arduino 与 android 通过TCP进行字节收发
arduino
#include <avr/wdt.h> #include <SoftwareSerial.h> #define FPIN 13 SoftwareSerial mySerial(10, 11); // RX, TX unsigned long lastSendTime=0; unsigned long lastReceiveTime=0; unsigned long SafeKey=987654321UL; // Max 4,294,967,295 String RecCache=""; void setup() { // put your setup code here, to run once: pinMode(FPIN,OUTPUT); digitalWrite(FPIN,LOW); Serial.begin(9600); delay(100); Serial.println("Ready!"); //========Wifi Config============= initWifi(); } void loop() { // put your main code here, to run repeatedly: handleTXR(); } void initWifi(){ mySerial.begin(9600); delay(100); mySerial.println("AT+RST"); delayAndRead(3000); mySerial.println("AT+CIPMUX=1"); delayAndRead(500); mySerial.println("AT+CIPSERVER=1"); delayAndRead(500); } void handleTXR(){ //handle user input cmd while (Serial.available()){ mySerial.write(Serial.read()); } while(mySerial.available()){ char c= mySerial.read(); RecCache=RecCache +(String)c; } int bIndex= RecCache.indexOf("$F"); if(bIndex>=0){ int eIndex=RecCache.indexOf("$E",bIndex); if(eIndex>=0){ //Extra Data String data=RecCache.substring(bIndex+2,eIndex); RecCache=RecCache.substring(eIndex); lastReceiveTime=millis(); handleCmd(data); } }else{ RecCache=""; } if(RecCache.length()>=512)RecCache=""; } void handleCmd(String cmd){ Serial.println("cmd->" + cmd +"."); if(cmd.startsWith("HB:")){ byte bs[4]; long2byte(millis(),bs); String msg=bytes2String(bs,0,4);// (String)((char)bs[0]) +(String)((char)bs[1]) +(String)((char)bs[2]) +(String)((char)bs[3]) ; reply(true,"HB",msg); }else if(cmd.startsWith("F:")){ fireCmd(cmd); } } void fireCmd(String cmd){ byte safeBytes[4]={0,0,0,0}; for(int i=0;i<4;i++){ safeBytes[i]=(byte)cmd.charAt(2+i); //Serial.print(safeBytes[i],HEX); //Serial.print(","); } unsigned long sk= bytes2long(safeBytes); byte duration=cmd.charAt(6); if(duration>15) duration=15; if(duration<=0)duration=1; if(sk!=SafeKey){ reply(false,"F","Safe Key not match!"); return; } reply(true,"F",""); digitalWrite(FPIN,HIGH); delay(duration * 1000); digitalWrite(FPIN,LOW); } void reply(bool isOk,String cmd,String msg){ String rStr=""; if(isOk){ rStr="$FOK-" + cmd +":" +msg +"$E"; mySerial.println("AT+CIPSEND=0," + (String)rStr.length()); delay(10); mySerial.println(rStr); }else{ rStr="$FEE-" + cmd +":" +msg +"$E"; mySerial.println("AT+CIPSEND=0," + (String)rStr.length()); delay(10); mySerial.println(rStr); } } String bytes2String(byte bs[],int offset,int len){ String t=""; for(int i=offset;i<len;i++){ t +=(String)((char)bs[i]); } return t; } void cls(){ while(mySerial.available()){ mySerial.read(); } } void delayAndRead(int waitTime){ delay(waitTime); while(mySerial.available()){ Serial.write(mySerial.read()); } } void long2byte(unsigned long res,byte targets[] ) { targets[0] = (byte) (res & 0xff);// 鏈�浣庝綅 targets[1] = (byte) ((res >> 8) & 0xff);// 娆′綆浣� targets[2] = (byte) ((res >> 16) & 0xff);// 娆￠珮浣� targets[3] = (byte) (res >> 24);// 鏈�楂樹綅,鏃犵鍙峰彸绉汇�� } unsigned long bytes2long(byte buf[]) { unsigned long firstByte = 0; unsigned long secondByte = 0; unsigned long thirdByte = 0; unsigned long fourthByte = 0; int index = 0; firstByte = (0x000000FFU & ( buf[index+3])); secondByte = (0x000000FFU & ( buf[index + 2])); thirdByte = (0x000000FFU & ( buf[index + 1])); fourthByte = (0x000000FFU & ( buf[index ])); index = index + 4; return ((unsigned long) (firstByte << 24 | secondByte << 16 | thirdByte << 8 | fourthByte)) & 0xFFFFFFFFUL; }
