CEC TV power status

---

hi guys,

i send a cec request for the power status to the TV

echo "pow 0" | cec-client -s

and get this answer:

DEBUG:   [              67]     unregistering all CEC clients
DEBUG:   [              68]     Broadcast (F): osd name set to 'Broadcast'
DEBUG:   [              68]     InitHostCEC - vchiq_initialise succeeded
DEBUG:   [              68]     InitHostCEC - vchi_initialise succeeded
DEBUG:   [              68]     InitHostCEC - vchi_connect succeeded
DEBUG:   [              70]     logical address changed to Free use (e)
DEBUG:   [              70]     Open - vc_cec initialised
NOTICE:  [              70]     connection opened
DEBUG:   [              71]     processor thread started
DEBUG:   [              71]     << Broadcast (F) -> TV (0): POLL
DEBUG:   [              71]     initiator 'Broadcast' is not supported by the CEC adapter. using 'Free use' instead
TRAFFIC: [              72]     << e0
DEBUG:   [             137]     >> POLL sent
DEBUG:   [             137]     TV (0): device status changed into 'present'
DEBUG:   [             137]     << requesting vendor ID of 'TV' (0)
TRAFFIC: [             137]     << e0:8c
TRAFFIC: [             329]     >> 0f:87:00:00:f0
DEBUG:   [             330]     >> TV (0) -> Broadcast (F): device vendor id (87)
DEBUG:   [             330]     TV (0): vendor = Samsung (0000f0)
DEBUG:   [             330]     expected response received (87: device vendor id)
DEBUG:   [             330]     replacing the command handler for device 'TV' (0)
NOTICE:  [             330]     registering new CEC client - v2.2.0
DEBUG:   [             331]     detecting logical address for type 'recording device'
DEBUG:   [             331]     trying logical address 'Recorder 1'
DEBUG:   [             331]     << Recorder 1 (1) -> Recorder 1 (1): POLL
TRAFFIC: [             331]     << 11
TRAFFIC: [             421]     << 11
DEBUG:   [             511]     >> POLL not sent
DEBUG:   [             512]     using logical address 'Recorder 1'
DEBUG:   [             512]     Recorder 1 (1): device status changed into 'handled by libCEC'
DEBUG:   [             512]     Recorder 1 (1): power status changed from 'unknown' to 'on'
DEBUG:   [             512]     Recorder 1 (1): vendor = Pulse Eight (001582)
DEBUG:   [             512]     Recorder 1 (1): CEC version 1.4
DEBUG:   [             512]     AllocateLogicalAddresses - device '0', type 'recording device', LA '1'
DEBUG:   [             512]     logical address changed to Recorder 1 (1)
DEBUG:   [             512]     Recorder 1 (1): osd name set to 'CECTester'
DEBUG:   [             513]     Recorder 1 (1): menu language set to 'eng'
DEBUG:   [             513]     GetPhysicalAddress - physical address = 1000
DEBUG:   [             513]     AutodetectPhysicalAddress - autodetected physical address '1000'
DEBUG:   [             513]     Recorder 1 (1): physical address changed from ffff to 1000
DEBUG:   [             513]     << Recorder 1 (1) -> broadcast (F): physical adddress 1000
TRAFFIC: [             513]     << 1f:84:10:00:01
NOTICE:  [             664]     CEC client registered: libCEC version = 2.2.0, client version = 2.2.0, firmware version = 1, logical address(es) = Recorder 1 (1) , physical address: 1.0.0.0, host: armv7l-unknown-linux-gnueabihf, features: 'P8 USB' 'P8 USB detect' 'RPi' 'EXYNOS', compiled on: Tue Nov  4 00:38:22 UTC 2014 by pbuilder@mgorven-pc.thefacebook.com on Linux 2.6.32 (armv7l)
DEBUG:   [             664]     << Recorder 1 (1) -> TV (0): OSD name 'CECTester'
TRAFFIC: [             664]     << 10:47:43:45:43:54:65:73:74:65:72
DEBUG:   [             964]     << requesting power status of 'TV' (0)
TRAFFIC: [             965]     << 10:8f
TRAFFIC: [            1108]     >> 01:90:00
DEBUG:   [            1108]     >> TV (0) -> Recorder 1 (1): report power status (90)
DEBUG:   [            1109]     TV (0): power status changed from 'unknown' to 'on'
DEBUG:   [            1109]     expected response received (90: report power status)
power status: on
DEBUG:   [            1110]     unregistering all CEC clients
NOTICE:  [            1110]     unregistering client: libCEC version = 2.2.0, client version = 2.2.0, firmware version = 1, logical address(es) = Recorder 1 (1) , physical address: 1.0.0.0, host: armv7l-unknown-linux-gnueabihf, features: 'P8 USB' 'P8 USB detect' 'RPi' 'EXYNOS', compiled on: Tue Nov  4 00:38:22 UTC 2014 by pbuilder@mgorven-pc.thefacebook.com on Linux 2.6.32 (armv7l)
DEBUG:   [            1110]     Recorder 1 (1): power status changed from 'on' to 'unknown'
DEBUG:   [            1110]     Recorder 1 (1): vendor = Unknown (000000)
DEBUG:   [            1110]     Recorder 1 (1): CEC version unknown
DEBUG:   [            1110]     Recorder 1 (1): osd name set to 'Recorder 1'
DEBUG:   [            1110]     Recorder 1 (1): device status changed into 'unknown'
DEBUG:   [            1110]     unregistering all CEC clients
DEBUG:   [            2072]     UnregisterLogicalAddress - releasing previous logical address
DEBUG:   [            2073]     logical address changed to Broadcast (f)

