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Cumulocity (view source)

Revision as of 13:40, 2 May 2018

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[[File:cum.png|right|160px]]
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The '''Cumulocity''' is now compatible with RUT routers.
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==Description==
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Cumulocity is the leading independent Device and Application Management Internet of Things (IoT) Platform since 2010. Our Internet of Things Platform connects and manages your machines effortlessly, so you can focus on your business's value adding activities.
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{{Template: trademark disclaimer}}
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==Summary==
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This example application streams some information from the router device. Once it is enabled you should be able to view in Cumulocity Cockpit the following information from your router:
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Device Model, Revision and Serial Number
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Mobile Cell ID, ICCID, IMEI, Connection Type, Operator, Signal Strength
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WAN Type and IP
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Mobile and WAN information are sent from “stream” Lua script, while Device information - from stream application. This information (except Device) is being sent to the main Cumulocity server continuously: at 10 seconds interval.
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==Creating an account==
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First of all, you need to have a working Cumulocity server. After registration, you will receive Cumulocity evaluation server for 30 days. Registration form can be found at https://www.cumulocity.com/try-for-free. Below you can see registration form:
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[[File:registercumulocity.png]]
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'''Note:''' The value in URL field will be your Cumulocity server address.
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After successful registration, you can log in by entering the same full URL you have used in registration form. In this example it is myservername.cumulocity.com. Then navigate to: https://myservername.cumulocity.com and after logging in, you will be redirected to Cumulocity Cockpit portal, see below:
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[[File:cumulocityportal.png]]
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==Preparing firmware with example application==
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First, you need to obtain GPL from https://teltonika-networks.com/gpl. Now you need to run “make menuconfig” command inside GPL folder.
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[[File:cummakeconfig.png]]
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You need to add example application so it can be built. Navigate to “Network” section and select “cmstreamapp” with spacebar key. It will show “<*>” once application is added, see below:
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[[File:cumnetworksection.png]]
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Now do the same with “Luci” section,  “Applications → luci-app-iot”. This will enable to configure example package from router control panel, see below for example:
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[[File:cumlucisection.png]]
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Everything should be ready and you can exit. Now run “make” command and firmware will appear in “bin/ar71xx/tltFws” directory. You can flash “GPL_…._WEBUI.bin” file.
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==Configuring and launching example application==
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After you successfully built and flashed firmware, in „Services“ tab there should be an option called „IoT Platforms“.
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[[File:cumiot.png]]
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[[File:cumiotwindow.png]]
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Only single field is required, which is Server Address. This is the same URL of Cumulocity Cockpit website. In this example, it is myservername.cumulocity.com.
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Explanation of other options:
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Use SSL/TLS – connection will use TLS, however, you need to have a signed SSL certificate, otherwise application would not be able to connect to the Cumulocity server.
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Reset Auth – once device has been removed from the Cumulocity Device Management, you will need to reset authentication in order to re-register device.
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Also click „Enable“ to enable example application. See below:
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[[File:cumiotvalues.png]]
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Now click „Save“ and if everything is correct – example application will successfully connect to the Cumulocity server.
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Now you need to register device on Device Management in Cumulocity Cockpit.
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Device registration is done by writing down device's serial number. In order to obtain your device's serial number, look at the backplate of it or navigate to your device's control panel and then to „Status → Device“ page:
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[[File:cumdevice.png]]
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In this case, serial number is 09516845.
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Now log into your Cumulocity Cockpit portal, in this example URL is https://myservername.cumulocity.com.
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Go to the Device Management page:
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[[File:cumcockpit.png]]
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[[File:cumdevicemanagement.png]]
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Then navigate to Registration page:
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[[File:cumdevicepage.png]]
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Click „Register device“:
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[[File:cumdeviceregister.png]]
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Click „General device registration“:
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[[File:cumnewdevice.png]]
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Write device’s serial number in „Device ID“ field and click „Next“:
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[[File:cumdeviceregistration.png]]
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As shown below, registration is successful:
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[[File:cumsuccessresgister.png]]
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Click „Finish“ to  close this pop-up. Now if everything is correct, a new device widget should show up with a status „PENDING ACCEPTANCE“:
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[[File:cumpendingdevice.png]]
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Click „Accept“ button to accept this device.
