void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, STM32!");
  pinMode(A1, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  uint8_t memory = digitalRead(A1);
  if (memory)
    Serial.println("ok");
  else 
    Serial.println("yes");
  
  delay(1000); // this speeds up the simulation
}