Luup Lua extensions

In addition to the [Lua] commands described in the [Lua reference manual], you can also reference in your Lua code global variables the Luup engine provides, or call functions and hooks within the Luup engine, and use local variables which the Luup engine may pass to your Lua code depending on what kind of Lua code you wrote:

Global Variables

The Luup engine provides the following global variables that can be referenced anywhere in your Lua code:

lug_device

This is a table containing information on all the devices in the system. The index is the device number. See: Lua_Device_Structure for details. Each device has the following attributes:

Room_Num: This is the number of the room the device is in.

DeviceType: This is a number representing the type of device. See: Luup_Device_Types_Categories for a list.

Category_Num: This is a category for the device. See: Luup_Device_Types_Categories

Device_Num_Parent: This is the number of the parent device. See: Lua_Device_Structure for details.

IP: If this device is IP based, this is the IP address.

MAC: If this device is IP based, this is the MAC address.

ID: If this device has an internal ID that is specific to the device, it is contained here. For example, for Z-Wave devices this is the Node ID, and for Insteon device it is the Insteon ID.

Description: This is the text description for the device as supplied by the user in the web ui.

UDN: This is the UDN for the UPnP device.

Examples:

The description of device 4, the UDN of device 3: lug_device[4].Description, lug_device[3].UDN

Log all the attributes from all the devices:

 for k,v in pairs(lug_device) do
   for k2,v2 in v
     lu_log("Device #" .. k .. ":" .. k2 .. "=" .. "v2")
   end
 end

Luup Functions

General purpose

lu_CallAction

lu_DeviceSupportsService

lu_GetDevicesByService

lu_GetVariable

lu_GetXmlNodeText

lu_log

lu_SetCommFailure

lu_SetVariable

lu_WatchVariable

lu_RegisterHandler

Reporting child devices

lu_chdev_append

lu_chdev_start

lu_chdev_sync

I/O data

lu_iop_intercept_incoming

lu_iop_open

lu_iop_recv_block

lu_iop_send

Job Handling

lu_job_set

lu_job_get