Controlling Epson projector

[Cristi Datki 0]

Hi, need to controll Epson projector (send PWR On, PWR Off, PWR?) messages

For controllinhg Epson, need to send a command for establishing connection (0x450x530x430x2F0x560x0500x2E0x6E0x650x740x100x030x000x000x000x00) and after that send the command for interogating power status (0x500x570x520x3f0x0d)

 

Testing this from Hercules utility, works great

When coding in LUA, after sending first command, when trying to send second command I get Connection reset by peer error

If sending just first command, I get a proper response, so, no error in connection or command string

 

 

Here is my code:

function QuickApp:onInit()

    self:debug("onInit")

    self.ip = self:getVariable("ip")

    self.port = tonumber(self:getVariable("port"))

    self.sock = net.TCPSocket()

end

 

function QuickApp:parseData(str)

    while true do 

        if string.find(str, '0x') then

            i,j = string.find(str, '0x')

            str = string.sub(str, 1, i - 1) .. self:fromhex(string.sub(str, i + 2, j +2)) .. string.sub(str, j + 3)

        else

            return str

        end

    end

end

 

function QuickApp:fromhex(str)

    return (str:gsub('..', function(cc)

        return string.char(tonumber(cc, 16))

    end))

end

 

function QuickApp:connect(successCallback)

    print("connecting:", self.ip, self.port)

    self.sock:connect(self.ip, self.port, {

        success = function()

            self:debug("connected")

            successCallback()

        end,

        error = function(err)

            self.sock:close()

            self:debug("connection error connect", err)

        end,

    })

end 

 

function QuickApp:init(event)

    --self:connect()

    self:send("0x450x530x430x2F0x560x0500x2E0x6E0x650x740x100x030x000x000x000x00", true, "0x500x570x520x3f0x0d")

end

 

function QuickApp:send(dataToSend, waitForResponse, pwr)   

        self:connect(function()

            local dataConverted = self:parseData(dataToSend)

            local pwrConverted = self:parseData(pwr)

            self.sock:write(dataConverted)

            fibaro.setTimeout(1000, function() self.sock:write(pwrConverted) end)

            self.sock:read({

                success = function(data)

                    self:debug("response data:", data)

                    --self.sock:close()

                end,

                error = function(err)

                    self:debug("response error wait ", err)

                    --self.sock:close()

                end

            })

            fibaro.setTimeout(1000, function() self.sock:write(pwrConverted) end)

            self.sock:read({

                success = function(data)

                    self:debug("response data:", data)

                    --self.sock:close()

                end,

                error = function(err)

                    self:debug("response error wait ", err)

                    --self.sock:close()

                end

            })

        end)

end

 

Looks like the connection is closed after frist call, but do not know how to keep alive, tried everything

 

Can anybody help me?

 

Regards

 

[jgab 1,954]

I don't know what the response from the Epson is but something like this should work. (The code under --- QuickApp --- + fromhex/tohex )

A side note. Not having an Epson to test against I can run this in my emulator and simulate a TCPsocket device. Easy to debug...  

Please login or register to see this code.

 

Edited April 29, 2021 by jgab

[Cristi Datki 0]

Hi, looks like the connectin is remaining open, but now I haev bad file descriptor when trying to send the second stream. 

 

The syntax of command are correct, tested in Hercules security

 

here my code:

 

function QuickApp:connect()

  self.sock:connect(self.ip,self.port,

    {success = 

      function()

        self:debug("connecting:", self.ip, self.port)

            self:send("45 53 43 2F 56 50 2E 6E 65 74 10 03 00 00 00 00 0d", true, "0x500x570x520x3f") -- getting status of projector

            --self:send("0x450x530x430x2F0x560x0500x2E0x6E0x650x740x100x030x000x000x000x00", true, "5057523f0d") -- getting status of projector

      end,

      error = function(err) self:debug(err) end

    }

  )

  

end 

 

function QuickApp:send(dataToSend, waitForResponse, pwr)    

            local dataConverted = self:parseData(dataToSend)

            local pwrConverted = self:parseData(pwr)

            self.sock:write(dataConverted)

            --self.sock:write("ESC/VP.net/r")

            --fibaro.setTimeout(1000, function() self.sock:write(pwrConverted) end)

            --self.sock:readUntil("0x450x530x430x2F0x560x500x2E0x6E0x650x740x100x200x000x000x400x00",{

            self.sock:read({

                success = function(data)

                    local function tohex(str)

                        local bs = {}

                        for i=1,str:len() do bs[#bs+1] = string.format('0x%02X',string.byte(str,i)) end

                        return table.concat(bs)

                    end

                    self:debug("response data:", tohex(data), "  ", data)

                    -- pwrConverted

                    self.sock:write("pwrConverted", {

                        success = function(data)

                            self:debug("1 ", data)

                        end,

                        error = function(err)

                            self:debug("2 ", err)

                        end

                    })

 

                    self:debug("should be ok")

 

                    self.sock:close()

                end,

                error = function(err)

                    self:debug("response error wait ", err)

                    self.sock:close()

                end

            })

end

 

any ideeas?

when debugging, get response from the first command, then "shoul be od", the "2 bad descriptor of file"