No matching function for call to 'BlynkStream::begin(char [33], HardwareSerial&)'

Need Help With My Project
,
1

hi there, i amcompilng following code and having error ===> “no matching function for call to 'BlynkStream::begin(char [33], HardwareSerial&)”

#include <BlynkSimpleStream.h>
int sensorPin = A0;    
int ledPin = 9;     
int sensorValue = 1;
 
 char auth[] = "SZN5JK5GVRNDfFOVo4T0UmPRmX76Ar";
 
 void setup()
 {
   pinMode(ledPin, OUTPUT);  
   Serial.begin(9600);
   Blynk.begin(auth, Serial);
   pinMode(11, OUTPUT);
   pinMode(12, OUTPUT);
   pinMode(13, OUTPUT);
 }
 BLYNK_WRITE(V1) //Button Widget is writing to pin V1
{
  int pinData = param.asInt(); 
  if(pinData==1){
    digitalWrite(11, HIGH);
  }else{
    digitalWrite(11, LOW);
  }
}
 void loop()
 {
  sensorValue = analogRead(sensorPin);
  // turn the ledPin on
  if (sensorValue<=450)
  {
    digitalWrite(ledPin, HIGH);
  // stop the program for <sensorValue> milliseconds:
  }
  else
  {
    digitalWrite(ledPin, LOW);
  // stop the program for for <sensorValue> milliseconds:
  }
   Blynk.run();
}
2

Please edit your post and add triple backticks ( ``` ) before and after your whole sketch.

3

Done.

4

Now you should provide more details like blynk IOT or legacy, library version, hardware type etc…

5

It’s blynk legacy and the latest version of library, hardware is esp32.

6

I’d always recommend using library version 0.6.1 with Legacy.

The BlynkSimpleStream library is intended for use when the device connects via the serial port, with a PC that’s running the Blynk connection script.
I would imagine that you’d be using the ESP32’s WiFi capability rather than a serial connection?

Pete.

1 Like
7

downgrading the library to version 0.6.1 should fix this issue.
also, you should read this

1 Like
8

Try changing the order inside the Blynk.begin command,

From -----> Blynk.begin(auth, Serial);

To ----------> Blynk.begin(Serial, auth);

I faced the same issue and once I changed the order it worked out for me.