This command is accessed using an HTTP GET. Returns a map of all the channels installed on the Roku device paired with their application ID. Once you have the Roku device IP address, you can issue the following external control service commands to the Roku device. The external control services provided by ECP are included in a simple RESTful API accessed using HTTP on port 8060. It is safe to assume the unit is no longer available if you have not received a new NOTIFY message before the Cache-Control max-age time expires. Roku devices multicast NOTIFY messages periodically (approximately every 20 minutes). That means that, for example, the Location header may begin with either "Location:" or "LOCATION:" or "location:", and so forth. When parsing headers in the response, in accordance with the UPnP Device Architecture specification, field names should not be treated as case sensitive. We recommend you let the user assign names to the USNs. Your program could keep a map of USNs to location URLs, and allow the user to select which Roku device on the network to control. Note that if there are multiple Roku devices in your local area network, you will get multiple responses. The Roku device serial number is contained in the USN line after uuid:roku:ecp. You can parse out the URL for the Roku device external control services from the Location header. If you get a 200 status response, the Location header is valid. To query for a Roku device IP address, send the following HTTP request to 239.255.255.250 port 1900:
The Roku device responds to M-SEARCH queries on this IP address and port. There is a standard SSDP multicast address and port (239.255.255.250:1900) used for local area network communication.
Roku devices advertise their external control services using the multicast SSDP so that programs can discover the IP address of Roku devices in the area. SSDP is an industry IETF standard network protocol for discovery of local area network services. ECP is a simple RESTful API that can be accessed by programs in virtually any programming environment. The Roku devices offering these external control services are discoverable using SSDP (Simple Service Discovery Protocol).
The External Control Protocol (ECP) enables a Roku device to be controlled over a local area network by providing a number of external control services. launch parameters for the Roku TV Tuner app (channel ID tvinput.dtv).launch parameters for the Channel Store app (channel ID 11).SSDP (Simple Service Discovery Protocol).
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