라즈베리 파이 연동) led on/off

 

<activity_main.xml>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="13dp"
        android:text="Raspberry IP Address" />

    <EditText
        android:id="@+id/ipAddress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:text="192.168.0.138:21567" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btnOn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:layout_marginRight="2dp"
            android:text="On" />

        <Button
            android:id="@+id/btnOff"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="2dp"
            android:layout_weight="1"
            android:text="Off" />


    </LinearLayout>

</LinearLayout>

 

<MainActivity>

package com.example.automicapp;

import androidx.appcompat.app.AppCompatActivity;

import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class MainActivity extends AppCompatActivity {
    Button btnOn, btnOff;
    EditText ipAddress;
    //    Socket myAppSocket = null;
    public static String wifiModuleIP = "";
    public static int wifiModulePort = 0;
    public static String CMD = "0";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnOn = findViewById(R.id.btnOn);
        btnOff = findViewById(R.id.btnOff);
        ipAddress = findViewById(R.id.ipAddress);

        btnOn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getIPandPort();
                CMD="O";
                Socket_AsyncTask socket_on = new Socket_AsyncTask();
                socket_on.execute();
            }
        });
        btnOff.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getIPandPort();
                CMD="F";
                Socket_AsyncTask socket_on = new Socket_AsyncTask();
                socket_on.execute();
            }
        });


    }
    public  void getIPandPort(){
        String iPandPort = ipAddress.getText().toString();
        Log.d("MY TEST","IP String: "+ iPandPort);
        String temp[] = iPandPort.split(":");
        wifiModuleIP = temp[0];
        wifiModulePort = Integer.valueOf(temp[1]);
        Log.d("MY TEST", "IP:"+wifiModuleIP);
        Log.d("MY TEST", "PORT:"+wifiModulePort);
    }

    public class Socket_AsyncTask extends AsyncTask<Void,Void,Void> {
        Socket socket;
        @Override
        protected Void doInBackground(Void... params) {
            try{
                InetAddress inetAddress = InetAddress.getByName(MainActivity.wifiModuleIP);
                socket = new java.net.Socket(inetAddress, MainActivity.wifiModulePort);
                DataOutputStream dataOutputStream = new DataOutputStream(socket.getOutputStream());
                dataOutputStream.writeBytes(CMD);
                dataOutputStream.close();
                socket.close();
            }
            catch (UnknownHostException e){e.printStackTrace();}
            catch (IOException e){e.printStackTrace();}

            return  null;
        }
    }
}

 

<AndroidManifest.xml>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.automicapp">
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.AutomicApp">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 

 

---

라즈베리파이 파이썬 파일 

 

LEDControl.py

import RPi.GPIO as GPIO
import time
cur_led = 0
LED = 23

def setup():
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(LED,GPIO.OUT)

def LedOn():
    GPIO.output(LED, GPIO.HIGH)
    cur_led = 1
        
def LedOff():
    GPIO.output(LED, GPIO.LOW)
    cur_led = 0

def close():
    GPIO.cleanup()

if __name__ == '__main__':
    setup()

 

pi_led_server.py

import LEDControl
from socket import *
from time import ctime
import RPi.GPIO as GPIO


LEDControl.setup()

ctrCmd = ['LedOn','LedOff']

HOST = ''
PORT = 21567
BUFSIZE = 1024
ADDR = (HOST,PORT)

tcpSerSock = socket(AF_INET, SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)

while True:
        print('Waiting for connection')
        tcpCliSock,addr = tcpSerSock.accept()
        print('...connected from :', addr)
        try:
                while True:
                    data = ''
                    data = tcpCliSock.recv(BUFSIZE)
                    data = data.decode('utf-8')
                    print(data)
                    if not data:
                        break
                    if data == ctrCmd[0]:
                        LEDControl.LedOn()
                        print('LED On: ',LEDControl.cur_led)
                    if data == ctrCmd[1]:
                        LEDControl.LedOff()
                        print('LED Off: ',LEDControl.cur_led)
        except KeyboardInterrupt:
                GPIO.cleanup()
tcpSerSock.close();