八,ESP8266 文件保存数据(基于Lua脚本语言)-阿里云开发者社区

private void button2_Click(object sender, EventArgs e)
        {
            byte[] sendbyte = new byte[6];
            sendbyte[0] = (byte)'+';//2B
            sendbyte[1] = (byte)'+';
            sendbyte[2] = (byte)'M';//4D
            sendbyte[3] = (byte)'D';//44
            sendbyte[4] = (byte)'0';//0

            if (radioButton5.Checked)
            {
                sendbyte[5] = (byte)'0';
            }
            else if (radioButton6.Checked)
            {
                sendbyte[5] = (byte)'1';
            }
            else if (radioButton7.Checked)
            {
                sendbyte[5] = (byte)'2';
            }
            if (radioButtonNetCon.Checked)
            {
                TcpSendDataMethod(sendbyte);
            }
            else if (radioButtonSerialCon.Checked)
            {
                SerialSend(sendbyte);
            }
        }

++MD00 AP模式

++MD01 Station模式

++MD00 AP+Station模式

其实最后还有CRC16校验码

看文件操作

if  file.open("mode.lua", "w+") then
                    file.writeline(string.sub(data,6,6))--MODE
                    print("MODE="..string.sub(data,6,6))
                    file.close()
                else
                    print("open mode.lua faild")    
                end

注意

if  file.open("mode.lua", "w+") then
    file.writeline("123")
    file.flush()//连续写最好加上
    file.writeline("456")
    file.flush()
    file.writeline("789")
    file.close()
else
    print("open mode.lua faild")    
end

像是这样 mode.lua文件里面会是这样

那么读的时候

file.open("mode.lua", "r") then
    s1= file.readline()
    s2= file.readline()
    s3= file.readline()
    file.close()
end

s1 ="123\r"

s2 ="456\r"

s3 ="789\r"

所以写进去一行3个但是读出来会多加一个换行符

if  file.open("mode.lua", "r") then
    local Mode = file.readline()
    if  Mode == nil then
        Mode="2"
    end
    if  Mode:byte(1) == 48 then
        print("Wifi MODE: SOFTAP")
        wifi.setmode(wifi.SOFTAP)
    elseif  Mode:byte(1) == 49 then
            print("Wifi MODE: STATION")
            wifi.setmode(wifi.STATION)  
    else
        print("Wifi MODE: STATIONAP")
        wifi.setmode(wifi.STATIONAP)         
    end
    file.close()
end

直接上源码吧

init.lua

gpio.mode(4,gpio.OUTPUT)
gpio.mode(2,gpio.OUTPUT)
gpio.write(4,1)

if  adc.force_init_mode(adc.INIT_ADC) then
    node.restart()
    return
end

tmr.alarm(0, 1000, 1, function()
    gpio.write(4,1-gpio.read(4))
end)

tmr.alarm(1, 5000, 0, function()
    dofile("file.lua")
    dofile("UDP.lua")
end)

UDP.lua

if  file.open("mode.lua", "r") then
    local Mode = file.readline()
    if  Mode == nil then
        Mode="2"
    end
    if  Mode:byte(1) == 48 then
        print("Wifi MODE: SOFTAP")
        wifi.setmode(wifi.SOFTAP)
    elseif  Mode:byte(1) == 49 then
            print("Wifi MODE: STATION")
            wifi.setmode(wifi.STATION)  
    else
        print("Wifi MODE: STATIONAP")
        wifi.setmode(wifi.STATIONAP)         
    end
    file.close()
end




cfg={}
cfg = wifi.ap.getconfig(true)
if  cfg.ssid == nil then
    cfg.ssid="Hellow8266"
    cfg.pwd="11223344"
end

print("APssid: "..cfg.ssid)
if  cfg.pwd == nil then
    print("APpwd: nil")
else
    print("APpwd: "..cfg.pwd)
end 
cfg.save=true
wifi.ap.config(cfg)

apcfg={}
apcfg = wifi.sta.getconfig(true)

if  apcfg.ssid == nil then
    apcfg.ssid="qqqqq"
    apcfg.pwd="11223344"
end

print("APssid: "..apcfg.ssid)
if  apcfg.pwd == nil then
    print("Stationpwd: nil")
else
    print("Stationpwd: "..apcfg.pwd)
end 

apcfg.save=true
wifi.sta.config(apcfg)
wifi.sta.autoconnect(1)

ConnectIP = "192.168.1.103"
ConnectPort = 8080

UdpSocket = net.createUDPSocket()   
UdpSocket:listen(ConnectPort)



UdpSocketTable={}
UdpIPTable={}
UdpPortTable={}
UdpConnectCnt = 0
UdpCanConnect = 0

UdpSocket:on("receive", function(socket, data, port, ip)
    UdpCanConnect = 1
    for i=0,2 do
        if  UdpIPTable[i] == ip and UdpPortTable[i] == port  then
            UdpCanConnect = 0
        end
    end

    if  ip == ConnectIP and port == ConnectPort  then
        UdpCanConnect = 0
    end

    if  UdpCanConnect == 1 then
        UdpSocketTable[UdpConnectCnt] = socket
        UdpIPTable[UdpConnectCnt] = ip 
        UdpPortTable[UdpConnectCnt] = port
        print("\r\n"..UdpConnectCnt.."-Connect")
        UdpConnectCnt = UdpConnectCnt + 1
    end
    
    if  UdpConnectCnt == 3 then
        UdpConnectCnt = 0
    end
    uart.write(0,data)
end)


UartReadCnt=0
UartReadCntCopy=0
UartReadData=""
UartReadDataCopy=""


uart.on("data",0,function(data) 
    UartReadCnt = UartReadCnt + 1
    UartReadData = UartReadData..data
        
end, 0)



tmr.alarm(2, 5, 1, function()
    if  UartReadCnt ~=0 then
        if  UartReadCnt == UartReadCntCopy  then
            UartReadCnt = 0
            UartReadCntCopy = 0
            UartReadDataCopy = UartReadData
            UartReadData=""
            Config(UartReadDataCopy)
            NetSend(UartReadDataCopy)
        else
            UartReadCntCopy = UartReadCnt  
        end         
    end

end)



function NetSend(data)
    if  UdpSocket ~= nil then
        UdpSocket:send(ConnectPort,ConnectIP,data)
    end
    
    for i=0,2 do
        if  UdpSocketTable[i] ~= nil then
            UdpSocketTable[i]:send(UdpPortTable[i],UdpIPTable[i],data) 
        end
    end
end



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


wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)
   if printip == 0 then
      print("+IP"..T.IP)
   end
   printip = 1
end)

file.lua

就是接收串口的数据函数,检测CRC对不对,,然后把数据写进mode.lua,,,对了这样设置了,,内部会自动生成一个mode.lua,,不用自己弄

function Config(data) 
    local RevLen = string.len (data)
    local crc = ow.crc16(string.sub(data,1,RevLen-2))
    
    local recrc = data:byte(RevLen)
    recrc = recrc*256
    recrc = recrc + data:byte(RevLen-1)

    if  crc == recrc then
         --[[8266 Mode ]]
        if  RevLen == 8  then
            if  string.sub(data,1,5) == "++MD0" then----Mode
                if  file.open("mode.lua", "w+") then
                    file.writeline(string.sub(data,6,6))--MODE
                    print("MODE="..string.sub(data,6,6))
                    file.close()
                else
                    print("open mode.lua faild")    
                end
            end--[[8266 Mode ]]
        end
        
    end
end