Wire.h i2c slave not working, STM32F103 is freezing..

[gopalreddylakki]

Discussed in https://github.com/orgs/stm32duino/discussions/2279

^{Originally posted by gopalreddylakki February 19, 2024}

//slave
void requestEvent()
{
  Wire.write("hello\n");  // respond with message of 6 bytes
                          // as expected by master
}

form the Arduino required 15 bytes, in the salve only having 6 bytes. in slave (stm32f103) after sending 6 bytes it's not the end transaction, it's in freezing.

but I check with another board manager stm32duino . it's working fine.

can check it and give me the solution

Slave program (STM32F103)

#include <Wire.h>

#define I2C_ADDR  0x09

void setup()
{
  Wire.begin(I2C_ADDR);         // join i2c bus with address #4
  Wire.onRequest(requestEvent); // register event
  Wire.onReceive(receiveEvent); // register event
  Serial.begin(115200);           // start serial for output
    pinMode(PC13,OUTPUT);
}

void loop()
{
  //empty loop
    digitalWrite(PC13,HIGH);
  delay(200);
  digitalWrite(PC13,LOW);
  delay(200);
}

// function that executes whenever data is received from master
// this function is registered as an event, see setup()
void receiveEvent(int howMany)
{
  while(1 < Wire.available()) // loop through all but the last
  {
    char c = Wire.read();     // receive byte as a character
    Serial.print(c);          // print the character
  }
 // int x = Wire.read();        // receive byte as an integer
  //Serial.println(x);          // print the integer
}

// function that executes whenever data is requested by master
// this function is registered as an event, see setup()
void requestEvent()
{
  Wire.write("hello\n");  // respond with message of 6 bytes
                          // as expected by master
}

master program (ardunio nano )

#include "Wire.h"
#define bl03_address 0x09

void setup()
{
 Wire.begin();
 Serial.begin(115200);
 
 
}
void loop()
{
  //getvoltage();
 //gettemperature();

	
  Wire.beginTransmission(bl03_address);
	Wire.write(0x20);
	Wire.endTransmission();
	Wire.requestFrom(bl03_address,15,true);
	char registerValue = Wire.read();
  char registerValue1 = Wire.read();
	Wire.endTransmission();
  Serial.println(registerValue,HEX);
 Serial.println(registerValue1,HEX);

 delay(500);
}

[fpistm]

Please do not duplicate entry.
Ii is already a discussion and as said I'm not able to reproduce.