LM35線性溫度感測模組

描述

技術規格

1.訊號傳輸型式: 類比 (Analog)

2.電壓範圍：3.0V ~ 5.5V。

3.測溫範圍：-40℃到150℃

4.敏感度：10mV/℃(輸出電壓與溫度成正比)

商品內容

• LM35線性溫度感測模組                  1個
• RJ11 6P4C  25cm 信號線                 1條

 

程式範例

 在此範例配合S4A IO Board 做簡單實驗, 在超過30℃時由綠燈切換成紅燈警示

int analogPin = A3;//LM35接在A3

int readValue = 0;

float temperature = 0;

float temperatureF = 0;

int times = 0;

float Total_temperature = 0;

void setup()

{

    Serial.begin(9600);//設置baud rate

    pinMode (10, OUTPUT);//紅色LED接在d10

    pinMode (11, OUTPUT);//綠色LED接在d11

}

void loop()

{

  readValue = analogRead(analogPin);

  //Serial.println(readValue);

  temperature = (readValue * 0.0049);

  temperature = temperature * 100;

  temperatureF = (temperature * 1.8) + 32;

  Total_temperature = Total_temperature + temperature;

  times = times + 1;

  if(times == 10)

  {

    temperature = Total_temperature / times;

    Serial.print(“Temperature: “);

    Serial.print(temperature);

    Serial.print(“C “);

    Serial.print(temperatureF);

    Serial.println(“F”);

    if (temperature <= 30)

      {

        digitalWrite (10, LOW);

        digitalWrite (11, HIGH);

      }

      if (temperature > 30)

      {

        digitalWrite (10, HIGH);

        digitalWrite (11, LOW);

      }

      times = 0;

      Total_temperature = 0;

  }

    delay(100);

}