LIFX Developer Home | LAN Protocol. LiFi Labs, Inc. © 2015. All rights reserved. Usage of this documentation is bound by the [LIFX Developer Terms] (http://developer.lifx.com/terms.html).
- Overview
- Message field data types
- Light messages - message type value
Light messages control and acquire the state of a specific type of device, such as a lightbulb. The state is comprised of the label, power level and color.
There are a duplicate set of device power related messages, Device::GetPower, Device::StatePower and Device::SetPower, which are extended for lights by adding a duration field to Light::SetPower.
The Protocol header message type field value (decimal) appears after each message name in this document. Each section below describes the payload that is appended to the message header. Some messages do not require a payload.
HSBK is used to represent the color and color temperature of a light.
The color is represented as an HSB (Hue, Saturation, Brightness) value.
The color temperature is represented in K (Kelvin) and is used to adjust the warmness / coolness of a white light, which is most obvious when saturation is close zero.
- Hue: range 0 to 65535
- Saturation: range 0 to 65535
- Brightness: range 0 to 65535
- Kelvin: range 2500° (warm) to 9000° (cool)
| Field | Type |
|---|---|
| hue | unsigned 16-bit integer |
| saturation | unsigned 16-bit integer |
| brightness | unsigned 16-bit integer |
| kelvin | unsigned 16-bit integer |
For user interface purposes, the hue is typically scaled to between 0° and 360°. Saturation and brightness are typically scaled to between 0% and 100%.
Sent by a client to obtain the light state. No payload required. Causes the device to transmit a State message.
Sent by a client to change the light state.
| Field | Type |
|---|---|
| reserved | unsigned 8-bit integer |
| color | HSBK |
| duration | unsigned 32-bit integer |
The duration is the color transition time in milliseconds.
If the Frame Address res_required field is set to one (1) then the device will transmit a State message.
Sent by a device to provide the current light state.
| Field | Type |
|---|---|
| color | HSBK |
| reserved | signed 16-bit integer |
| power | unsigned 16-bit integer |
| label | string, size: 32 bytes |
| reserved | unsigned 64-bit integer |
See color, label and power level.
Sent by a client to obtain the power level. No payload required. Causes the device to transmit a StatePower message.
Sent by a client to change the light power level.
| Field | Type |
|---|---|
| level | unsigned 16-bit integer |
| duration | unsigned 32-bit integer |
The power level must be either 0 or 65535.
The duration is the power level transition time in milliseconds.
If the Frame Address res_required field is set to one (1) then the device will transmit a StatePower message.
Sent by a device to provide the current power level.
| Field | Type |
|---|---|
| level | unsigned 16-bit integer |