External switch (i.e. web JSON)

Plugins & Plugin Development Program Logic (PLEG)
1

Hi,

Is it possible to make an input that checks a web-page for on/off status - and from that create condition/actions ?

I am thinking something like this :

Input (trigger) checks a webpage (i.e. www.example.com/switch.php) - JSON-response could be “switch:0” or “switch:1”. This trigger is then used in a condition.

Thanks,
Martin

2

Yes it is possible. You can use luup.inet_wget(url) for this. See [url=http://wiki.micasaverde.com/index.php/Luup_Lua_extensions#function:_wget]http://wiki.micasaverde.com/index.php/Luup_Lua_extensions#function:_wget[/url]

If you know that the remote device will always return the same structure, you could use Lua’s string.match(…) function to capture the variable rather than parse the whole of the json.

3

Brilliant. Thanks :slight_smile:

4
  • okay - next question :wink: …

I have created a scene that runs every 5 mins. to check a URL for a switch-state.
Can this state be used as a trigger directly in PLEG, or should I use luup-code in the same scene to create the wanted action?

I don’t know luup-code very well, so could someone give me an example on how to switch a fibaro-switch on/off using luup??

Thanks!,
Martin

5
I have created a scene that runs every 5 mins. to check a URL for a switch-state. Can this state be used as a trigger directly in PLEG, or should I use luup-code in the same scene to create the wanted action?

PLEG cannot read status or variables from a scene. You could set a state variable in some device and PLEG could see that as a Device Property. Otherwise use a real or virtual switch. PLEG can simply use that as a Trigger. The code to turn a switch on would be:

local dID = 123 -- Set to your switch device number luup.call_action("urn:upnp-org:serviceId:SwitchPower1","SetTarget",{newTargetValue="1"},dID)

or to turn it off:

local dID = 123 -- Set to your switch device number luup.call_action("urn:upnp-org:serviceId:SwitchPower1","SetTarget",{newTargetValue="0"},dID)

6

Thanks - much appreciated!

/Martin