void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(15, OUTPUT);
  Serial.println("ESP32_DigitalWrite");
}

void loop() {
 Serial.println("GPI015_HIHT");
 digitalWrite(15, HIGH);
 delay(1000);

 Serial.println("GPT015_LOW");
 digitalWrite(15, LOW);
 delay(1000);
}