*라즈베리파이
1-1-1. Flask 웹서버
1-1-2. 웹페이지를 구축하여 LED on/off 하기 (버튼생성)
from flask import Flask, request
from flask import render_template
import RPi.GPIO as GPIO
app = Flask(__name__)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(21, GPIO.OUT, initial=GPIO.LOW)
@app.route("/")
def home():
return render_template("index.html")
@app.route("/led/on")
def led_on():
try:
GPIO.output(21, GPIO.LOW)
return "ok"
except expression as identifier:
return "fail"
@app.route("/led/off")
def led_off():
try:
GPIO.output(21, GPIO.HIGH)
return "ok"
except expression as identifier:
return "fail"
if __name__ == "__main__":
app.run(host="0.0.0.0")
//index.py<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>HOME NETWORK</title>
<link rel="stylesheet" href="{{ url_for('static', filename='style.css')}}" />
</head>
<body>
<div class="container">
<div class="header">
<h2>HOME IoT</h2>
</div>
<div class="main">
<div>
<button onclick="led_on()">LED ON</button>
</div>
<div>
<button onclick="led_off()">LED OFF</button>
</div>
</div>
<div id="result">
</div>
</div>
<script>
function led_on() {
fetch("/led/on")
.then(response => response.text())
.then(data => {
console.log(data);
let result = document.querySelector("#result");
if (data == "ok") {
result.innerHTML = "<h1>LED is running</h1>";
} else {
result.innerHTML = "<h1>error</h1>";
}
});
}
function led_off() {
fetch("/led/off")
.then(response => response.text())
.then(data => {
console.log(data);
let result = document.querySelector("#result");
if (data == "ok") {
result.innerHTML = "<h1>LED is stoping</h1>";
} else {
result.innerHTML = "<h1>error</h1>";
}
});
}
</script>
</body>
</html>
//index.htmlbody {
background-color: antiquewhite;
}
.container {
width: 700px;
margin: 0 auto;
text-align: center;
}
.main {
display: flex;
}
.main div {
flex: 1;
}
.main div button {
background-color: rgb(192, 114, 114);
width: 150px;
height: 80px;
border-radius: 10px;
}
// style.css
* C# Review
-네트워크
-프로그램을 만들 때 포트번호를 명시해줘야 한다.
1-1-1. Network
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
namespace _2020._07._28_001
{
class Program
{
static void Main(string[] args)
{ // IP주소 다루기
//IPAddress ipAddr = IPAddress.Parse("202.179.177.21");
//Console.WriteLine(ipAddr);
//IPAddress ipAddr2 = new IPAddress(new byte[] { 202, 179, 177, 21 });
//Console.WriteLine(ipAddr2);
// 아이피 주소와 포트번호를 할당하여 endPoint 객체 생성
//IPAddress ipAddr3 = IPAddress.Parse("192.168.0.1");
//IPEndPoint endPoint = new IPEndPoint(ipAddr3, 9000);
//현재 컴퓨터에 할당된 IP 주소 출력
string myComputer = Dns.GetHostName();
Console.WriteLine("컴퓨터 이름: " + myComputer);
IPHostEntry entry = Dns.GetHostEntry(myComputer);
foreach(IPAddress ipAddress in entry.AddressList )
{
Console.WriteLine(ipAddress.AddressFamily + ": " + ipAddress);
}
}
}
}
1-1-2. Socket
using System;
using System.Net;
using System.Net.Sockets;
class Program
{
static void Main(string[] args)
{
Socket Server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// Any : 현재 내 컴퓨터에 할당된 IP아무거나, 포트번호 : 7000
Server.Bind(new IPEndPoint(IPAddress.Any, 7000));
Server.Listen(100);
// 블로킹메서드(socket)
Socket Client = Server.Accept();
Console.WriteLine("Client Incomming");
byte[] Buffer = new byte[] { 65, 66, 67, 68 };
// send가 char형으로 안보내줌
Client.Send(Buffer);
Client.Close();
Server.Close();
}
}
1-1-3. putty로 접속
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