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+--- Thread: copas connecting to tcp server cannot receive percentage (/showthread.php?tid=837)
copas connecting to tcp server cannot receive percentage - rocfusion - 14.06.2017
Hi,
Ok so I have a resident script using a copas udp server on the localhost to receive commands from knx objects (event script) , then there is a copas tcp client connecting to an tcp server on the local network. I did it this way so they don't block each other. The issue I am experiencing is that when the tcp server sends out an percentage character the tcp client stops receiving anything else from the server.
Does someone have an idea?
Thanks,
Roger
Code:
if not ready then
socket = require("socket")
copas = require("copas")
alert('not Ready')
ready=true
function parse(data)
alert('parsing... '..data)
end
function fromKNX(command)
alert('from KNX.. '..command)
end
local server = socket.udp()
server:setsockname("127.0.0.1",23456)
function handler(skts)
skts = copas.wrap(skts)
alert("UDP connection handler")
while true do
local s, err
alert("UDP receiving...")
s, erro = skts:receive(2048)
if not s then
alert("UDP Receive error: ", erro)
break
end
alert("Received data, bytes: "..s)
fromKNX(s)
end
end
copas.addserver(server, handler, 1)
end
if not skt then
alert('not socket')
if skt then
skt:close()
skt = nil
end
-- create tcp client
skt, err = socket.connect('10.10.10.41', 4999)
skt:settimeout(0)
copas.addthread(function()
while true do
local resp,err = copas.receive(skt)
if not resp then
alert("TCP Receive error: ", err)
break
end
parse(resp)
end
end)
-- connect ok, reset buffer
if skt then
alert('[tcp-client] connection ok')
warningfailed = true
init()
-- error while connecting,
else
if warningfailed then alert('[tcp-client] connection failed (conn): %s', err) end
warningfailed = false
end
end
copas.loop()RE: copas connecting to tcp server cannot receive percentage - admin - 14.06.2017
Default receive behaviour is to read a single so it will not return until a new line ("\n") character is found in the buffer. Are you sure the server is sending it correctly?
RE: copas connecting to tcp server cannot receive percentage - rocfusion - 14.06.2017
Hi Admin,
Yes, I am testing with the hercules tcp server. for example, i send
1234
12345%
and I don't see 12345% as a alert.
If I then restart the script and send %% then I receive a single % in the alert and then I can continue sending from the tcp server and the client resident script continues to alert the received data.
Thanks,
Roger
You can get the hercules app from http://www.hw-group.com/products/hercules/index_en.html
RE: copas connecting to tcp server cannot receive percentage - admin - 14.06.2017
Alert behaves like string.format and if you pass 12345% it will result in an error. This will be fixed in RC4. For now, just change alert to log.
RE: copas connecting to tcp server cannot receive percentage - rocfusion - 14.06.2017
Hi,
So I changed the copas.addthread function.
Code:
copas.addthread(function()
while true do
local resp,err = copas.receive(skt,'*l')
if not resp then
alert("Jandy Receive error: ", err)
copas.removeserver(skt)
skt = nil
break
end
parse(resp)
end
end)Now when I send % I see in the alerts
there was an error/usr/share/lua/genohm-scada.lua:0: bad argument #2 to 'format' (no value)
Any ideas?
Thanks,
Roger
RE: copas connecting to tcp server cannot receive percentage - admin - 14.06.2017
Code:
function parse(data)
alert('parsing: %s', data)
endRE: copas connecting to tcp server cannot receive percentage - rocfusion - 14.06.2017
Ok, wow... so everything was blocking because the alert statement couldn't concatenate the string?
Big thanks Admin
Thanks,
Roger