Philips Hue Authentication - Printable Version

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