有人可以帮我用Arduino草图来控制电机操作吗？

Question

I am making Arduino sketch to control motor operation according to water level in tank. The model is Arduino atMega 2560.

When lower button(water in tank is low) is LOW the led should become HIGH (motor will pump water) and when upper Button (water tank is filled) is HIGH led(motor) should get LOW.

This code not working:

const int lowerButtonPin = 2;
const int upperButtonPin = 3;
const int ledPin =  6;
int lowerButtonState = 0;
int upperButtonState = 0;  
/***************************setup****************************/

void setup() {  
    pinMode(ledPin, OUTPUT);  
    pinMode(lowerButtonPin, INPUT);
    pinMode(upperButtonPin, INPUT);
    digitalWrite(ledPin,LOW);
}

/**********loop****************/

void loop() {
    lowerButtonState = digitalRead(lowerButtonPin);
    if(lowerButtonState==HIGH){
        digitalWrite(ledPin,HIGH);
    } 
    upperButtonState = digitalRead(upperButtonPin);
    if(upperButtonState==HIGH){
        digitalWrite(ledPin,LOW);
    }
}

Could anyone help me out?

Answer 1

What I can tell is that when you're lower button is low, the led should become high. But here you've put lower button high, led high:

lowerButtonState = digitalRead(lowerButtonPin);

  if(lowerButtonState==HIGH){    
    digitalWrite(ledPin,HIGH); 
  }

Try this:

lowerButtonState = digitalRead(lowerButtonPin);

  if(lowerButtonState==LOW){      // If lower button is low
    digitalWrite(ledPin,HIGH);    // Set led high
  }