五,ESP8266 TCP服务器多连接(基于Lua脚本语言)

想问一件事情--简书,,,代码有没有专门的显示的..比如说插入代码什么的????

一些时间去准备朋友的元器件了...

接着写,,争取今天写完所有的文章,,因为答应了朋友下周5之前要做好朋友的东西

对于TCP大家在玩AT指令的时候有没有发现客户端最多连接5个,,,再连接就不行了??

所以在用AT指令开发的时候单片机程序一定要记得清除多余的连接

现在看用LUA语言怎么做

直接先上菜

Init.lua

gpio.mode(4,gpio.OUTPUT)

gpio.mode(2,gpio.OUTPUT)

gpio.write(4,1)

tmr.alarm(0,1000,1, function()

gpio.write(4,1-gpio.read(4))

end)

tmr.alarm(1,1000,0, function()

dofile("wifi.lua")

end)

wifi.lua

wifi.setmode(wifi.STATIONAP)

cfg={}

cfg.ssid="Hellow8266"cfg.pwd="11223344"wifi.ap.config(cfg)

apcfg={}

apcfg.ssid="qqqqq"apcfg.pwd="11223344"wifi.sta.config(apcfg)

wifi.sta.connect()

TCPSever=net.createServer(net.TCP,28800)

TcpConnectCnt=0TcpSocketTable={}

TCPSever:listen(8080,function(socket)ifTcpConnectCnt ==4thenifTcpSocketTable[0] ~=nil then

TcpSocketTable[0]:close()

TcpSocketTable[0] =nil

endelseifTcpSocketTable[TcpConnectCnt+1] ~=nil then

TcpSocketTable[TcpConnectCnt+1]:close()

TcpSocketTable[TcpConnectCnt+1] =nil

end

end

TcpSocketTable[TcpConnectCnt]=socket

print(TcpConnectCnt.."-Connect")

TcpConnectCnt= TcpConnectCnt +1ifTcpConnectCnt ==5then

TcpConnectCnt=0end

socket:on("receive",function(socket,data)

uart.write(0,data)

end)

socket:on("disconnection",function(sck,c)fori=0,4doifTcpSocketTable[i] ==sck then

TcpSocketTable[i]=nil

print(i.."-Disconnect")

end

end

end)

end)

uart.on("data",0,function(data)fori=0,5doifTcpSocketTable[i] ~=nil then

TcpSocketTable[i]:send(data)

end

end

end,0)

printip=0wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)

printip=0end)

wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)ifprintip ==0then

print("+IP"..T.IP)

end

printip=1end)

下面看解释.............

wifi.setmode(wifi.STATIONAP)--模式AP+STATION就不说了

cfg={}

cfg.ssid="Hellow8266"cfg.pwd="11223344"wifi.ap.config(cfg)--设置模块的无线和密码

apcfg={}

apcfg.ssid="qqqqq"apcfg.pwd="11223344"wifi.sta.config(apcfg)--设置模块连接路由器的无线和密码--wifi.sta.connect()连接路由器,断开后可能就不自动连接了,可以用下面的

wifi.sta.autoconnect(1)可以用这个断开后自动连接路由器

TCPSever=net.createServer(net.TCP,28800) --创建服务器超过28800S不通信断开已有的连接

TcpConnectCnt=0--连接个数计数

TcpSocketTable={}--存储socket

TCPSever:listen(8080,function(socket)

如果0号连接就把1号关掉,,,1号连接就把2号关掉....4号连接就把0号关掉,这样子循环,

当然您会问可以连接5个,,这样子只可以连接四个了,,,为什么....因为如果连接了5个就进不

来这个监听函数了.......所以必须留下一个空位ifTcpConnectCnt ==4thenifTcpSocketTable[0] ~=nil then

TcpSocketTable[0]:close()

TcpSocketTable[0] =nil

endelseifTcpSocketTable[TcpConnectCnt+1] ~=nil then

TcpSocketTable[TcpConnectCnt+1]:close()

TcpSocketTable[TcpConnectCnt+1] =nil

end

end

TcpSocketTable[TcpConnectCnt]= socket--把连接的socket存到数组

print(TcpConnectCnt.."-Connect")--打印几号连接了  对了 .. 是连接符

TcpConnectCnt= TcpConnectCnt +1--连接个数加一ifTcpConnectCnt ==5then --归零

TcpConnectCnt=0end

socket:on("receive",function(socket,data)

uart.write(0,data) --把接收到的数据发到串口

end)

socket:on("disconnection",function(sck,c)fori=0,4do--判断是哪个断开了连接,,就把对应的socket变量置为 nilifTcpSocketTable[i] ==sck then

TcpSocketTable[i]=nil

print(i.."-Disconnect")

end

end

end)

end)

uart.on("data",0,function(data)fori=0,4do--把串口的数据发向不为 nil 的连接ifTcpSocketTable[i] ~=nil then

TcpSocketTable[i]:send(data)

end

end

end,0)--下面是连接路由器和没有连接路由器的监听函数,,好像是1S检测一次

printip=0wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)

printip=0end)

wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)ifprintip ==0then

print("+IP"..T.IP)

end

printip=1end)

现在把程序下进去

测试软件呢在这里下载--也可以自己下载个网络调试助手

https://item.taobao.com/item.htm?spm=686.1000925.0.0.4a155084jlU4Rd&id=558508797404

连接了路由器了....

