Control AC using Virtual Thermostat temperature

luup_ac_control.lua

-- Get Virtual Thermostat here: http://forum.micasaverde.com/index.php?topic=8363.0

local lul_vdev_thermostat = 48
local lul_dev_sensor = 43
local lul_dev_ac = 37
local DEFAULT_COOL_SP = 26
-- Desired temperature mode in Virtual Thermostate
local modeStatus = luup.variable_get ("urn:upnp-org:serviceId:HVAC_UserOperatingMode1", "ModeStatus", lul_vdev_thermostat)
-- Desired temperature set in Virtual Thermostate
local coolSp = tonumber (luup.variable_get ("urn:upnp-org:serviceId:TemperatureSetpoint1_Cool", "CurrentSetpoint", lul_vdev_thermostat), 10) or DEFAULT_COOL_SP
-- Current temperature from the sensor
local currentTemperature = tonumber (luup.variable_get ("urn:upnp-org:serviceId:TemperatureSensor1", "CurrentTemperature", lul_dev_sensor), 10)
-- Device Switch state
local switchOnOff = luup.variable_get("urn:upnp-org:serviceId:SwitchPower1", "Status", lul_dev_ac)

luup.log("---------- AC switch using Virtual Thermostat -----------")

luup.log("Virtual Thermostate mode: " .. modeStatus)
luup.log("Virtual Cool point set: " .. coolSp)
luup.log("Current temperature: " .. currentTemperature)

-- Check of the Virtual Thermostate mode, it must be "CoolOn"
if (modeStatus ~= "CoolOn") then
	luup.log("Thermostate mode is not in CoolOn mood. Returning...")
	return False
end

-- Check for temperature
if (currentTemperature > coolSp) then
	-- Temperature is higher than desired, so need to turn on the device
	luup.log("Temperature is higher than cool set point. Turning on the device...")

	-- Checking device switch state, if it's off
    if (switchOnOff == "0") then
      luup.call_action("urn:upnp-org:serviceId:SwitchPower1", "SetTarget", {newTargetValue = "1"}, lul_dev_ac)
    end

elseif (currentTemperature <= coolSp) then
	-- Temperature is lower than the desired, so need to turn off the device
	luup.log("Temperature is lower than cool set point. Turning off the device...")

	-- Checking device switch state, if it's on
    if (switchOnOff == "1") then
      luup.call_action("urn:upnp-org:serviceId:SwitchPower1", "SetTarget", {newTargetValue = "0"}, lul_dev_ac)
    end
end

luup.log("-- EOF: AC using Virtual Thermostate -----------")