I2C on ESP32: Scan & Read

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#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin();
  Serial.println("Scanning...");
  for (byte a = 1; a < 127; a++) {
    Wire.beginTransmission(a);
    if (Wire.endTransmission() == 0) {
      Serial.printf("Found 0x%02X\n", a);
    }
  }
}
void loop() {}