I am writing a code for bridge communication

Need Help With My Project
1 
#define BLYNK_PRINT Serial



#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "qmppE8kZmNhF8zTuaQdi__QnmIL-Dw1u";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "nitinpa";
char pass[] = "nitinpa1";



 
         
      WidgetBridge bridge1(V1);
      WidgetBridge bridge2(V2);
      WidgetBridge bridge3(V3);
      WidgetBridge bridge4(V4);
      WidgetBridge bridge5(V5);
      WidgetBridge bridge6(V6);


void setup()
{
      bridge1.virtualWrite(analogRead(36));
bridge2.virtualWrite(analogRead(39));
bridge3.virtualWrite(analogRead(34));
bridge4.virtualWrite(analogRead(35));
bridge5.virtualWrite(digitalRead(32));
bridge6.virtualWrite(digitalRead(33));
  // Debug console
  Serial.begin(9600);

  
}

BLYNK_CONNECTED() {
     bridge1.setAuthToken("ljF4YLcyFN9P6iVeze92GsffvGwSeb2J");
}
void loop()
    {
  Blynk.run();
}
2

First of all , bridge1 is the transmitter so it’s not needed

you have to declare bridge2 to 6 they are receivers

like this

char BridgeAuth2[] = "fgfggfdggfdgdg";
char BridgeAuth3[] = "fgfggfdggfdgdg";

 Bridge2.setAuthToken(BridgeAuth2);
 Bridge3.setAuthToken(BridgeAuth3);

and so on

1 Like
3

I want to communicate between two devices is code suitable for that

4 
//before setup
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "nitinpa";
char pass[] = "nitinpa1";
char BridgeAuth2[] = "fgfggfdggfdgdg";
char BridgeAuth3[] = "fgfggfdggfdgdg";

BLYNK_CONNECTED() {
 Bridge2.setAuthToken(BridgeAuth2);
 Bridge3.setAuthToken(BridgeAuth3);
}
5

In your code there are more than 2 devices :thinking:
Do you need to have 2 ways communication ? MCU1 <—> MCU2

6

no i want to send data from one esp32 to another esp32

7

So you only need bridge2 with the Auth of the ESP32 N°2
but the code is wrong

bridge1.virtualWrite(analogRead(36));
bridge2.virtualWrite(analogRead(39));
bridge3.virtualWrite(analogRead(34));
bridge4.virtualWrite(analogRead(35));
bridge5.virtualWrite(digitalRead(32));
bridge6.virtualWrite(digitalRead(33));

you have to put analogRead into variable
and send to ESP N°2 with this
bridge2.virtualWrite(Vpin, resultA36);

8

I need to send values of multiple analog pins from one esp32 to another its one way communication

9

Can you provide me an example please

10

in the first ESP32

int A36=analogRead(36);

bridge2.virtualWrite(Vpin, A36);// Vpin is the VirtualPin you need in the second ESP32

in the second ESP32

BLYNK_WRITE(Vpin) {//receiver same pin as the 1st ESP32
 int A36= param.asInt();
}
11

ok let me do it i will be back if I face some issues thanks sir

1 Like
12

Don’t forget that analog input should be less than 3.3V

13

can i use a voltage divider for that

14

You can use resistors and make a bridge
I use that with 5V sensors

1 Like
15 
#define BLYNK_PRINT Serial



#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

int A36=analogRead(36);
int A39=analogRead(39);
int A34=analogRead(34);
int A35=analogRead(35);
int A32=analogRead(32);
int A33=analogRead(33);
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "qmppE8kZmNhF8zTuaQdi__QnmIL-Dw1u";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "nitinpa";
char pass[] = "nitinpa1";
char BridgeAuth2[] = "ljF4YLcyFN9P6iVeze92GsffvGwSeb2J";




BLYNK_CONNECTED(){
Bridge2.setAuthToken(ljF4YLcyFN9P6iVeze92GsffvGwSeb2J);
}

        
     WidgetBridge bridge1(V1);
     WidgetBridge bridge2(V2);
    


void setup()
{
bridge2.virtualWrite(V1, A36);
bridge2.virtualWrite(V2, A39);
bridge2.virtualWrite(V3, A34);
bridge2.virtualWrite(V4, A35);
bridge2.virtualWrite(V5, A32);
bridge2.virtualWrite(V6, A33);
 // Debug console
 Serial.begin(9600);

 
}



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

its the second code it is showing an error

‘Bridge2’ was not declared in this scope

16

Please edit your post (using the pencil icon at the bottom) and add triple backticks at the top and bottom of your code.
Triple backticks look like this: ```

1 Like
17

i edited it

18 
bridge2.setAuthToken(ljF4YLcyFN9P6iVeze92GsffvGwSeb2J);// <-- wrong format

bridge2.setAuthToken(BridgeAuth2); // right format

->> bridge , not Bridge

19

You forgot to connect Blynk and your code to send analogRead is wrong
You have to read analog pin with timer function and send to bridge

21

I can’t see any Bridge2 in your code
And as @PeteKnight said, you have to learn how blynk works before trying to send value with bridge
You have no connection , I don’t see any Blynk.connect();