第一个连接

测试数据

再来几个连接

现在再连接一个

我现在随意断开一个,看一看串口应该打印哪一个断开了连接

现在发数据

好现在呢控制就用多个客户端控制继电器

控制的指令呢咱就配置成----

http://www.cnblogs.com/yangfengwu/p/7513097.html

这篇文章最后的指令,,毕竟最终咱们就要做成那样子.....这样的话8266就应该使用的非常顺手和轻松了

对了在

http://www.cnblogs.com/yangfengwu/p/7520260.html

和http://www.cnblogs.com/yangfengwu/p/7524326.html

这篇两文章中有提及......这次是用多个TCP客户端控制,,还会加上CRC校验

可以直接用软件上的这两个按钮控制

先写不带CRC校验数据的

为了是程序好浏览,,就定义一个函数,,然后调用

现在的wifi.lua

wifi.setmode(wifi.STATIONAP)

cfg={}

cfg.ssid="Hellow8266"cfg.pwd="11223344"wifi.ap.config(cfg)

apcfg={}

apcfg.ssid="qqqqq"apcfg.pwd="11223344"wifi.sta.config(apcfg)

wifi.sta.connect()

TCPSever=net.createServer(net.TCP,28800)

TcpConnectCnt=0TcpSocketTable={}

TCPSever:listen(8080,function(socket)ifTcpConnectCnt ==4thenifTcpSocketTable[0] ~=nil then

TcpSocketTable[0]:close()

TcpSocketTable[0] =nil

endelseifTcpSocketTable[TcpConnectCnt+1] ~=nil then

TcpSocketTable[TcpConnectCnt+1]:close()

TcpSocketTable[TcpConnectCnt+1] =nil

end

end

TcpSocketTable[TcpConnectCnt]=socket

print(TcpConnectCnt.."-Connect")

TcpConnectCnt= TcpConnectCnt +1ifTcpConnectCnt ==5then

TcpConnectCnt=0end

socket:on("receive",function(socket,data)

uart.write(0,data)

control(data)

end)

socket:on("disconnection",function(sck,c)fori=0,4doifTcpSocketTable[i] ==sck then

TcpSocketTable[i]=nil

print(i.."-Disconnect")

end

end

end)

end)

function control(data)ifdata =="++MD610"then

gpio.write(2,1)

print("Relay=1")

endifdata =="++MD600"then

gpio.write(2,0)

print("Relay=0")

end

end

uart.on("data",0,function(data)fori=0,4doifTcpSocketTable[i] ~=nil then

TcpSocketTable[i]:send(data)

end

end

end,0)

printip=0wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)

printip=0end)

wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)ifprintip ==0then

print("+IP"..T.IP)

end

printip=1end)

好现在控制一下

现在用另一个断开

对了最好把信息发给网络对不对,,,控制一下最好通过网络有一个回复

现在的wifi.lua

wifi.setmode(wifi.STATIONAP)

cfg={}

cfg.ssid="Hellow8266"cfg.pwd="11223344"wifi.ap.config(cfg)

apcfg={}

apcfg.ssid="qqqqq"apcfg.pwd="11223344"wifi.sta.config(apcfg)

wifi.sta.connect()

TCPSever=net.createServer(net.TCP,28800)

TcpConnectCnt=0TcpSocketTable={}

NowSocket=nil

TCPSever:listen(8080,function(socket)ifTcpConnectCnt ==4thenifTcpSocketTable[0] ~=nil then

TcpSocketTable[0]:close()

TcpSocketTable[0] =nil

endelseifTcpSocketTable[TcpConnectCnt+1] ~=nil then

TcpSocketTable[TcpConnectCnt+1]:close()

TcpSocketTable[TcpConnectCnt+1] =nil

end

end

TcpSocketTable[TcpConnectCnt]=socket

print(TcpConnectCnt.."-Connect")

TcpConnectCnt= TcpConnectCnt +1ifTcpConnectCnt ==5then

TcpConnectCnt=0end

socket:on("receive",function(socket,data)

NowSocket=socket

uart.write(0,data)

control(data)

end)

socket:on("disconnection",function(sck,c)fori=0,4doifTcpSocketTable[i] ==sck then

TcpSocketTable[i]=nil

print(i.."-Disconnect")

end

end

end)

end)

function control(data)ifdata =="++MD610"then

gpio.write(2,1)

print("Relay=1")ifNowSocket ~=nil then

NowSocket:send("Relay=1")

NowSocket=nil

end

endifdata =="++MD600"then

gpio.write(2,0)

print("Relay=0")ifNowSocket ~=nil then

NowSocket:send("Relay=0")

NowSocket=nil

end

end

end

uart.on("data",0,function(data)fori=0,4doifTcpSocketTable[i] ~=nil then

TcpSocketTable[i]:send(data)

end

end

end,0)

printip=0wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)

printip=0end)

wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)ifprintip ==0then

print("+IP"..T.IP)

end

printip=1end)

