Querying the device for data
The LIFX protocol supplies a number of Get
messages for getting information from the LIFX devices. When you send these messages to the device with the res_required
flag set to 0
you will get one or more State
messages in response.
Below you will find the type
of the message, the fields that make up the payload of the message, the information you get from the request, and how many State
messages you should expect in response.
Note that unless specified these packets have an empty payload.
Discovery
GetService - Packet 2
This packet is used for Discovery of devices. Typically you would broadcast this message to the network (with tagged
field in the header set to 0
and the target
field in the header set to all zeros)
Each device on the network that receives this packet will send back multiple StateService (3) messages that say what services are available and the port those services are on.
The only StateService (3) message you care about will tell you that UDP
is available on a port that is usually 56700
. You can determine the IP
address of the device from information your UDP
socket should receive when it gets those bytes.
Device
GetHostFirmware - Packet 14
This is used to determine the version of the firmware you have on your device. Typically you would use this information to determine the capabilities of your device as specified in our Product Registry.
Will return one StateHostFirmware (15) message
GetWifiInfo - Packet 16
This packet is used to determine the signal strength of the device.
Will return one StateWifiInfo (17) message
GetWifiFirmware - Packet 18
Our first and second generation devices have separate wifi firmware to the host firmware. For these devices, this message will return the version of the wifi firmware on the device. This message can be used to determine the version of this firmware.
Will return one StateWifiFirmware (19) message
GetPower - Packet 20
This packet can be used to determine the power level of the device.
Will return one StatePower (22) message
GetLabel - Packet 23
This packet can be used to determine the label set on the device.
Will return one StateLabel (25) message
GetVersion - Packet 32
This packet can be used to determine the product type of the device.
Typically this information is used to determine what capabilities the device has as defined by our Product Registry.
Will return one StateVersion (33) message
GetInfo - Packet 34
This can be used to determine the uptime and downtime of the device. As well as the current time according to the device.
Will return one StateInfo (35) message
GetLocation - Packet 48
This packet can be used to determine the uuid and label of the location assigned to this device.
Will return one StateLocation (50) message
GetGroup - Packet 51
This packet can be used to determine the uuid and label of the group assigned to this device.
Will return one StateGroup (53) message
EchoRequest - Packet 58
This packet can be used to check that a device is online and responding to you.
Will return one EchoResponse (59) message
echoing : 64 BytesThe bytes you want to receive in the EchoResponse (59) message. |
Light
GetColor - Packet 101
This packet is used to get the current visual state of the device.
Will return one LightState (107) message
GetLightPower - Packet 116
Like GetPower (20) this packet will return the current power level of the device.
Will return one StateLightPower (118) message
GetInfrared - Packet 120
This packet is used to determine the current infrared level of the device.
Will return one StateInfrared (121) message
This packet requires the device has the infrared
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
GetHevCycle - Packet 142
This packet is used to determine the state of the HEV LEDs on the device
Will return one StateHevCycle (144) message
This packet requires the device has the hev
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
GetHevCycleConfiguration - Packet 145
This packet is used to determine the default configuration for using the HEV LEDs on the device.
Will return one StateHevCycleConfiguration (147) message
This packet requires the device has the hev
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
GetLastHevCycleResult - Packet 148
This packet is used to determine the result of the last HEV cycle that was run
Will return one StateLastHevCycleResult (149) message
This packet requires the device has the hev
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
MultiZone
GetColorZones - Packet 502
There are two possible messages that this request may return. If the number of zones in the response is just one then you will get a single StateZone (503). Otherwise you will get one or more StateMultiZone (506) replies.
You can determine how many StateMultizone messages you will receive by looking at the request and the first reply.
Some pseudo code would look like this:
number_segments_of_8 = (request.end_index - request.start_index) / 8
count_from_request = maximum(1, floor(number_segements_of_8) + 1)
count_from_response = ceil(first_response.zone_count / 8)
expected_number_of_messages = minimum(count_from_request, count_from_response)
Note that if you want all the zones to be returned to you, you should set start_index
to 0
and end_index
to 255
This packet requires the device has the Linear Zones
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
GetMultiZoneEffect - Packet 507
This packet can be used to determine if the device is currently running a multizone Firmware Effect.
Will return one StateMultiZoneEffect (509) message
This packet requires the device has the Linear Zones
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
GetExtendedColorZones - Packet 511
This packet can be used to get response packets containing the HSBK values for every zone on your strip.
Will return StateExtendedColorZones (512) messages. If the light has more than 82 zones, then multiple responses shall be returned with different zone_index
values. The value of the zone_count
property shall indicate the total number of zones on the device.
This packet requires the device has the Extended Linear Zones
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
Relay
GetRPower - Packet 816
Get the power state of a relay on a switch device.
Will return one StateRPower (818) message
This packet requires the device has the Relays
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
relay_index : Uint8The relay on the switch starting from 0 . |
Tile
GetDeviceChain - Packet 701
This packet can be used to get information about all the devices in the chain. Note that for LIFX Tiles this will only ever be up to 5
devices and for the LIFX Candle it will only be 1
device.
Will return one StateDeviceChain (702) message
This packet requires the device has the Matrix Zones
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
Get64 - Packet 707
Used to get the HSBK values of all the zones in devices connected in the chain.
this will return one or more State64 (711) messages. The maximum number of messages you will receive is the number specified by length
in your request.
This packet requires the device has the Matrix Zones
capability. You may use GetVersion (32), GetHostFirmware (14) and the Product Registry to determine whether your device has this capability
tile_index : Uint8The first item in the chain you want zones |
length : Uint8The number of tiles after tile_index you want HSBK values from. |
reserved6 : 1 Reserved bytes |
x : Uint8The x value to start from. You likely always want this to be 0 . |
y : Uint8The y value to start from. You likely always want this to be 0 . |
width : Uint8The width of each item in the chain. For the LIFX Tile you want this to be 8 and for the LIFX Candle you want this to be 5 . |
GetTileEffect - Packet 718
Used to determine if the device is running a Firmware Effect.
Will return one StateTileEffect (720) message
SensorGetAmbientLight - Packet 401
Used to get the current ambient light level from a device. Device will return a SensorStateAmbientLight (402) message.
Updated about 1 year ago