-----------------------------------------------------------------------------
-- Openwrt與貝殼物聯平臺通訊示例
-- http://www.bigiot.net/help/5.html
-- Author: 貝殼物聯
-- Time: 2016/1/10
-----------------------------------------------------------------------------
local socket = require("socket")--引入Luasocket
local json = require("json")--引入Json4lua
local util 
 
= require "luci.util"--引入luci,呼叫cup負載
------------此處需修改-------------
DEVICEID = "2" --裝置ID
APIKEY = "2353d24ce" --裝置APIKEY
INPUTID = "2" --資料介面ID
-----------------------------------
host = host or "www.bigiot.net"
port = port or 8181
lastTime = 0
lastUpdateTime = 0
if arg then
    host = arg[1] or host
    port 
 
= arg[2] or port
end
print("Attempting connection to host '" ..host.. "' and port " ..port.. "...")
c = assert(socket.connect(host, port))
c:settimeout(0)
print("Connected! Please type stuff (empty line to stop):")
while true do
    if ((os.time() - lastTime) > 40) then
        print( os.time() )
        s 
 
= json.encode({M='checkin',ID=DEVICEID,K=APIKEY})
        assert(c:send( s.."\n" ))
        lastTime=os.time()
    end
    if ((os.time() - lastUpdateTime) > 5) then
        local sysinfo = luci.util.ubus("system", "info") or { }
        local load = sysinfo.load or { 0, 0, 0 } --獲取Openwrt系統負載
        local v = {[INPUTID]=load[1]} --多個介面資料可用v = {[INPUTID1]=load[1],[INPUTID2]=load[2]}
        local update = json.encode({['M']='update', ['ID']=DEVICEID, ['V']=v})
        assert(c:send( update.."\n" ))
        lastUpdateTime = os.time()
    end
    recvt, sendt, status = socket.select({c}, nil, 1)
    --#獲取table長度，即元素數
    while #recvt > 0 do
        local response, receive_status = c:receive()
        if receive_status ~= "closed" then
            if response then
                print(response)
                r = json.decode(response)
                table.foreach(r, print)
                if r.client_list then
                    table.foreach(r.client_list, print)
                end
                recvt, sendt, status = socket.select({c}, nil, 1)
            end
        else
            break
        end
    end
end