Arduino

//Analog Temperature Sensor
const int digitalPin = 7; //Analog Temperature Sensor pin D0 to pin7
int analogPin = A0; //Analog Temperature Sensor pin A0 to pin A0
const int ledPin = 13; //bulit-in LED light

//variables will change:
boolean Dstate = 0;  //variable for readind status of D0
int Astate = 0;  //variable for reading status of A0

void setup()
{
  pinMode(ledPin, OUTPUT);
  pinMode(digitalPin, INPUT);
  Serial.begin(9600);
}

void loop()
{
  Astate = analogRead(analogPin);
  Dstate = digitalRead(digitalPin);
  Serial.print("D0:");
  Serial.println(Dstate);
  Serial.print("A0:");
  Serial.println(Astate);
  // check if the pushbutton is pressed.
  //if it is, the buttonaState is HIGH:
  if (Dstate == HIGH) 
  {
    digitalWrite(ledPin, HIGH); //turn on
  }
  else{
    digitalWrite(ledPin, LOW); //turn off
  }
  delay(1000);
}

树莓派

C

#include <stdio.h>
#include <wiringPi.h>
#include <pcf8591.h>
#include <math.h>
#define  PCF  120
#define  D0pin  0

void Print(int x)
{
    switch(x)
    {
        case 0:
                printf("\n************\n");
                printf(  "* Too Hot! *\n");
                printf(  "************\n\n");
                break;
        case 1:
                printf("\n***********\n");
                printf(  "* Better~ *\n");
                printf(  "***********\n\n");
                break;
        default:
                printf("\n**********************\n");
                printf(  "* Print value error. *\n");
                printf(  "**********************\n\n");
                break;
    }
}

int main()
{
    unsigned char analogVal;
    double Vr, Rt, temp;
    int tmp, status;
    
    if (wiringPiSetup() == -1){
        printf("setup wiringPi failed !");
        return 1;
    }
    // Setup pcf8591 on base 120, and address 0x48
    pcf8591Setup(PCF, 0x48);
    pinMode(D0pin, INPUT);
    status = 0;
    while(1) //loop forever
    {
        printf("loop");
        analogVal = analogRead(PCF + 0);
        Vr = 5 * (double)(analogVal) / 255;
        Rt = 10000 * (double)(Vr) / (5 - (double)(Vr));
        temp = 1 / (((log(Rt/10000)) / 3950) + (1 / (273.15 + 25)));
        temp = temp - 273.15;
        printf("Current temperature: %1f\n", temp);

        //For a threshold, uncomment one of the code for
        //which module you use.DONOT UNCOMMENT BOTH!
        //--------------------------------------------
        //1. For Analog Temperature module(with D0)
        tmp = digitalRead(D0pin);

        //2. For Thermister module(with sig pin)
        if (temp > 33) tmp = 0;
        else if (temp < 31) tmp = 1;
        //----------------------------------------------
        if (tmp != status)
        {
                Print(tmp);
                status = tmp;
        }
        delay(200);
    }
    return 0;
}

Python

#!/usr/bin/env python
import PCF8591 as ADC
import RPi.GPIO as GPIO
import time
import math
D0 = 17
GPIO.setmode(GPIO.BCM)

def setup():
    ADC.setup(0x48)
    GPIO.setup(D0, GPIO.IN)

def Print(x):
    if x == 1:
        print('')
        print('***********')
        print('* Better~ *')
        print('***********')
        print('')
    if x == 0:
        print('')
        print('************')
        print('* Too Hot! *')
        print('************')
        print('')

def loop():
    status = 1
    tmp = 1
    while True:
        analogVal = ADC.read(0)
        Vr = 5 * float(analogVal) / 255
        Rt = 10000 * Vr / (5 - Vr)
        temp = 1/((math.log(Rt / 10000) / 3950) + (1 / (273.15 + 25)))
        temp = temp - 273.15
        print('Temperature = {}C'.format(temp))
        # For a thredshold, uncomment one of code for 
        # which module you use, DONOT UNCOMMENT BOTH!
        ####################################################
        # 1. For Analog Temperature module(with D0)
        # tmp = GPIO.input(D0)
        #
        # 2. For Thermister module(with sig pin)
        if temp > 33:
            tmp = 0
        elif temp < 31:
            tmp = 1
        ####################################################

        if tmp != status:
            Print(tmp)
            status = tmp

        time.sleep(0.2)


if __name__ == '__main__':
    try:
        setup()
        loop()
    except KeyboardInterrupt:
        pass