150 likes | 274 Views
Network Connected Devices. Joseph Ngari| Program Manager. Easily connect and control your network devices. What are UPnP and PnP-X. About UPnP. It enables a standards based discovery and communication solution for network connected devices. UPnP in a nutshell. Device must implement http
E N D
Network Connected Devices Joseph Ngari| Program Manager
About UPnP • It enables a standards based discovery and communication solution for network connected devices.
UPnP in a nutshell • Device must implement http • Discovery (SSDP) • Windows initiates multicast on port 1900 which contains special tag: M-SEARCH. • Device responds via unicast with URL to a device description document (DDD) • Host downloads the DDD from the URL • The DDD has pointers to the Service Control Protocol Description (SCPD) , eventing and presentation URLs. These additional services are not needed for discovery. • Learn More: http://www.upnp.org/
PnP-X • Very easy. Its one xml tagin the DDD • <pnpx:X_hardwareId>Microsoft/SampleDevice/10000/urn:microsoft-com:device:SampleDimmerDevice:1</pnpx:X_hardwareId> • Enables an enhanced pairing experience with windows. • Only have to provide a PnP-X hardware ID and the device type. • This lives in the DDD we covered above. • If you don’t use a PnP-X ID you will not be able to get connected.
Device meta-data uses PnP-X ID • This goes in your DDD • <pnpx:X_hardwareId>Microsoft/SampleDevice/10000/urn:microsoft-com:device:SampleDimmerDevice:1</pnpx:X_hardwareId> • You then add the ID to the meta-data as shown below. The prefix will be added by the device meta-data wizard.
Device Presence • Device has a dev node once it is paired and regardless of whether the device is connected. • Windows keeps track of presence. • Device should send periodic “alive” messages. • Device should send “byebye” before it disconnects otherwise the PC will think the device is still connected for up to 30 minutes.
Retrieving the device • Device enumeration • Once you get the IP address you can use any desired communication protocol. • We recommend UPnP. • No need to invent a new protocol. • Enables anyone to talk to your device. • Will not conflict with other operating systems
Using the device • Get the Service Control Protocol Description (SCPD) • Invoke actions • Subscribe for events • SOAP • UPnP uses soap to communicate • Additional Resources
Automatic Connection • Network Connected Device Automatic Setup (NCD-AS) • Requirements • Must be on a private networkand sharing must be enabled. • Must have less than 30 number of devices on the network. • This includes all devices and not just UPnP devices. • Must fit into specific device categories • General rule is that it is a shared device in the home • Device category must be correct. This optional PnP-X tag describes the device category. <pnpx:X_deviceCategory>HomeAutomation</pnpx:X_deviceCategory>
Resources • Windows Rally • UPnP • Dimmer Sample