Domoticz

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--[[ 
   get WindmeterDisplay setting using the (async) json call 
   on my (PI3) system it takes on average 0.5 seconds until script comes back with settings 
   So after script was triggered twice (once by device or timer and 2nd time by httpResponse)
]] --

return {
	on = { 
	devices = { 'Your triggerdevice name'} ,
        timer = { 'every 30 minutes' },		-- timer or device to trigger the script. Can be both or one of them 
        httpResponses = { 'windmeterSetting' }	-- When json call is answered it will trigger this
    },
	
    execute = function(domoticz, item)
	local debug = true
	function debug_print(myLine)
		if debug then print("***** getWindmetersetting ****** "  .. myLine) end
	end
		
	local myIP="nnn.nnn.nnn.nnn"   -- your domoticz system IP
	local myPort="nnnn"			-- your domoticz port
	
	local windmeterDisplaylist = {"m/s" ,"kn/h" , "mph" ,	"Knots" , "Beaufort" }
        
        if item.isHTTPResponse then
		debug_print("Triggered by HTTPResponse")
		if (item.ok) then -- statusCode == 2xx
                	local setting = item.json.WindUnit
                	debug_print("Setting value: " .. setting .. " ==>> Wind meter display: " .. windmeterDisplaylist[setting + 1] )				
		end
	else
		debug_print("Triggered by device or timer") 
            	domoticz.openURL({
                url = "http://" .. myIP .. ":" .. myPort .. "/json.htm?type=settings",
                method = "GET",
                callback = "windmeterSetting"
            })
        end
    end
}