Domoticz

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 /usr/local/bin/onkyo --host 192.168.x.x --port 60128 system-power:query | egrep "standby|on" -o

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if devicechanged['Sub']=="On" then
  onkyo_change('subwoofer-temporary-level:-15')
else
  if devicechanged['Sub']=="Off" then
    onkyo_change('subwoofer-temporary-level:8')
  end
end

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'name': 'subwoofer-temporary-level',
   'values': OrderedDict([((-15,
     0,
     12), {'description': 'sets Subwoofer Level -15dB - 0dB - +12dB', 'name': '15db-0db-12db'}),
    ('UP', {'description': 'LEVEL + Key', 'name': 'up'}),
    ('DOWN', {'description': u'LEVEL \u2013 KEY', 'name': 'down'}),
    ('QSTN', {'description': 'gets the Subwoofer Level', 'name': 'query'})])}),

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--[[
Script name      : Onkyo-Get
Trigger type   : TIME

Created by proohu01 https://www.domoticz.com/forum/viewtopic.php?f=17&t=1491&start=20
Also have a look at https://www.domoticz.com/wiki/Control_Onkyo

This LUA script will try to determine the power state of an Onkyo receiver. By default, it runs ones every minute.
A virtual dummy switch in Domoticz will reflect the correct power state when a change in power state is discovered.
--]]

-- Set some local variables
local onkyohostip    = '192.168.0.115'       -- IP address of the Onkyo
local onkyohostport = '60128'             -- Onkyo port number. Default is 60128
local virt_onkyo    = 'Onkyo receiver'   -- The name of the dummy switch in Domoticz used as Onkyo device

local logging      = 'true'            -- Set to true or false to get some (color) logging

-- YOU SHOULD PROBABLY LEAVE EVERYTHING AS IS BELOW THIS POINT

-- Function for more color during logging
function print_color(color, message)
   if (logging == "true") then 
      print('<b style="color:'..color..'">'..message..'</b>')
      -- Usage example: print_color('RED', 'Hello world')

      -- Possible colors are...
      -- GREEN | RED | BLUE | YELLOW | ORANGEY| GOLD | GOLD2 | GREY | WHITE | SUBWHITE | MAGENTA 
      -- LIGHTRED | LIGHTBLUE | TORQUISEBLUE | SPRINGGREEN | GREENYELLOW | PURPLE | SEXHOTPINK
      -- CHOCOLATE | CYAN | IVORY | LIGHTYELLOW | SEXGREEN | SEXTEAL | SEXPINK | SEXBLUE 
   end
end

commandArray = {}

   -- Create a temp file. Execute and parse output to temp file. Read the file into a string. Delete the temp file.
   n = os.tmpname ()
   os.execute ('/usr/bin/onkyo --host '..onkyohostip..' --port '..onkyohostport..' system-power:query | egrep "standby|on" -o > ' .. n)
   for line in io.lines (n) do
      result = line
   end
   os.remove (n)
   
   -- check if the value is valid or has some weird reading
   if (result == 0 or result == nil) then
      print_color('RED', 'Input error. Value is 0 or nil. Skipping this reading')
      return commandArray
   else
      if (result == "standby") and otherdevices[virt_onkyo] == 'On' then
         print_color('GREEN', 'I see that the Onkyo receiver is OFF, now setting the dummy switch to OFF...')
         commandArray[virt_onkyo]='Off'
      end
      if (result == "on") and otherdevices[virt_onkyo] == 'Off' then
         print_color('GREEN', 'I see that the Onkyo receiver is ON, now setting the dummy switch to ON...')
         commandArray[virt_onkyo]='On'
      end
   end

return commandArray

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http://192.168.0.124/onkyo/onkyo.php?command=PWR&params=01

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http://192.168.0.124/onkyo/onkyo.php?command=PWR&params=00

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<?php
    $command = $_GET['command'];
    $params = $_GET['params'];

    $hostname = '192.168.0.115';
    $port = 60128;

    switch ($command)
    {
        case 'PWR':
        case 'AMT':
        case 'SLI':
        case 'TUN':
            $message = '!1' . $command . $params;
            break;
        case 'MVL':
            if ($params > 60)
                exit(1);
            $message = '!1' . $command . strtoupper(str_pad(dechex($params), 2, '0', STR_PAD_LEFT));
            break;
        default:
            exit(1);
    }
    print $message;

    $fp = pfsockopen($hostname, $port);
    $packet = "ISCP\x00\x00\x00\x10\x00\x00\x00" . chr(strlen($message) + 1) . "\x01\x00\x00\x00" . $message . "\x0D";
    fwrite($fp, $packet);
    fclose($fp);
?>

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pi@raspberrypi ~ $ onkyo subwoofer-temporary-level:12
Error: "subwoofer-temporary-level" is not a valid command in zone "main"

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local onkyohostip    = '192.168.1.33'       -- IP address of the Onkyo
local onkyohostport = '60128'                 -- Onkyo port number. Default is 60128

-- function to change settings receiver
 function onkyo_change(command)
 --os.execute('/usr/local/bin/onkyo '..command)
 os.execute('/usr/local/bin/onkyo --host '..onkyohostip..' --port '..onkyohostport..' '..command)
 end

-- turn on the receiver when Kodi starts playing and desktop is not running
if (devicechanged['Kodi Media Center']=="Audio" or devicechanged['Kodi Media Center']=="Video") then
	onkyo_change(Onkyo_Input_Selector_BD)
	--Check if Onkyo device switch in Domoticz is 'Off' now and update it's status to 'On'
	if otherdevices ['Onkyo TX-NR535']=='Off' then
		commandArray ['Onkyo TX-NR535']="On"
	end
end

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local Onkyo_Input_BD_uservar = "('input-selector', ('dvd', 'bd', 'dvd'))"