好了现在加入CRC16校验数据

现在的wifi.lua

wifi.setmode(wifi.STATIONAP)

cfg={}

cfg.ssid="Hellow8266"cfg.pwd="11223344"wifi.ap.config(cfg)

apcfg={}

apcfg.ssid="qqqqq"apcfg.pwd="11223344"wifi.sta.config(apcfg)

wifi.sta.connect()

TCPSever=net.createServer(net.TCP,28800)

TcpConnectCnt=0TcpSocketTable={}

NowSocket=nil

TCPSever:listen(8080,function(socket)ifTcpConnectCnt ==4thenifTcpSocketTable[0] ~=nil then

TcpSocketTable[0]:close()

TcpSocketTable[0] =nil

endelseifTcpSocketTable[TcpConnectCnt+1] ~=nil then

TcpSocketTable[TcpConnectCnt+1]:close()

TcpSocketTable[TcpConnectCnt+1] =nil

end

end

TcpSocketTable[TcpConnectCnt]=socket

print(TcpConnectCnt.."-Connect")

TcpConnectCnt= TcpConnectCnt +1ifTcpConnectCnt ==5then

TcpConnectCnt=0end

socket:on("receive",function(socket,data)

NowSocket=socket

uart.write(0,data)

control(data)

end)

socket:on("disconnection",function(sck,c)fori=0,4doifTcpSocketTable[i] ==sck then

TcpSocketTable[i]=nil

print(i.."-Disconnect")

end

end

end)

end)

function control(data)

local RevLen=string.len (data)

local crc= ow.crc16(string.sub(data,1,RevLen-2))

local recrc= data:byte(RevLen)

local recrc= recrc*256local recrc= recrc + data:byte(RevLen-1)ifcrc ==recrc thenifstring.sub(data,1,7) =="++MD610"then

gpio.write(2,1)

print("Relay=1")ifNowSocket ~=nil then

NowSocket:send("Relay=1")

NowSocket=nil

end

endifstring.sub(data,1,7) =="++MD600"then

gpio.write(2,0)

print("Relay=0")ifNowSocket ~=nil then

NowSocket:send("Relay=0")

NowSocket=nil

end

endelseifNowSocket ~=nil then

NowSocket:send("CRC16 Faild")

NowSocket=nil

end

end

end

uart.on("data",0,function(data)fori=0,4doifTcpSocketTable[i] ~=nil then

TcpSocketTable[i]:send(data)

end

end

end,0)

printip=0wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)

printip=0end)

wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)ifprintip ==0then

print("+IP"..T.IP)

end

printip=1end)

他呢,,参数要填写字符串

上位机的CRC计算函数

//////////////////privateintcrc16_modbus(byte[] modbusdata,intlength)

{inti, j;intcrc =0x0;try{for(i =0; i < length; i++)

{

crc^=modbusdata[i];for(j =0; j <8; j++)

{if((crc &0x01) ==1)

{

crc= (crc >>1) ^0xa001;

}else{

crc>>=1;

}

}

}

}catch(Exception)

{throw;

}returncrc;

}

我的置高继电器函数

privatevoidbutton7_Click_1(objectsender, EventArgs e)

{byte[] sendbyte =newbyte[7];

sendbyte[0] = (byte)'+';//2Bsendbyte[1] = (byte)'+';

sendbyte[2] = (byte)'M';//4Dsendbyte[3] = (byte)'D';//44sendbyte[4] = (byte)'6';//6sendbyte[5] = (byte)'1';//1if(comboBox3.Text=="继电器")//pin2{

sendbyte[6] = (byte)'0';

}elseif(comboBox3.Text =="CS")//pin8{

sendbyte[6] = (byte)'1';

}elseif(comboBox3.Text =="MOSI")//pin7{

sendbyte[6] = (byte)'2';

}elseif(comboBox3.Text =="MISO")//pin6{

sendbyte[6] = (byte)'3';

}elseif(comboBox3.Text =="CLK")//pin5{

sendbyte[6] = (byte)'4';

}if(radioButtonNetCon.Checked)//网络发送{

TcpSendDataMethod(sendbyte);

}elseif(radioButtonSerialCon.Checked)//串口发送{

SerialSend(sendbyte);

}

}////////////privatevoidTcpSendDataMethod(byte[] byt)

{intcrc =0;byte[] sendbyte =newbyte[byt.Length +2];for(inti =0; i < byt.Length; i++)

{

sendbyte[i]=byt[i];

}

crc= crc16_modbus(byt, byt.Length);//计算CRCbyte[] Crcbyte = System.BitConverter.GetBytes(crc);//得到CRCsendbyte[sendbyte.Length-2] = Crcbyte[0];

sendbyte[sendbyte.Length-1] = Crcbyte[1];try{ networkstrem.Write(sendbyte,0, sendbyte.Length); }catch(Exception) { MessageBox.Show("请检查连接","提示!"); }

}

还要说一点让8266计算CRC,发现8266存储数据是大端模式......

好了现在测试一下用软件的按钮控制

好啦终于这完这一篇了....累..真心的累.............