Arduino循环混乱

Question

I'm creating an auto watering system for some plants. I am using a motor to control them, and soil sensors to tell when they need water. But I'm having trouble both understanding how I should be approaching this and secondly why my code isn't working. My problem is that the while loop is never initialized, and so the motor never stops I can tell this by my serial monitor.

      if(sensorVal1 <= thresholdDown1){
Serial.println("Plant Group 1 is Dry!");
Serial.println(sensorVal1);
Serial.println("Watering");
digitalWrite(in1, LOW); //LEFT
digitalWrite(in2, HIGH);
analogWrite(enA, 255);

delay(6250);


startTime = millis();
while(sensorVal1 <= thresholdDown1){
  Serial.println("Stopping");
    digitalWrite(in1, LOW);
digitalWrite(in2, LOW);

      if(sensorVal1 >= thresholdUp1){
     break;
   }
}



      totalTime = millis() - startTime;
      digitalWrite(in1, HIGH); //RIGHT
      digitalWrite(in2, LOW);
      delay(500);
      digitalWrite(in1, LOW); //OFF
      digitalWrite(in2, LOW);
      delay(totalTime);
      digitalWrite(in1, HIGH);
      digitalWrite(in2, LOW);
      delay(500);
      digitalWrite(in1, LOW);
      digitalWrite(in2, LOW);
      delay(totalTime);    
      digitalWrite(in1, HIGH);
      digitalWrite(in2, LOW);
      delay(3000);
      digitalWrite(in1, LOW);
      digitalWrite(in2, LOW);


      }

Answer 1

Here is a very simple logic you can try :

if( sensorVal <= treshold ) {
  Serial.println("Watering");
  waterOn();
} else {
  Serial.println("NOT watering");
  waterOff();
}