Arduino 串口输出LM35温度

#include "stdlib.h"

float temp = 0.0;

float maxtemp = 0.0;

float mintemp =100.0;

// the setup routine runs once when you press reset:

void setup() {

Serial.begin();

Serial.println(F("reading temperature begin. \n"));

}

// the loop routine runs over and over again forever:

void loop() {

  static unsigned long sensortStamp = ;

  if(millis() - sensortStamp > ){

    sensortStamp = millis();

    // read the LM35 sensor value and convert to the degrees every 100ms.

    int reading = analogRead(); //把LM35的输出端连接到了A0，所以这里是analogRead(0)

    temp = reading *0.0048828125*;

    if(temp >= maxtemp)

      maxtemp = temp;

    if(temp <= mintemp)

       mintemp = temp;

    Serial.print(F("Real Time Temp: "));

    Serial.print(temp);

    Serial.print(F(" Max Temp: "));

    Serial.print(maxtemp);

    Serial.print(F("  Min Temp: "));

    Serial.println(mintemp);

  }

}