Control Daikin Splits using NAC via Global Cache IP2IR

Help please, I plan to control my Daikin Splits using SHAC via Global Cache IP2IR devices. The challenge is how to send the message from (S)NAC to the Global Cache device which is described in the attached doc. I have extracted the following relevant bit....

"Communication with the iTach is accomplished by opening a TCP socket on Port 4998. All commands
and data, with the exception of serial (RS232) data, are communicated through Port 4998. Port 4998 is
used for such things as iTach status, IR data, relay operation, and reading digital input states. All
information, with the exception of serial data, is communicated by comma delimited ASCII text strings
terminated by a carriage return (↵)." ​

In summary, I need to be able to send something like this (capture from the AC remote) to IP 192.168.86.93 on port 4998 from a shac event script
<sendir,1:1,1,36764,1,1,16,15,16,16,16,16,16,16,15,16,16,935,128,64,16,48,16,15,16,16,16,16,16,48,16,16,15,16,16,16,16,16,16,48,16,15,16,48,16,48,16,16,16,48,16,48,16,48,16,48,16,48,16,16,16,16,15,49,15,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,49,15,16,16,48,16,16,16,16,16,15,16,48,16,48,16,16,16,16,16,16,15,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,48,16,48,16,48,16,15,16,48,16,16,16,48,16,48,16,1285,128,64,16,48,16,16,16,15,16,16,16,48,16,16,16,16,15,16,16,16,16,48,16,16,16,48,16,48,16,15,16,48,16,48,16,48,16,48,16,48,16,16,16,16,16,48,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,15,16,16,16,16,16,16,15,49,15,16,16,16,16,16,16,15,16,48,16,16,16,48,16,48,16,16,16,16,15,49,15,16,16,48,16,16,16,48,16,16,16,15,16,16,16,48,16,48,16,16,16,16,15,16,16,16,16,16,15,49,15,49,15,16,16,48,16,48,16,1285,128,64,16,48,16,16,16,16,16,15,16,48,16,16,16,16,16,16,15,16,16,48,16,16,16,48,16,48,16,16,16,48,16,48,16,48,16,48,16,48,16,15,16,16,16,48,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,48,16,15,16,16,16,48,16,16,16,16,15,49,15,16,16,16,16,16,16,15,16,48,16,16,16,48,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,48,16,16,16,48,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,15,16,16,16,16,16,16,15,16,48,16,48,16,16,16,16,16,16,15,16,16,16,16,16,16,15,16,16,16,16,16,16,15,49,15,49,15,16,16,16,16,16,15,16,16,16,16,16,16,15,16,3600>
with thanks

 

Hi there, this has had 56 views but no suggestions yet! I'd really appreciate a hand with this as it is the last piece in a lengthy puzzle and should be easy for someone with the right knowledge.... Please

 

For a start, i think a resident script would be needed here to manage the tcp connection, i expect the global cache only allows one tcp connection at a time, if you were to open the tcp connection from an event script/s you may end up with issues.
Then you would probably need an internal udp server to pass messages from the event script/s to the resident script which would then send the command to the tcp socket.

the protocol looks pretty straight forward you would need to format your string with /r (CR) on the end
eg -- sendir,1:1,1,36764,1,1.............,3600/r

i don't have any global cache to test on so cant test or confirm any code will work properly etc. but to open a tcp connection try the below in resident script

Code:

host, port = "192.168.1.20", 4998

sock = require("socket")

if not TCP_Client then
TCP_Client = assert(sock.tcp())
TCP_Client:connect(host, port);
TCP_Client:settimeout(1);
end

if not udp_server then
  -- local UDP server on port 9876
  udp_server = require('socket').udp()
  udp_server:settimeout(1)
  udp_server:setsockname('127.0.0.1', 9876)
    log("Udp Server: Received message")
end

cmd = udp_server:receive()
if cmd then
TCP_Client:send(cmd)
end

-- if you want to receive reply from connection
rx = TCP_Client:receive()

if rx then
log(rx)
end

and to send from event script

Code:

cmd = 'sendir,1:1,1,36764,1,1.............,3600/r '
  require('socket').udp():sendto(cmd, '127.0.0.1', 9876)

 

thank you very much Pie Boy.... I have not got it to work yet but will keep fiddling. However, I did not mention that I will be using 3 Global Cache units. Does this mean 3 resident scripts or would you recommend a different approach?

 

separately, might there be something missing from this line? (ie IP and port?)
TCP_Client:send(cmd)

 

It will send it to the ip address bound to the tcp object, I didn’t mention but you will need to change the ip address and port args to match your global cache in the first line.

 

Hi Pie Boy,

I found another post on this referring to using TCP connection direct from an event script which I now have working - https://www.cbusforums.com/threads/ir-blaster-for-shac-nac-success-using-global-cache-ip2ir.10173/
you mentioned a concern about using TCP in an event script - can you expand on that?

 

Yes, basically each time an event script runs it creates a new instance of the script
so you can have many scripts running in parallel if the event script were to happen to be triggered sequentially.
eg send ir vol up a few times etc

if this situation were to happen the first instance of event script would happily open the tcp connection and send the command but the next instance/s may not be able to open the tcp connection etc, it may also cause the tcp connection on the global cache side to become un-responsive/flooded with messages.

if you could stick your working code in a resident script with the udp server passing the messages from the event script to the resident script that would be best in my opinion, change ip and port to suit and use the

Code:

cmd = 'sendir,1:1,1,36764,1,1.............,3600/r '
  require('socket').udp():sendto(cmd, '127.0.0.1', 9876)

to send the command from event script, test you have output to the log, then un comment the tcp bits below bit etc,

you may need to start and stop the resident script for it to take effect.

Code:

-- resident script 
local socket = require("socket")
local tcp = assert(socket.tcp())

if not udp_server then
  -- local UDP server on port 9876
  udp_server = require('socket').udp()
  udp_server:settimeout(1)
  udp_server:setsockname('127.0.0.1', 9876)
    log("Udp Server: Created and ready")
end

cmd = udp_server:receive()
if cmd then
  log(cmd)
 
 -- tcp:connect("192.168.0.181", 4998);

--sony tv power toggle
 -- tcp:send(cmd)

os.sleep(.1)

--tcp:close()
 
end

 

But why using IR and not exploring full 2 way control, with real time feedback? there are working solutions for that, with driver ready in SHAC....

 

I could not find anything in the SHAC + I had a figure 8 to each of my 8 indoor units from a central position. Using IR via Global cache IP2IR was the best solution I could find and it is working well.