}

[Muhammad_Umair]

Wemos A Led is turning On / Off But Wemos B Still not working

[trystan4861]

Check this… i make a mistake before

BLYNK_WRITE(V10)
{
digitalWrite(D5,param.asInt()>500);
}

[Gunner]

@Muhammad_Umair Here is a Bridge option example.

And yes, each device has its own AUTH code as that is the recommended way of running multiple devices, even if in the same project (although then I see no reason to use Bridge… just share data via code and variables and/or vPins)

C++ Blynk - Code Examples for Basic Tasks (Work in Progress)

#11 - The simple, but mystifyingly complex, Bridge The Bridge is meant to allow totally separate projects to share data, and/or control things between themselves. You can also have just one project with multiple devices, but have any of the 1st device’s Blynk functions triggered directly by Bridge code in the 2nd device… bypassing the App. As long as the Auth tokens were generated on the same server, then this can even share between different accounts… I think? Basicly Blynk Bridg…

[Nova]

I have two wemos d1’s connecting via bridge. I use two different authorisation tokens which is pretty much how the blynk sketch does it. Give it a try. Logically if both wemos’s are using the same auth code perhaps that is causing the problem.

[Muhammad_Umair]

BLYNK_WRITE(V10)

{

int pinValue = param.asInt();

digitalWrite(D5,pinValue > 500);

}

Wemos b led now high all the time

[trystan4861]

use some serial.print to check the values sent and received… i’m doing this on my mind without arduino ide XD

[Muhammad_Umair]

Wemos A is sending the Data value to pin 10 i checked in blynk app it is recieveing value but not sure if Wemos b is getting the data correctly

i have Wemos A & B on the same token it that a problem?

[trystan4861]

i have Wemos A & B on the same token it that a problem?

I told you to use the bridge for a reason, but as you insisted on using the same token for both …I wrote these codes

[Muhammad_Umair]

it Started Working MAN.

YOU ARE THE BEST MAN!!!
THANKS ALOT

[Muhammad_Umair]

i wanted to use bridge but it seems a little complicated and i am not as good programmer as you are man.

thanks alot again. with a simple serial.print statement it started working on wemos b too

[koaiwi]

I’ve tried to use to use the bridge between 2 sonoff devices (esp8266 based). After a while both devices just stop communication.