-- turn the receiver on/off with dummy switch 'Onkyo TX-NR535 '
 if devicechanged['Onkyo TX-NR535']=="On" then
 onkyo_change('system-power:on')
 else
 if devicechanged['Onkyo TX-NR535']=="Off" then
 onkyo_change('system-power:standby')
 end
end

-- turn off the receiver after Kodi sits 'idle' for x many minutes
if (otherdevices['Kodi Media Center'] == 'On' and otherdevices['Onkyo TX-NR535'] == 'On') then
	if timedifference(otherdevices_lastupdate['Kodi Media Center']) > uservariables ['Onkyo_idle_delay']  then
		status = onkyo_status('input-selector:query')
		if status[2]==Onkyo_Input_BD_uservar then
			commandArray['Onkyo TX-NR535']='Off'
			print ("Onkyo receiver is turned off  after ".. uservariables ['Onkyo_idle_delay'].." seconds since last item was played on Kodi media player")
		end
	end
end

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-- function to get information from receiver
 function onkyo_status(command)
  local result = {}
  local output = io.popen ('onkyo '..command)
  for line in output:lines() do
  table.insert(result, line)
 end
 output:close()
 return result
end

--Update listeningmode at Paused or Stop, only when current listeningmode is changed from uservariable
if devicechanged['Kodi Media Center']== ("Paused" or "On") then
	Onkyo_Listeningmode = onkyo_status ('listening-mode:query')
	if uservariables ['KodiStatus']=="Audio" then
		if Onkyo_Listeningmode[2]~= uservariables ['KodiAudioListeningMode'] then
			commandArray ['Variable:KodiAudioListeningMode'] = Onkyo_Listeningmode[2]
			print ('Wijzig KodiAudioListeningMode naar: '.. Onkyo_Listeningmode[2])
		end
	elseif uservariables ['KodiStatus']=="Video" then
		if Onkyo_Listeningmode[2]~= uservariables ['KodiVideoListeningMode'] then
			commandArray ['Variable:KodiVideoListeningMode'] = Onkyo_Listeningmode[2]
			print ('Wijzig KodiVideoListeningMode naar: '.. Onkyo_Listeningmode[2])
		end
	end
end

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-- function to extract the Onkyo 'set' command out of a 'query' command.
-- example: 
-- onkyo input-selector:query results in ('input-selector', ('dvd', 'bd', 'dvd'))
-- the onkyo set command is just 'dvd' or 'bd' (to set it: onkyo input-selector:bd)
function queryTOset (query_mode,query_result)
	local queryToset_result
	-- check if query_mode is part of query_result
	l = string.find (query_result, query_mode,1,true) --print ('L = ' ..l)
	--l = string.match ("('listening-mode', 'direct')", "listening-mode") print ('L = ' ..l)
	if l == nil then
		print ('did not find query mode in query result')
		print ('query_mode is: ' ..query_mode)
		print ('query_result is: ' ..query_result)
		query_result = onkyo_status(query_mode ..':query') print ('no valid query mode found, will use current status of receiver')
		query_result = query_result[2]
	end
	-- query_result starts with "('" (2 characters), followed by the query-mode, followed by "', '" or "', (" (4 characters) Together this is 6 characters before the 'set' string' starts
	querylength = string.len(query_mode)+ 6 -- for 'input-selector' it will be 14+6=20
	-- reduce query_result string and start right away with the first set command, which starts with a ' or ( sign
	queryToset_result = string.sub (query_result,querylength)
	-- find out how many characters the first set command has. example: 'bd' is altogether 4 characters. Find the 1st ' sign
	start_set = string.find (queryToset_result,"\'", 1) print ('start of set command for ' ..query_mode .. ' = '.. start_set ..' character')
	setlength = string.find (queryToset_result,"\'", start_set+1) print ('length of set command for ' ..query_mode .. ' = '.. setlength - start_set + 1 ..' character')
	-- extract first 'set' command out of string
	queryToset_result = string.sub (queryToset_result,start_set,setlength) print ('set command for ' ..query_mode ..' = ' ..queryToset_result)
	return queryToset_result 
 end
 
 --Update the listeningmode, if necesssary, after Kodi started playing with a 3 seconds delay (to allow the 'turn Onkyo' on command to run. The receiver doesn't
	--receive commands when they are sent too close to eachtother. 
if (timedifference(otherdevices_lastupdate['Kodi Media Center']) > 3 and timedifference(otherdevices_lastupdate['Kodi Media Center']) < 15) then
	print('Test kodi last update caught')
	if (devicechanged['Kodi Media Center']=="Audio" or devicechanged['Kodi Media Center']=="Video") then
		--Request current listening mode from receiver
		Onkyo_Listeningmode = onkyo_status ('listening-mode:query')
		--Check if current listening mode matches the one stored in the uservariable
		if (Onkyo_Listeningmode[2] ~= uservariables ['KodiAudioListeningMode'] and otherdevices['Kodi Media Center']=="Audio") then
			--Listening mode doesn't match up: extract 'set' command out of given query result with the following function:
			new_listening_mode = queryTOset ('listening-mode', uservariables ['KodiAudioListeningMode'])
			print ('new listening mode = ' ..new_listening_mode)
			onkyo_change('listening-mode:' ..new_listening_mode)
		elseif (Onkyo_Listeningmode[2] ~= uservariables ['KodiVideoListeningMode'] and otherdevices['Kodi Media Center']=="Video") then
			--Listening mode doesn't match up: extract 'set' command out of given query result with the following function:
			new_listening_mode = queryTOset ('listening-mode', uservariables ['KodiVideoListeningMode'])
			print ('new listening mode = ' ..new_listening_mode)
			onkyo_change('listening-mode:' ..new_listening_mode)
		end
	end
end