How can i parse this message to find the string "power status: ". (on or off)
any ideas?

thanks
dk00000

@dk00000 Are you aware of the following page?

https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=53481

@mwittig
yes, i know this page. good information for the first start.

this is my config:

{
      "class": "VariablesDevice",
      "id": "variable_tv",
      "name": "TV",
      "variables": [
        {
          "name": "powerstatus",
          "expression": "echo \\\"pow 0\\\" | cec-client -s -d 1",
          "type": "string"
        }
      ]
    },

and this is the error message

22:18:28.740 [pimatic] error: Could not get attribute value of TV.powerstatus: Could not parse expression
22:18:28.754 [pimatic] warn: Could not update variable variable_tv.powerstatus: Could not parse expression

whats wrong?

if i enter it at the command line i get:

~ $ echo "pow 0" | cec-client -s -d 1
opening a connection to the CEC adapter...
power status: on

@dk00000
guess you escaped too much.

try this expression instead "expression": "echo \"pow 0\" | cec-client -s -d 1",

@leader21

nope. same error message

09:03:40.949 [pimatic] error: Could not get attribute value of TV.powerstatus: Could not parse expression
09:03:41.134 [pimatic] warn: Could not update variable variable_tv.powerstatus: Could not parse expression

I got it working with:

{
"id": "tv-status",
"name": "TV Status",
"class": "ShellSensor",
"attributeName": "tv-status",
"attributeType": "string",
"attributeUnit": "",
"command": "echo 'pow 0' | cec-client -s -d 1 | grep power | awk '{ print $3 }'",
"interval": 60000
},

Hope this helps!

@Dr_Roelski
it works!
But now i have a lot of messages in log:

15:41:02.684 [pimatic] warn: Could not update variable tv-status.tv-status: Error getting attribute vale for TV Status: tvservice-client: Failed to connect to TV service: -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.684 [pimatic] warn:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.684 [pimatic] warn:>
15:41:02.707 [pimatic] error: Could not get attribute value of TV Status.tv-status: Error getting attribute vale for TV Status: tvservice-client: Failed to connect to TV service: -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_logical_addr length 12, error code -1
15:41:02.707 [pimatic] error:>cecservice-client: CEC failed to send command set_passive length 4, error code -1
15:41:02.707 [pimatic] error:>

Is running:

echo ‘pow 0’ | cec-client -s -d 1 | grep power | awk ‘{ print $3 }’

in a shell running o.k.?

I did see the error once myself, but only at startup.
I do suspect the cec script of interfering with kodi (I’m running on pi2 with xbian) which also has cec support. Had some hangups while watching movie.

Yap thats the next issue i have. Cec feature from kodi vs. Cec feature i installed in raspian.
If i start kodi then the tv recognizes kodi. If i then send a command via pimatic then the kodi-cec-connection will be disconnected and the tv connects to the raspian-cec-script. But how do i disconnect this connection and reconnect to kodi? My current workarround is to restart the kodi service. Its not really comfortable.
Any ideas?

Well, for me it ends here.
I can also ping my tv and denon amp, so I will use that to determine further switch actions.
Still, if you don’t run kodi you can use the method mentioned here and maybe someone will find a way to use both at the same time.