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dzVents/examples/calc temp delta.lua

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+--[[
+	Assume you have two temperature sensors and a third dummy sensor that should be the
+	difference of these two sensors (e.g. you want to see the difference between water temperature
+	going into a radiator and the temperature of the water going out of it
+]]--
+
+
+return {
+	active = true,
+	on = {
+		['timer'] = {'every 5 minutes'}
+	},
+	execute = function(domoticz)
+		local inTemp = domoticz.devices('Temp in').temperature
+		local outTemp = domoticz.devices('Temp out').temperature
+		local delta = outTemp - inTemp -- how much did the temperature drop?
+
+		-- update the dummy sensor
+		domoticz.devices('Delta temp').updateTemperature(delta)
+
+	end
+}