Domoticz

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return {
	on = {
		timer = { 'at *:06', 'at *:32','at 14:21'},
		httpResponses = { 'getip' } -- matches callback string below
	},
	
    execute = function(domoticz, triggerItem)
    local WanIp = domoticz.devices('WanIp')  -- this is a virtual text sensor I created for this script so I can see the IP address
    local prevWanIP = tostring(WanIp.text) -- here we read the current content of the text sensor

		if (triggerItem.isTimer) then
			domoticz.openURL({
				url = 'https://ifconfig.co/json',
				method = 'GET',
				callback = 'getip'
			})
			
		elseif (triggerItem.isHTTPResponse) then

	local response = triggerItem
		if (response.ok and response.isJSON) then
		local dirIP = tostring(response.json.ip)
		if dirIP ~= nil and dirIP ~= prevWanIP then  --check if the current IP is different from what is currently stored in the text sensor
		    dirIP = tostring(dirIP) --convert to string (just in case it is read as other type
	    	    WanIp.updateText(dirIP) --update the text sensor with the new IP
		--here you can add the action you want, I send the IP via telegram to my phone and update dyndns
		end

			else
				print('**getip failed to fetch info')
			end
		end
	end
}