[vc_row][vc_column][vc_column_text]Refers to a Touch Sensor , it can serve as a touch switch.

[/vc_column_text][vc_tour][vc_tab title=”Part list” tab_id=”1394069327-1-12″][vc_column_text]1. 1  x  Touch Sensor

2. Several male to female dupont line

3. 1  x  pcDuino[/vc_column_text][/vc_tab][vc_tab title=”Wiring Diagram” tab_id=”1394069327-2-48″][vc_column_text]SIG pin –  > pcDuino GPIO pin  one  of D1~D13
[/vc_column_text][/vc_tab][vc_tab title=”Test code” tab_id=”1394127075873-2-7″][vc_column_text]GPIO entity class

package com.test;

import java.io.BufferedReader;

public class GPIO_Pin {

    private String modeURI = "/sys/devices/virtual/misc/gpio/mode/";
    private String statusURI = "/sys/devices/virtual/misc/gpio/pin/";
    private int pin = 0;
    public static final String HIGH = "1", LOW = "0", INPUT = "0", OUTPUT = "1", INPUT_PU = "8";

    public GPIO_Pin(int pin) {
        modeURI += "gpio" + pin;
        statusURI += "gpio" + pin;
        this.pin = pin;
    }

    public GPIO_Pin(String pin) {
        // Finalize file paths
        modeURI += "gpio" + pin;
        statusURI += "gpio" + pin;
        this.pin =Integer.parseInt(pin);
    }

    public int getPin() {
        return pin;
    }

    public void overrideURI(String uri) {
        modeURI = uri + "mode/gpio" + pin;
        statusURI = uri + "pin/gpio" + pin;
    }

    public void setMode(String mode) {
        writeToFile(getModeURI(), mode);
    }

    public void set(String state) {
        writeToFile(getStatusURI(), state);
    }

    public void setHIGH() {
        writeToFile(getStatusURI(), HIGH);
    }

    public void setLOW() {
        writeToFile(getStatusURI(), LOW);
    }

    public void setModeINPUT() {
        writeToFile(getModeURI(), INPUT);
    }

    public void setModeOUTPUT() {
        writeToFile(getModeURI(), OUTPUT);
    }

    public void setModeINPUT_PU() {
        writeToFile(getModeURI(), INPUT_PU);
    }

    public String getModeURI() {
        return modeURI;
    }

    public String getStatusURI() {
        return statusURI;
    }

    public String getPinMode() {
        try {
            BufferedReader reader = new BufferedReader(new FileReader(getModeURI()));
            String data = reader.readLine();
            reader.close();
            return data;
        } catch (IOException e) {
        }
        return "";
    }

    public String getPinStatus() {
        try {
            BufferedReader reader = new BufferedReader(new FileReader(getStatusURI()));
            String data = reader.readLine();
            reader.close();
            return data;
        } catch (IOException e) {
        }
        return "";
    }

    private void writeToFile(String URI, String data) {
        try {
            File file = new File(URI);
            file.delete();
            File newFile = new File(URI);
            newFile.createNewFile();
            FileWriter writer = new FileWriter(URI);
            writer.write(data);
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
Test class
package com.test;

public class test {
    public static void main(String[] args) throws InterruptedException {
        GPIO_pin TSpin=new GPIO_pin(9);
        TSpin.setModeINPUT();
        while (true) {
            if("1".equals(TSpin.getPinStatus()))
                System.out.println("touch!");
            else
                System.out.println("not touch!");
            Thread.sleep(400);
        }
    }
}

[/vc_column_text][/vc_tab][vc_tab title=”Test result” tab_id=”1394127092216-3-10″][vc_column_text]When your finger touching the Touch Sensor, it will output

[/vc_column_text][/vc_tab][/vc_tour][/vc_column][/vc_row]