Check the status of television in LM3!

[phongvucba]

please help me!
Hope everyone has opinions to this problem   !
To determine the status of television, we use the TCP protocol. If the TV is on, the status will return to 1, otherwise it will be empty:
  sock = socket.tcp ()
   sock: setTimeout (1)
status = sock: connect ('100.100.100.92', 55000)
if status == 1 then     --- Tivi on
....v...v....
But there are some television via TCP is impossible. turn off the TV when the status remains 1.
In this case, the TCP protocol can not be used anymore. If anyone has encountered this case (Sony TV) and there are workarounds, please help me.

I am very thankful.! 

[Erwin van der Zwart]

Hi,

When NIC is turned off in stand-by we use a chromecast in a HDMI port 
and we send a command to the device that causes the tv to turn on again.

From there you can use normal NIC again (:

This is a € 35,- solution 

BR,

Erwin van der Zwart

[phongvucba]

Hi,

When NIC is turned off in stand-by we use a chromecast in a HDMI port 
and we send a command to the device that causes the tv to turn on again.

From there you can use normal NIC again (:

This is a € 35,- solution 

BR,

Erwin van der Zwart
==============================================
I mean, when the TV is in standby mode (or sleep), the NIC still on (value 1) I want NIC = 0. from which we determine when to turn on the tv (tv on the NIC = 1).
"We use a HDMI port in a chromecast", you can specify how to do it? Thank you so much!
Who are somehow via USB, HDMI, UDP, TCP another, which can identify the TV on and off. Can guide me?
Thank so much! everyone!

[Erwin van der Zwart]

Hi Phongvucba.

Here is a script example for controlling Chromecast:

Code:

-- ****** Control Chromecast with 1 byte object version 1.0 created by Erwin van der Zwart ******* --
-- **************************************** SET PARAMETERS *************************************** --

-- Chromecast IP address
ip_chromecast = '192.168.10.23'

-- Additional info from browser about
-- http://192.168.10.23:8008/ssdp/device-desc.xml
-- http://192.168.10.23:8008/setup/scan_results
-- http://192.168.10.23:8008/setup/eureka_info?options=detail
-- http://192.168.10.23:8008/setup/supported_timezones
-- http://geeknizer.com/how-chromecast-works-chromecast-protocol-explained/

value = event.getvalue()

require 'socket.http'

function control_chromecast(uri, request)
 local request_body = request
 local response_body = { }
 local res, code, response_headers = socket.http.request
 {
   url = "http://" .. ip_chromecast .. ":8008/" .. uri;
   method = "POST";
   headers =
   {
     ["Content-Type"] = "application/x-www-form-urlencoded";
     ["Content-Length"] = #request_body;
   };
   source = ltn12.source.string(request_body);
   sink = ltn12.sink.table(response_body);
 }
 return res, code, response_headers
end

-- Action on value 1
if value == 1 then
    -- Start Youtube video
    res, code, response_headers = control_chromecast('apps/YouTube', [[v=_iuBO1lkch8]])
end

-- Action on value 2
if value == 2 then
    -- Stop Youtube video
    res, code, response_headers = control_chromecast('apps/YouTube', [[DELETE]])
end

-- Action on value 3
if value == 3 then
    -- Start Chromecast Homescreen
    res, code, response_headers = control_chromecast('apps/ChromeCast', [[]])
end

-- Log results
resulthandling = false

if resulthandling == true then
 -- Handler for results
 log("Status:", res and "OK" or "FAILED")
 log("HTTP code:", code)
 log("Response headers:")
 if type(response_headers) == "table" then
   for k, v in pairs(response_headers) do
     log(k, ":", v)
   end
 else
   -- Would be nil, if there is an error
   log("Not a table:", type(response_headers))
 end
 log("Response body:")
 if type(response_body) == "table" then
   log(table.concat(response_body))
 else
 end
end

BR,
Erwin

[phongvucba]

Hi Phongvucba.

Here is a script example for controlling Chromecast:

Code:

-- ****** Control Chromecast with 1 byte object version 1.0 created by Erwin van der Zwart ******* --
-- **************************************** SET PARAMETERS *************************************** --

-- Chromecast IP address
ip_chromecast = '192.168.10.23'

-- Additional info from browser about
-- http://192.168.10.23:8008/ssdp/device-desc.xml
-- http://192.168.10.23:8008/setup/scan_results
-- http://192.168.10.23:8008/setup/eureka_info?options=detail
-- http://192.168.10.23:8008/setup/supported_timezones
-- http://geeknizer.com/how-chromecast-works-chromecast-protocol-explained/

value = event.getvalue()

require 'socket.http'

function control_chromecast(uri, request)
 local request_body = request
 local response_body = { }
 local res, code, response_headers = socket.http.request
 {
   url = "http://" .. ip_chromecast .. ":8008/" .. uri;
   method = "POST";
   headers =
   {
     ["Content-Type"] = "application/x-www-form-urlencoded";
     ["Content-Length"] = #request_body;
   };
   source = ltn12.source.string(request_body);
   sink = ltn12.sink.table(response_body);
 }
 return res, code, response_headers
end

-- Action on value 1
if value == 1 then
    -- Start Youtube video
    res, code, response_headers = control_chromecast('apps/YouTube', [[v=_iuBO1lkch8]])
end

-- Action on value 2
if value == 2 then
    -- Stop Youtube video
    res, code, response_headers = control_chromecast('apps/YouTube', [[DELETE]])
end

-- Action on value 3
if value == 3 then
    -- Start Chromecast Homescreen
    res, code, response_headers = control_chromecast('apps/ChromeCast', [[]])
end

-- Log results
resulthandling = false

if resulthandling == true then
 -- Handler for results
 log("Status:", res and "OK" or "FAILED")
 log("HTTP code:", code)
 log("Response headers:")
 if type(response_headers) == "table" then
   for k, v in pairs(response_headers) do
     log(k, ":", v)
   end
 else
   -- Would be nil, if there is an error
   log("Not a table:", type(response_headers))
 end
 log("Response body:")
 if type(response_body) == "table" then
   log(table.concat(response_body))
 else
 end
end

BR,
Erwin

Thank you very much !
I have the following code, via UDP:
sock = socket.udp ()
    sock: setTimeout (1)
status = sock: connect ('192.168.10.10', 5353)
== 1 if status bars --- TV on
--tivi else off
Similar to TCP, the code is correct?
thank so much

[Habib]

Hi Erwin,

it would be nice if you can post an example for this three commands.

TV Off, TV On and TV State

I've read a little bit about the dial protocol, but I don't want to control apps on the chromecast. I want to integrate this commands written above in my scene/device controls.

Thx4forwards :-)