Controlling LIFX bulbs

I think we need a place to post SHAC lua code (like we have for pascal code)

The following functions allow you to turn lifx bulbs on and off and set their colour.
The functions are:
lifx_pwron(ip) -- turn the bulb on where ip is ip address string (e.g. '192.168.1.65)
lifx_pwroff(ip) -- turn bulb off
lifx_hsvk(ip, hue, saturation, intensity, kelvin, time) -- Set colour where hue is 0-360, saturation and intensity is 0-100,
kelvin in degrees and time in seconds.

Create a new user library called lifx, set it to auto load, and add in the following code:

Code:

-- Basic library to control (test!) LIFX bulbs
-- Local functions

lifx_pwroncmd = string.char(0x2A, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00)

lifx_pwroffcmd = string.char(0x2A, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00)

lifx_colcmd = string.char(0x31, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x66, 0x00, 0x00, 0x00, 0x00)

function lifx_send(ip, cmd)
  require('socket').udp():sendto(cmd, ip, 56700)
end

function Lifx16toStr(value)
  return string.char(value % 256, value / 256 % 256)
end

function Lifx32toStr(value)
  return string.char(value % 256, value / 256 % 256, value / 65536, value / 16777216 % 256)
end
-- End local functions

---------------------
-- Start user functions

-- turn on light
function lifx_pwron(ip)
  alert('power on')
  lifx_send(ip, lifx_pwroncmd)
end

-- Turn off light
function lifx_pwroff(ip)
  lifx_send(ip, lifx_pwroffcmd)
end

--[[
Set colour of lifx bulb
ip = ip address eg '192.168.1.65'
hue is colour in degrees from 0-360
sat is saturation from 0% (white) to 100%
val is intensity from 0% to 100%
kelvin is colour temperature
secs is time to perform change over in seconds

Notes
  All values are floating point (e.g. you can have 1.5 seconds etc)
  Doesn't turn on light if it's off. Just sets colour for next time it's turned on.
--]]
function lifx_hsvk(ip, hue, sat, val, kelvin, secs)
      local cmd = lifx_colcmd .. Lifx16toStr(hue / 360 * 65535) .. Lifx16toStr(sat / 100 * 65535) .. Lifx16toStr(val / 100 * 65535) .. Lifx16toStr(kelvin) ..
  Lifx32toStr(secs * 1000)
  lifx_send(ip, cmd)
end

To test it you can use the following event based script:

Code:

ip = '192.168.1.65' -- change to the ip of your lifx bulb!

local level = event.getvalue()

if level == 0 then
  lifx_pwroff(ip)
elseif level == 255 then
  lifx_pwron(ip)
elseif level == 1 then -- Just to set colour setting
  lifx_hsvk(ip, 120, 100, 50, 3500, 4)
end

 

Oops, There's a typo in the lifx_pwroffcmd string. The 3rd last byte should be a 0x00, not an 0x20.

Shame you can't edit posts like in the old system.

 

Great work Ashley - this is a great way to do it and makes the configuration for individual lamps quite straightforward.
I got it working on a test lamp ahead of commissioning the rest

 

I now have my 5 lamps/strips working and am using only the hsvk section of the set up proposed by Ashley. I've set up different settings in a series of if..then statements that get selected depending on the event value. so far so good!