Domoticz

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 return {
	on = {
		timer = { 'every 5 minutes' },
		httpResponses = { 'blitz' } -- matches callback string below
	},
        data = {
            last = { initial = 0 }
        },
	
	execute = function(domoticz, triggerItem)
	   local lightning = domoticz.devices('Bliksemteller')
	   local preLight = tonumber(lightning.rawData[1])

		distance = function(lat1, lng1, lat2, lng2)
		radius = 6371
		dLat = (lat2 - lat1) * math.pi / 180
		dLng = (lng2 - lng1) * math.pi / 180
		lat1 = lat1 * math.pi / 180
		lat2 = lat2 * math.pi / 180
		val = math.sin(dLat / 2) * math.sin(dLat / 2) + math.sin(dLng / 2) * math.sin(dLng / 2) * math.cos(lat1) * math.cos(lat2)
		ang = 2 * math.atan2(math.sqrt(val), math.sqrt(1 - val))
		return radius * ang
		end
		
		local latHome = 51.860069  --replace with your own coordenates
		local lngHome = 4.4122027  --replace with your own coordenates
		local distanceRange = 10   --change to the maximum distance you want for filtering (in KMs)
		local last = tonumber(domoticz.data.last)
		if (triggerItem.isTimer) then
			domoticz.openURL({
				url = 'https://www.onweeractueel.nl/domoticz_bo.json',
				method = 'GET',
				callback = 'blitz'
			})
		elseif (triggerItem.isHTTPResponse) then

	local response = triggerItem
		if (response.ok and response.isJSON) then
			local value = 0
			local ignored = 0
			tl = #response.json
			tc = 1
			repeat
			local times = tonumber(response.json[tc][1])
			local lat = tonumber(response.json[tc][2])
			local lng = tonumber(response.json[tc][3])
			local distanceBetween = distance(latHome, lngHome, lat, lng)
			 if (distanceBetween <= distanceRange) then
				if (times > last) then
				 value = value + 1
				else
				 value = 0
				end
			  domoticz.data.last = times
			 end
			tc = tc + 1
			until tc > tl
			print('Blitz Value = '..value)
			if value ~= preLight then
			lightning.updateCustomSensor(value)
	        end
			else
				print('**blitz failed to fetch info')
			end
		end
	end
}