Arduino

/*****************************
 * name:Touch Switch
 * function:
 * ***********************************/
 const int SensorPin = 7;
 const int ledPin = 13;
 int SensorState = 0;

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

 void loop()
 {
  SensorState = digitalRead(SensorPin);
  Serial.println(SensorState);
  if (SensorState == HIGH)
  {
    digitalWrite(ledPin, LOW); //turn off
  }
  else
  {
    digitalWrite(ledPin, HIGH); //turn on
  }
 }

树莓派

C

#include <wiringPi.h>
#include <stdio.h>

#define TouchPin  0
#define Gpin      1
#define Rpin      2

int tmp = 0;

void LED(int color)
{
    pinMode(Gpin, OUTPUT);
    pinMode(Rpin, OUTPUT);
    if (color == 0)
    {
        digitalWrite(Rpin, HIGH);
        digitalWrite(Gpin, LOW);
    }
    else if (color == 1)
    {
        digitalWrite(Rpin, LOW);
        digitalWrite(Gpin, HIGH);
    }
    else
    {
        printf("LED ERROR");
    }
}

void Print(int x)
{
    if (x != tmp){
        if (x == 0)
            printf("...ON\n");
        if (x == 1)
            printf("...OFF\n");
    tmp = x;
    }
}

int main(void)
{
    if (wiringPiSetup() == -1){
        printf("setup wiringPi failed !\n");
        return 1;
    }

    pinMode(TouchPin, INPUT);

    while(1){
        LED(digitalRead(TouchPin));
        Print(digitalRead(TouchPin));
    }
    return 0;
}

Python

#!/usr/bin/env python
import RPi.GPIO as GPIO

TouchPin = 11
Gpin = 12
Rpin = 13
tmp = 0

def setup():
    GPIO.setmode(GPIO.BOARD)  #Numbers GPIOs by physical location
    GPIO.setup(Gpin, GPIO.OUT) 
    GPIO.setup(Rpin, GPIO.OUT)
    GPIO.setup(TouchPin, GPIO.IN, pull_up_down=GPIO.PUD_UP) #Set BtnPin's mode is input, and pull up to high level(3.3V)

def Led(x):
    if x == 0:
        GPIO.output(Rpin, 1)
        GPIO.output(Gpin, 0)
    if x == 1:
        GPIO.output(Rpin, 0)
        GPIO.output(Gpin, 1)

def Print(x):
    global tmp
    if x != tmp:
        if x == 0:
            print('')
            print('********')
            print('*   ON *')
            print('********')

        if x == 1:
            print('')
            print('********')
            print('* OFF  *')
            print('********')

        tmp = x

def loop():
    while True:
        Led(GPIO.input(TouchPin))
        Print(GPIO.input(TouchPin))

def destroy():
    GPIO.output(Gpin, GPIO.HIGH) #Green led off
    GPIO.output(Rpin, GPIO.HIGH) #Red led off
    GPIO.cleanup()


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