No Control for Signage Displays

[chrisgilldc]

Hi everybody. My office has me investigating a couple TVs for a large installation here. One is the Samsung QB65H-N, one of their commercial panels, and we'd hope it would be network controllable.

Sadly, not so much.

samsungctl looks promising, but doesn't seem to interface with the screen at all. It can get it up on the network, and an nmap reveals this:

Starting Nmap 7.40 ( https://nmap.org ) at 2019-09-16 12:38 EDT
Nmap scan report for 192.168.1.209
Host is up (0.0045s latency).
Not shown: 65531 closed ports
PORT      STATE SERVICE
1515/tcp  open  ifor-protocol
9197/tcp  open  unknown
38485/tcp open  unknown
40000/tcp open  safetynetp

Nmap done: 1 IP address (1 host up) scanned in 5.26 seconds

Okay, potentially promising. However, none of those ports responds to samsungctl for either legacy or websocket control. If I curl them, I only get a SOAP reply on port 9197.

$ curl http://192.168.1.209:9197
<?xml version="1.0"?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><s:Fault><faultcode>s:Client</faultcode><faultstring>UPnPError</faultstring><detail><UPnPError xmlns="urn:schemas-upnp-org:control-1-0"><errorCode>402</errorCode><errorDescription>Invalid Args</errorDescription></UPnPError></detail></s:Fault></s:Body>

This seems to tell me this unit just doesn't support the type of control samsungctl does? Or is there some magic dance I need to do to enable it? Any guidance is appreciated. Our other option is an LG unit that supports SNMP (yay) but requires an NDA to get any documentation on it (BOO!)

[mStirner]

This could be a UPNP API (Assuming on the xml tags)
Have you tried to control the panel via a UPNP software/requests ?
Some UDP Broadcasts from that display?

Also what are you want to do with the Smart Signage panel ?
They can be controlled via "MagicInfo Server" from samsung.
Perhaps you can do some reverse engineering...?

[jhfin]

Hi! I had the same issue with my home info display (Samsung QB13R-T). I tried also the free (up to 25 devices) "Magicinfo Server" but that didn't seem to fit my purpose. Samsung has actually quite good documentation on MDC protocol and I ended up using that one to control my display power state. If you're interested in more details, I have written a blog post about this:

https://jb1c.blog/2020/07/08/controlling-samsung-signage-qb13r-t-based-on-unifi-protect/