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
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 
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
// 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();}
}// 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.
}
}You know the use of this function?
http://docs.blynk.cc/#blynk-firmware-blynktimer-blynk_writevpin
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
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 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)
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.
use some serial.print to check the values sent and received… i’m doing this on my mind without arduino ide XD
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?
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
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
I’ve tried to use to use the bridge between 2 sonoff devices (esp8266 based). After a while both devices just stop communication.