#include <Wire.h>

void setup() {
  Wire.begin(PB7, PB6);  // Use correct pins for Blue Pill
  Serial.begin(115200);
  Serial.println("\nI2C Scanner");
  
  for (byte address = 1; address < 127; address++) {
    Wire.beginTransmission(address);
    if (Wire.endTransmission() == 0) {
      Serial.print("Found I2C device at 0x");
      Serial.println(address, HEX);
      delay(10);
    }
  }
  Serial.println("Scan is complete");
}

void loop() {}