Poller to ID

[vespino]

I never noticed the “http poller” before and I was wondering if it might be a good idea to directly set a value of a device with the value found in the url instead of using a LUA script. Just a thought.

[waltervl]

Yes that is very well possible altough if your current lua scripts runs why change?
Only if the http call is slow it will not stall the event system-when using HTTP Poller as it is in a separate system.
But you could also use the async openURL function in DzVents for this.

[vespino]

I’m not using LUA at the moment, I’m updating using the API which works, but if I can use what’s built in…

[waltervl]

Yes, then start with the http poller.
But only if your device website is showing CSV, JSON or XML data. Else you will have to do some extra scraping.

https://www.domoticz.com/wiki/HTTP/HTTPS_poller

[vespino]

But my point is: I would like to NOT use LUA and simply import the URL output in a device specified with an ID. This is currently not possible if I read the documentation correctly.

[waltervl]

That is not how it works, see the Wiki.

It is a plugin or an integration that already connects to the website.
Or the HTTP Poller (with a small Lua script), a separate eventscript (Lua, dzvents, python) or some script outside Domoticz that updates a Dummy device with API calls.

[willemd]

But my point is: I would like to NOT use LUA and simply import the URL output in a device specified with an ID. This is currently not possible if I read the documentation correctly.

The lua script needed for the http poller is required but very simple.
It only does the mapping from a field in the API output to a device. Example for a kWh meter below receiving two values below.

Code: Select all

-- Read API output
s = request['content'];

-- Extract the values
local a = domoticz_applyJsonPath(s,'.total_power_export_t1_kwh')
local b = domoticz_applyJsonPath(s,'.active_power_w')

-- Post values onto the device
local idxkWh = 3
domoticz_updateDevice(idxkWh,'',-1*b ..";".. a*1000 )

[vespino]

I know it’s very simple, but my thought was it could be even easier and was meant as feature request. I posted on GitHub, but they told me to post it here.

[waltervl]

If it was meant as a enhancement request I would have no idea how somebody could implement this without a serious complex configuration interface.

Every website is different, so a lot of settings to think of to support all possible possibilities.

The current implementation with a small script seems to be the best possible way.

[vespino]

The output value gotten from the URL could only be txt I guess. But I understand this could give difficulties with elaborate devices. I will look into LUA then to keep things centralized and less depended on the API… or maybe not change a thing.