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Now navigate to „All devices“ page:
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[[File:cumalldevices.png]]
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Here you should be able to see list of all registered devices:
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[[File:cumallregistereddevices.png]]
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Click on „TLT-RUT955 Router“ name to get into information page:
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[[File:cumdeviceinfo.png]]
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Notice „Device Data“ widget, it contains information from the router device. By navigating to „Control“ tab, you can restart device by clicking „More → Restart Device“:
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[[File:cumdevicecontrol.png]]
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You can go back to Cumulocity Cockpit page the same way you entered Device managemant page:
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[[File:cumnavigatecockpit.png]]
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Then navigate to „Home“ page:
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[[File:cumnavigatehome.png]]
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And then click „Add widget“:
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[[File:cumaddwidget.png]]
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Select „Asset properties“ widget and type title, then select „TLT-RUT955 Router“ in „Target Assets or Devices“:
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[[File:cumcreatewidget.png]]
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To add more information into widget, click „Add property“ and click on „Show“ to add that property.
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In example application, these properties are used:
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Hardware – Model, Revision, Serial Number
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Mobile – Cell ID, Connection Type, Current Operator, ICCID, IMEI and Signal
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WAN – IP and Wan Type
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Total properties:
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[[File:cumtotalprops.png]]
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Then click „Save“ and you should be able to see widget with properties you have set:
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[[File:cumdevicewidgetinfo.png]]
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==Explanation of example application==
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There are two steps when adding new properties:
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1. Writing template
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2. Writing lua script which will stream information.
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By default, template location inside router is „/usr/lib/lua/cm/srtemplate.txt“. It contains such content:
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rut955-v0.01
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10,100,GET,/identity/externalIds/SerialNumber/%%,,application/json,%%,STRING,
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10,101,POST,/inventory/managedObjects,application/json,application/json,%%,STRING,"{""name"":""%%"",""c8y_IsDevice"":{},""com_cumulocity_model_Agent"":{}}"
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10,102,POST,/identity/globalIds/%%/externalIds,application/json,application/json,%%,STRING STRING,"{""externalId"":""%%"",""type"":""SerialNumber""}"
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10,103,PUT,/inventory/managedObjects/%%,application/json,application/json,%%,STRING STRING STRING,"{""name"": ""%%"", ""type"": ""%%""}"
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10,104,PUT,/inventory/managedObjects/%%,application/json,application/json,%%,STRING STRING STRING STRING,"{""c8y_Hardware"":{""model"":""%%"",""revision"":""%%"",""serialNumber"":""%%""}}"
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10,105,PUT,/inventory/managedObjects/%%,application/json,application/json,%%,STRING STRING STRING STRING STRING STRING STRING,"{""c8y_Mobile"":{""imei"":""%%"",""cellId"":""%%"",""iccid"":""%%"",""connType"":""%%"",""currentOperator"":""%%""},""signal"":""%%""}"
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10,106,PUT,/inventory/managedObjects/%%,application/json,application/json,%%,STRING STRING STRING,"{""c8y_Network"":{""c8y_WAN"":{""ip"":""%%""}},""wanType"":""%%""}"
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10,107,PUT,/inventory/managedObjects/%%,application/json,application/json,%%,UNSIGNED STRING,"{""c8y_SupportedOperations"":[""%%""]}"
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10,108,PUT,/devicecontrol/operations/%%,application/json,application/json,%%,UNSIGNED STRING,"{""status"":""%%""}"
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11,500,$.managedObject,,$.id
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11,501,,$.c8y_IsDevice,$.id
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11,502,,$.c8y_Restart,$.id,$.deviceId
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First line contains template version. In this case it is „rut955-v0.01“.
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When template is updated, version must be updated aswell, otherwise device will use non-updated template version.
