Reacting to the network arrival and departure of "roaming" devices
There is a plugin called H4P_GateKeeper. Your sketch lists identifying fatures of specifc devices, for example your mobile phone, a family member's laptop etc.
The H4P_GateKeeper emits an H4PE_PRESENCE event whenever one of the named roaming devices enters (msg==1) or leaves (msg=0) the network.
This can be used for example to implement a self-arming alarm system which will switch on whenever your personal phone leaves the network and switches off when your phone is detected again as you arrive back home. It could turn on the outsiude lights at the same time when it is dark.
See Youtube video: 13: Target in Range!: Network Presence Detection
| Type of device | Identifying features | Example | H4Plugins "Roamer" type |
|---|---|---|---|
| any | IP address | 192.168.1.42 | h4pRoamingIP |
| UPNP device | UPNP Tag, value | USN,uuid:Socket-1_0-upnpF9198B | h4pRoamingUPNP |
| MDNS (.local) device | protocol / service attributes | tcp,http | h4pRoamingDotLocal |
| H4 device | device name | bedroom | h4pRoamingH4 |
(c) 2021 Phil Bowles [email protected]