Arduino 即使digitalRead处于低位，LED也会保持点亮

我只是在创建一个简单的basic程序，但我不知道出了什么问题

我设置了三个引脚作为输出，三个引脚作为输入。当这三个引脚digitalRead==高时，它们会将LED设置为高，但我的LED始终保持高

这是我的Arduino代码：

int LED_Low = 4; // Red LED
int LED_Avg = 3; // Yellow LED
int LED_High = 2; // Green Led

int WaterLow = 7;
int WaterAvg = 8;
int WaterHigh = 9;


void setup() {
  // Put your setup code here, to run once:
  pinMode(LED_Low,  OUTPUT);
  pinMode(LED_Avg,  OUTPUT);
  pinMode(LED_High, OUTPUT);

  pinMode(WaterLow,  INPUT);
  pinMode(WaterAvg,  INPUT);
  pinMode(WaterHigh, INPUT);
}

void check(){
    if(digitalRead(WaterLow) == HIGH){ // If Water level is low
        digitalWrite(ledLow, HIGH); // Turn on red LED indication water level is low
    }
    else{
        digitalWrite(ledLow, LOW);
    }
    if(digitalRead(WaterAvg) == HIGH){ // If water level is medium
        digitalWrite(ledAvg, HIGH); // Turn on yellow LED indicating water level is average
    }
    else{
        digitalWrite(ledAvg, LOW);
    }
    if(digitalRead(WaterHigh) == HIGH){ //
        digitalWrite(ledHigh, HIGH); //
    }
    else{
        digitalWrite(ledHigh, LOW);
    }
}

void loop() {
    // Put your main code here, to run repeatedly:
    check();
}

---

在上图中，我已将引脚2、3和4上的led与1.5千欧姆电阻器相连，引脚7、8和9上有三根导线，它们将接收来自5伏引脚的输入并打开led。因此，5伏引脚连接到电源总线的正极端子，并串联9.1*2个电阻器，然后该导线连接到引脚2、3和4。

我发现了问题。我的代码还可以。这是我的电路

---

我声明接收输入的引脚未接地。

您可以通过两个案例来实现这一点

定义延迟

if (digitalRead(WaterLow) == HIGH) // If Water level is low
{
    digitalWrite(ledLow, HIGH); // Turn red LED indication water level is low
    delay(2000);
}
else
{
    digitalWrite(ledLow, LOW);
}

创造这样的条件

int stateled = LOW;
int previous = LOW;
long time = 0;
long debounce = 200;

void loop()
{
    stateButton = digitalRead(WaterLow);
    if (stateButton == HIGH && previous == LOW && millis() - time > debounce)
    {
        if(stateLED == HIGH)
        {
            stateLED = LOW;
        }
        else
        {
            stateLED = HIGH;
        }
        time = millis();
    }
    digitalWrite(ledlow, stateLED);
    previous == stateButton;
}

---

你能贴一张你的Arduino的照片吗？我用图片和描述更新了我的问题