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The following lines contains requests starting with a number „10“ and responses - starting with a number „11“. Now explanation of request:
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Type - 10
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Code - 101
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Method - POST
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URL - /inventory/managedObjects
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Content Type - application/json
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Accept - application/json
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Placeholder - %%
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Params - STRING STRING
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Template - JSON
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Type – requests are identified by a number 10
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Code – request code number, each request must contain unique number
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Method – HTTP method of request
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URL – URL that will be used in request
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Content Type – it is Content-Type header field value
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Accept – it is Accept header field value, mostly equal to Content Type
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Placeholder  - string which will be replaced in URL or Template JSON
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Params – what kind of params are replaced, JSON template contains two strings
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Template – JSON template which will be sent
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Explanation of response:
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Type - 11
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Code - 502
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Cond - <none>
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Value 1 - $.c8y_Restart
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Value 2 - $.id
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Value3 - $.deviceId
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Type – responses are identified by a number 11
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Code – response code, each response must contain unique number
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Cond – JSON path base pointing to an object or object list from which values are
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extracted
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Value… - JSON values
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Take a look for more information about templates: https://www.cumulocity.com/guides/reference/smartrest.
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Now explanation of logic inside lua script. By default, example application’s lua script location is „/usr/bin/lua/cm“. Application will scan this folder for any *.lua files and load them if they contains „init“ function.  Script’s „stream.lua“ content:
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-- stream.lua
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local utl = require "luci.util"
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local sys = require "luci.sys"
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local DEVICE_NAME = 'TLT-RUT955 Router'
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local DEVICE_TYPE = 'Router'
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function restart(r)
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  local deviceId = r:value(2)
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  c8y:send('108,'..deviceId..',SUCCESSFUL')
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  sys.exec("reboot")
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end
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function init()
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  srInfo('*** Stream Init ***')
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  -- set device name and type
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  c8y:send('103,'..c8y.ID..','..DEVICE_NAME..','..DEVICE_TYPE)
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  -- set restart as supported operation
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  c8y:send('107,'..c8y.ID..',c8y_Restart')
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  -- set imei, cellid and iccid first time
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  mobileDataStream()
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  -- create timer which will stream mobile info data
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  local m_timer = c8y:addTimer(10 * 1000, 'mobileDataStream')
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  m_timer:start() 
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  -- register restart handler
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  c8y:addMsgHandler(502, 'restart')
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  return 0
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end
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function mobileDataStream()
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  local imei = utl.trim(sys.exec("gsmctl -i"))
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  local cell = utl.trim(sys.exec("gsmctl -C"))
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  local icc = utl.trim(sys.exec("gsmctl -J"))
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  local type = utl.trim(sys.exec("gsmctl -t"))
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  local oper = utl.trim(sys.exec("gsmctl -o"))
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  local sign = utl.trim(sys.exec("gsmctl -q"))..' dBm'
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  local req = '105,'..c8y.ID
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  req = req..','..imei
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  req = req..','..cell
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  req = req..','..icc
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  req = req..','..type
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  req = req..','..oper
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  req = req..','..sign
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  -- send mobile info
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  c8y:send(req)
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  local wantype = utl.trim(sys.exec("uci get -q network.wan.ifname"))
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  local wanip = utl.trim(sys.exec("curl -s http://whatismyip.akamai.com"))
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  -- send wan info
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  c8y:send('106,'..c8y.ID..','..wanip..','..wantype)
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end
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Once application finds lua script, it will call „init“ function. This is where all initialization of timers and other stuff should be.
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Sending information is quite simple:
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c8y:send('103,'..c8y.ID..','..DEVICE_NAME..','..DEVICE_TYPE)
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By using „c8y:send“ function, first string contains request code, which was defined in the template, earlier. Then comma must appear after each value. The above line shows how we update device name and device type with our own.
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For more information about Lua API, download Cumulocity C++ SDK: https://bitbucket.org/m2m/cumulocity-sdk-c/downloads and look up inside „sdk/doc/lua.html“ with a browser.
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==External Links==
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https://www.cumulocity.com/try-for-free
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https://www.cumulocity.com/guides/reference/smartrest
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https://bitbucket.org/m2m/cumulocity-sdk-c/downloads
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{{Template: trademark disclaimer}}
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