android
package cn.fstudio.wificracker; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import java.net.Socket; import java.net.SocketTimeoutException; import java.util.Date; import org.apache.http.util.EncodingUtils; import junit.framework.Protectable; import android.R.integer; import android.content.Context; import android.os.Handler; import android.os.Message; import android.util.Log; import android.widget.Toast; public class TCPClient { private Handler mHandler=null; private volatile boolean isConnecting = false; private Thread mThreadClient = null; private Socket mSocketClient = null; private BufferedReader mBufferedReaderClient = null; public OutputStream os=null; public InputStream is=null; private String ip; private int port; private boolean Enabled=false; public boolean isEnabled(){ return Enabled; } public boolean isConnecting() { return isConnecting; } public TCPClient(Handler handler,String ip,int port) { this.mHandler=handler; this.ip=ip; this.port=port; } public void Start(){ if(Enabled)return; Enabled=true; _Start(); } public void Stop(){ Enabled=false; _Stop(); } private void _Start(){ mThreadClient = new Thread(mRunnable); mThreadClient.start(); } private void _Stop(){ isConnecting=false; try { if(mSocketClient!=null) { mSocketClient.close(); mSocketClient = null; os.close(); os=null; is.close(); is=null; mBufferedReaderClient.close(); mBufferedReaderClient=null; } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } try{ Thread.sleep(3000); if(mThreadClient!=null) mThreadClient.interrupt(); }catch(Exception e){ e.printStackTrace(); } } public void sendMsg(String msg){ try { byte[] cs=msg.getBytes("UTF-8"); os.write(cs, 0, cs.length); os.flush(); } catch(Exception e) { } } private Runnable mRunnable = new Runnable() { public void run() { String sIP = ip; Log.d("T", "IP:"+ sIP + ":" + port); try{ ConnectAndReceive(sIP); }catch(Exception e){ SendMsgToUI("运行异常:" + e.getMessage() + "\n", MainActivity.MESSAGE_ERROR); }finally{ try{ if(Enabled){ _Stop(); } }catch(Exception e){} if(Enabled){ _Start(); } } } private void ConnectAndReceive(String sIP) { try { mSocketClient = new Socket(sIP, port); //portnum mSocketClient.setSoTimeout(1000 * 30); mSocketClient.setKeepAlive(true); //mBufferedReaderClient = new BufferedReader(new InputStreamReader(mSocketClient.getInputStream())); is=mSocketClient.getInputStream(); os= mSocketClient.getOutputStream(); isConnecting=true; sendMsg("$FHB:$E"); //break; } catch (Exception e) { throw new RuntimeException("无法链接->" + ip +":" + String.valueOf(port)); } //char[] buffer = new char[256]; int count = 0; int errCount=0; byte[] Cache=new byte[1024]; while (Enabled) { try { byte[] buffer=new byte[1024]; if((count=is.read(buffer, 0, buffer.length))>0){ String revMsg= new String(buffer,0,count, "UTF-8"); int bIndex=revMsg.indexOf("$F"); if(bIndex>=0){ int eIndex =revMsg.indexOf("$E", bIndex); if(eIndex>0){ handMsg(revMsg.substring(bIndex +2, eIndex) ,buffer); } } }else { SendMsgToUI("空数据", MainActivity.MESSAGE_ERROR); throw new RuntimeException("链接异常"); } }catch(SocketTimeoutException e){ errCount++; if(errCount<=3){ continue; } if(errCount>3){ isConnecting=false; throw new RuntimeException("链接异常"); } } catch (Exception e) { throw new RuntimeException("网络断开"); } }//end while } private void handMsg(String