Arduino实验：JAVA控制LED，PWM调节亮度

做这个小实验的灵感来自网友xavierchen，他用ENC28J60做了一个网络控制LED的东西，上位机用WEB方式来控制。

自已手头上正好有个W5100,本人对WEB编程不熟，所以就用了自己比较熟悉的JAVA写了一个上位机控制端。东西很简单，发出来给我像一样的初学者参考，共同学习



一、硬件准备：

1、Arduino uno r3

2、EthernetShiled W5100

3、面包板 1个

4、发光二极管 1个

5、杜邦线 两根

6、网线 1根

7、1K电阻一个

二、开发环境：

1、Arduino IDE －－开发下位机程序

2、Eclipse for JAVA－－开发上位机程序

3、sscom32 串口信息查看软件－－查看arduino接收数据、调试

三、LED灯连线图（PS，这个面包板结构让我费解了很久，好吧，我承认现在依然费解……）

LED连接图

2013-9-21 12:50 上传
(66.97 KB)

LED连接图





四、原理

JAVA(上位机Client)——>EthernetShiled（以太网模块）——>Arduino（下位机Server，PWM）——>LED

上位机与以太网模块采用socket TCP连接通信



五、下位机－－arduino程序

ARDUINO 代码复制打印

#include <SPI.h>#include <Ethernet.h>byte mac[]={0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};IPAddress serverIP(192,168,2,1);int serverPort=1981;EthernetServer server(serverPort);int whitePin=9;void setup(){Serial.begin(9600);pinMode(whitePin,OUTPUT);Ethernet.begin(mac,serverIP);server.begin();Serial.println("Server started");}void loop(){EthernetClient client=server.available();if(client){  String clientMsg="";  while(client.connected()){  if(client.available()){  int c=client.read();  analogWrite(whitePin,c);  Serial.println(c);  }  }}delay(1);client.stop();}
#include <SPI.h>


#include <Ethernet.h>


byte mac[]={0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};


IPAddress serverIP(192,168,2,1);


int serverPort=1981;


EthernetServer server(serverPort);


int whitePin=9;


void setup(){


Serial.begin(9600);


pinMode(whitePin,OUTPUT);


Ethernet.begin(mac,serverIP);


server.begin();


Serial.println("Server started");


}





void loop(){


EthernetClient client=server.available();


if(client){


String clientMsg="";


while(client.connected()){


if(client.available()){


int c=client.read();


analogWrite(whitePin,c);


Serial.println(c);


}


}


}


delay(1);


client.stop();


}

六、上位机程序
JAVA 代码复制打印
import java.beans.ExceptionListener;import java.io.DataOutputStream;import java.io.IOException;import java.net.Socket;import java.net.UnknownHostException;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JSlider;import javax.swing.JTextField;import javax.swing.event.ChangeEvent;import javax.swing.event.ChangeListener;public class ledManager extends JFrame implements ChangeListener{JTextField textField1;JLabel label1;JSlider slider1;JPanel panel;private static final String ServerIP="192.168.2.1";private static final int ServerPort=1981;private Socket client;public int str;public void init(){setTitle("LED灯网络控制端");setSize(500,80);setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//setLocationRelativeTo(JFrame.CENTER_ALIGNMENT)label1=new JLabel("LED1");textField1=new JTextField(5);slider1=new JSlider(JSlider.HORIZONTAL,0,255,10);panel=new JPanel();panel.add(label1);panel.add(slider1);panel.add(textField1);add(panel);slider1.addChangeListener(this);}public void stateChanged(ChangeEvent event) {// TODO Auto-generated method stubstr=slider1.getValue();textField1.setText(""+str);try {sendSingle(str);System.out.println(str);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void connServer() throws IOException{System.out.println("try to connecting Server!");client=new Socket(ServerIP,ServerPort);System.out.println("Successful to connected Arduino");}public void discConnServer() throws IOException{client.close();}public void sendSingle(int s) throws IOException{DataOutputStream send=new DataOutputStream(client.getOutputStream());send.write(s);}//public void senSingle(String s) throws Exception, IOException{//final String ServerIP="192.168.2.1";//final int ServerPort=8888;//Socket cs=new Socket(ServerIP,ServerPort);//System.out.println("connect to Server:"+ServerIP+"at port:"+ServerPort);//DataOutputStream singleToArduino=new DataOutputStream(cs.getOutputStream());//singleToArduino.writeBytes(s);//cs.close();//}public static void main(String[] args) throws IOException{ledManager ldm=new ledManager();ldm.connServer();ldm.init();}}
import java.beans.ExceptionListener;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.Socket;

import java.net.UnknownHostException;



import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JSlider;

import javax.swing.JTextField;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;



public class ledManager extends JFrame implements ChangeListener{



JTextField textField1;

JLabel label1;

JSlider slider1;

JPanel panel;

private static final String ServerIP="192.168.2.1";

private static final int ServerPort=1981;

private Socket client;

public int str;



public void init(){

setTitle("LED灯网络控制端");

setSize(500,80);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//setLocationRelativeTo(JFrame.CENTER_ALIGNMENT)

label1=new JLabel("LED1");

textField1=new JTextField(5);

slider1=new JSlider(JSlider.HORIZONTAL,0,255,10);

panel=new JPanel();

panel.add(label1);

panel.add(slider1);

panel.add(textField1);

add(panel);

slider1.addChangeListener(this);

}

public void stateChanged(ChangeEvent event) {

// TODO Auto-generated method stub

str=slider1.getValue();

textField1.setText(""+str);

try {

sendSingle(str);

System.out.println(str);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public void connServer() throws IOException{

System.out.println("try to connecting Server!");

client=new Socket(ServerIP,ServerPort);

System.out.println("Successful to connected Arduino");

}

public void discConnServer() throws IOException{

client.close();

}

public void sendSingle(int s) throws IOException{

DataOutputStream send=new DataOutputStream(client.getOutputStream());

send.write(s);

}

//public void senSingle(String s) throws Exception, IOException{

//final String ServerIP="192.168.2.1";

//final int ServerPort=8888;

//Socket cs=new Socket(ServerIP,ServerPort);

//System.out.println("connect to Server:"+ServerIP+"at port:"+ServerPort);

//DataOutputStream singleToArduino=new DataOutputStream(cs.getOutputStream());

//singleToArduino.writeBytes(s);

//cs.close();

//}

public static void main(String[] args) throws IOException{

ledManager ldm=new ledManager();

ldm.connServer();

ldm.init();

}

}


存在问题：
1、通过观察，上位机数据发送到下位机的时候，明显发现串口显示的数据有延迟，下位机是只有32K的单片机，这很正常，这个问题如何解决呢？
2、如果使用UDP的通信方式又该怎么做？
3、中午的锅碗瓢盆都没洗，一大堆衣服没洗，这才是最大的问题，肿么办啊
思考：话说这个东西没有多大实际应用价值，但对于我来说意义是重大的，基本上搞清楚了上位机通过以太网与下位机之间的通信问题，接下来可以连接更多的传感器到Arduino上，做些更好玩的东西了。

via - 极客工坊

标签: Arduino教程