Philips Hue Authentication

[Erwin van der Zwart]

Hi Koen,

Philips have changed the API due homekit support.

Use this to control your HUE devices with latest HUE FW update :

First run bridgeSetup() once to receive the user (see log after running) and enter where now "xxxxxxxxxxxxxxxxxx' is filled in.

Code:

require('json')
require('socket.http')
require("ltn12")

--************************************************
ip_add = '192.168.1.25'
user = "XXXXXXXXXXXXXXXXXXXXX"    -- Response from bridgeSetup()
--************************************************

response = {}

function bridgeSetup()
 body_bridgeSetup= '{"devicetype":"homelynk#homelynk"}'
 -- Set username for homeLYnk
    socket.http.request({
     url = "http://"..ip_add.."/api",
  method = 'POST',
    sink = ltn12.sink.table(response),
 headers = {
     ['content-length'] = #body_bridgeSetup,
       ['content-type'] = 'application/json',
           },
   source = ltn12.source.string(body_bridgeSetup),
       })
    log(response)
end

function checkUser()
  body_bridgeSetup= '{}'
 -- Set username for homeLYnk
    socket.http.request({
     url = "http://"..ip_add.."/api/"..user,
  method = 'GET',
    sink = ltn12.sink.table(response),
 headers = {
     ['content-length'] = #body_bridgeSetup,
       ['content-type'] = 'application/json',
           },
   source = ltn12.source.string(body_bridgeSetup),
       })
    log(response)
 ret = table.concat(response)
    data = json.pdecode(ret)
 
 if (data[1].error.type)==1 then
   log("Hue bridge user is not set")
   return false
 else
   log("Hue bridge user is set")
   return true
 end
 
end

function searchHueLights()
 body_searchHueLights= ''
 -- Set username for homeLYnk
    socket.http.request({
     url = "http://"..ip_add.."/api/"..user.."/lights",
  method = 'POST',
    sink = ltn12.sink.table(response),
 headers = {
     ['content-length'] = #body_searchHueLights,
       ['content-type'] = 'application/json',
           },
   source = ltn12.source.string(body_searchHueLights),
       })
    log(response)
end

function sendToLight(Light_num,body_request)
 socket.http.request({
     url = "http://"..ip_add.."/api/"..user.."/lights/"..tostring(Light_num).."/state",
  method = 'PUT',
    sink = ltn12.sink.table(response),
 headers = {
       ['content-length'] = #body_request,
       ['content-type'] = 'application/json',
           },
     source = ltn12.source.string(body_request),
       })
    --log(response)
end

function sendToGroup(Group_num,body_request)
 socket.http.request({
     url = "http://"..ip_add.."/api/"..user.."/groups/"..tostring(Light_num).."/action",
  method = 'PUT',
    sink = ltn12.sink.table(response),
 headers = {
       ['content-length'] = #body_request,
       ['content-type'] = 'application/json',
           },
     source = ltn12.source.string(body_request),
       })
    --log(response)
end

function setRGB(Light_num,RGB_variable)
--RGB color set in homeLYnk
Red=bit.rshift(bit.band(RGB_variable,0xff0000),16)
Green=bit.rshift(bit.band(RGB_variable,0x00ff00),8)
Blue=bit.band(RGB_variable,0x0000ff)

-- Norm of RGB values
Red_f=    Red/255
Green_f=Green/255
Blue_f=    Blue/255

--Gamma correction
if Red_f>0.04045 then
 Red_f=((Red_f+0.055)/(1+0.055))^2.4
else
 Red_f=Red_f/12.92
end

if Green_f>0.04045 then
 Green_f=((Green_f+0.055)/(1+0.055))^2.4
else
 Green_f=Green_f/12.92
end

if Blue_f>0.04045 then
 Blue_f=((Blue_f+0.055)/(1+0.055))^2.4
else
 Blue_f=Red_f/12.92
end

--Coversion RGB->xy
X=Red_f*0.649926+Green_f*0.103455+Blue_f*0.197109
Y=Red_f*0.234327+Green_f*0.743075+Blue_f*0.022598
Z=Green_f*0.053077+Blue_f*1.035763

x=X/(X+Y+Z)
y=Y/(X+Y+Z)

--HTTP request send
body_msg = '{"on":true,"xy":['..x..','..y..']}'
sendToLight(Light_num,body_msg)  
end

 
Sample to set RGB value from color picker object event based script:

Code:

value = event.getvalue()
lamp_id = 1

if value == 0 then
 body_msg = '{"on":false}'
 sendToLight(lamp_id,body_msg)
else
 setRGB(lamp_id,value)
end

Good luck (:

BR,
Erwin