cmdReply,byte[] rawBytes) { //处理心跳回复 if(cmdReply.startsWith("OK-HB:")){ try { byte[] hbReplyBytes = cmdReply.getBytes("UTF-8"); long millis= BitConvert.unsigned4BytesToInt(rawBytes, 8); Message msg = new Message(); msg.obj ="HB:" + millis; msg.what = MainActivity.MESSAGE_ERROR; mHandler.sendMessage(msg); return; } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } } Message msg = new Message(); msg.obj = cmdReply; msg.what = MainActivity.MESSAGE_ERROR; mHandler.sendMessage(msg); Log.d("T", cmdReply); } }; private void SendMsgToUI(String txt,int what){ Message msg= mHandler.obtainMessage(); msg.what=what; msg.obj=txt; msg.sendToTarget(); } private String getInfoBuff(char[] buff, int count) { char[] temp = new char[count]; for(int i=0; i<count; i++) { temp[i] = buff[i]; } return new String(temp); } }
package cn.fstudio.wificracker; public class BitConvert { /** * 灏嗕竴涓崟瀛楄妭鐨刡yte杞崲鎴�32浣嶇殑int * * @param b * byte * @return convert result */ public static int unsignedByteToInt(byte b) { return (int) b & 0xFF; } /** * 灏嗕竴涓崟瀛楄妭鐨凚yte杞崲鎴愬崄鍏繘鍒剁殑鏁� * * @param b * byte * @return convert result */ public static String byteToHex(byte b) { int i = b & 0xFF; return Integer.toHexString(i); } /** * 灏嗕竴涓�4byte鐨勬暟缁勮浆鎹㈡垚32浣嶇殑int * * @param buf * bytes buffer * @param byte[]涓紑濮嬭浆鎹㈢殑浣嶇疆 * @return convert result */ public static long unsigned4BytesToInt(byte[] buf, int pos) { int firstByte = 0; int secondByte = 0; int thirdByte = 0; int fourthByte = 0; int index = pos; firstByte = (0x000000FF & ((int) buf[index+3])); secondByte = (0x000000FF & ((int) buf[index + 2])); thirdByte = (0x000000FF & ((int) buf[index + 1])); fourthByte = (0x000000FF & ((int) buf[index ])); index = index + 4; return ((long) (firstByte << 24 | secondByte << 16 | thirdByte << 8 | fourthByte)) & 0xFFFFFFFFL; } /** * 灏�16浣嶇殑short杞崲鎴恇yte鏁扮粍 * * @param s * short * @return byte[] 闀垮害涓�2 * */ public static byte[] shortToByteArray(short s) { byte[] targets = new byte[2]; for (int i = 0; i < 2; i++) { int offset = (targets.length - 1 - i) * 8; targets[i] = (byte) ((s >>> offset) & 0xff); } return targets; } /** * 灏�32浣嶆暣鏁拌浆鎹㈡垚闀垮害涓�4鐨刡yte鏁扮粍 * * @param s * int * @return byte[] * */ public static byte[] intToByteArray(int s) { byte[] targets = new byte[2]; for (int i = 0; i < 4; i++) { int offset = (targets.length - 1 - i) * 8; targets[i] = (byte) ((s >>> offset) & 0xff); } return targets; } /** * long to byte[] * * @param s * long * @return byte[] * */ public static byte[] longToByteArray(long s) { byte[] targets = new byte[2]; for (int i = 0; i < 8; i++) { int offset = (targets.length - 1 - i) * 8; targets[i] = (byte) ((s >>> offset) & 0xff); } return targets; } /**32浣峣nt杞琤yte[]*/ public static byte[] int2byte(int res) { byte[] targets = new byte[4]; targets[0] = (byte) (res & 0xff);// 鏈�浣庝綅 targets[1] = (byte) ((res >> 8) & 0xff);// 娆′綆浣� targets[2] = (byte) ((res >> 16) & 0xff);// 娆￠珮浣� targets[3] = (byte) (res >> 24);// 鏈�楂樹綅,鏃犵鍙峰彸绉汇�� return targets; } /** * 灏嗛暱搴︿负2鐨刡yte鏁扮粍杞崲涓�16浣峣nt * * @param res * byte[] * @return int * */ public static int byte2int(byte[] res) { // res = InversionByte(res); // 涓�涓猙yte鏁版嵁宸︾Щ24浣嶅彉鎴�0x??000000锛屽啀鍙崇Щ8浣嶅彉鎴�0x00??0000 int targets = (res[0] & 0xff) | ((res[1] << 8) & 0xff00); // | 琛ㄧず瀹変綅鎴� return targets; } }
注意：
char c= mySerial.read();
RecCache=RecCache +(String)c;
遇到byte=0 时会发生错误
如果需要按byte接收数据，请采用
http://www.cnblogs.com/wdfrog/p/4988244.html
的方式
