IoT Server Platform based on Node.js.
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Mobius Platform works as the middle bridge to enable the communications and interactions between IoT devices and IoT applications as following:
① The Mobius server accepts the uploaded data from authenticated IoT devices and stores the data into the MySQL DB;
② The authenticated IoT applications can retrieve the data stored in Mobius server using Mobius open APIs for monitoring purpose;
③ The authenticated IoT applications are able to control remotely IoT devices that have already registered with Mobius server by sending control commands included in <contentInstance> resource. The Mobius server then executes control commands to the target devices
Mobius server consists of HTTP, CoAP, MQTT, WebSocket server and MySQL DBMS while IoT applications implement HTTP, CoAP and/or MQTT clients in order to communicate with Mobius server.
For protocol binding support, Mobius has MQTT broker, CoAP server, WebSocket server that is bound to HTTP server internally. For example, MQTT protocol binding is supported by implementing MQTT to HTTP proxy. CoAP and WebSocket are designed in the same way. Mainly it consists of requester and responder. The requester contains the DB access component. Every HTTP request is go through requester component, parser, actor and then create SQL query to data access (e.g. retrieval, discovery) with DB connector. When it gets access result, the responder creates the response in XML, JSON or CBOR serialization.
|Source File||Role and Function|
|mobius.js||This file initiates Mobius server and helps loading main Node JS files. It also contains configuration parameters for Mobius server such as defaultbodytype indicating the serialization, usecsetype indicating CSE type (either IN-CSE, MN-CSE or ASN-CSE), usecsebase indicating CSEBase name, usecseid indicating CSEID, usedbhost indicating the host address, and usedbpass indicating the password for MySQL etc. Users can modify those configuration parameters.|
|app.js||This file acts as role of flow router and it is the main code running Mobius-YT server.
① It handles initial processing of received packets.
② It initiates HTTP server with ‘listening’ mode to wait for HTTP requests target to the Mobius HTTP server.
③ It handles the parsing of URL of packets and evaluate the correctness of the request body resulted of parsing. It then sends the request to resource.js to continue the processing if the request is valid one, otherwise throws exceptions.
This file also implements the server clustering algorithms to improve the performance of HTTP server.
|mobius/resource.js||It is core file to process the CREATE, RETRIEVE, UPDATE, DELETE, NOTIFY and DISCOVERY operations for oneM2M resource primitives. This file undertakes the processing of parsed request URI and request body received from app.js according to corresponding operation. It converts the data into a format to process the data and connect to mysql database. The mysql database is initialized and handled by db_action.js and sql_action.js module.|
|mobius/responder.js||It is responsible for handling the response process. It receives processing results from app.js and resource.js modules and generates responses from the processing results following format requested by originator either XML or JSON serialization.|
|mobius/db_action.js||This file contains parameters used to connect and access to the database and parameters for returning response results from the database.|
|mobius/sql_action.js||This file contains functions to receive data and parameters required for a series of database operations and functions to call db_action.js module to return data from database.|
|mobius/sgn.js||This module file is responsible for checking the existence of <subscription> child resource under the requested target resource. If it exists, the module checks the event type and retrieves the field value of attribute notificationUril. Then it generates and sends a notification message to the address indicated by field value of attribute notificationUril.|
|mobius/security.js||This file contains functions to check the access privileges of originators for a requested resource when the resource applies with <accessControlPolicy> resource. The originator ID is abstracted from request header field of X-M2MOrigin. The process checks the access right of current originator ID to a target resource and responds with ACESS_DENIED error when the originator ID has no privileges to access to the resource.|
|mobius/ts_agent.js||This file contains functions to manage <timeSeriesInstance> resource. It monitors the mssing data in the <timeSeriesInstance> resource and then stores the missing data.|
|pxymqtt.js||This file contains functions implementing mqtt proxying function to handle mqtt protocol messages in http protocol manner as following procedures:
① It creates a oneM2M mqtt topic with configuration information of Mobius server and then subscribe to the topic to receive mqtt requests targeted to this topic later.
② Whenever receiving mqtt protocol messages, it generates and sends a http request wrapping mqtt request message to Mobius server and waits for http response from Mobius server. It then abstracts http response and generates a mqtt response message correspondingly.
③ It responds with mqtt protocol message.
|mobius/acp.js||It contains functions to parse accessControlPolicy request. The accessControlPolicy resource is used to manage the access control privileges to resources that apply with access control policy.|
|mobius/ae.js||It contains functions to parse AE request.|
|mobius/cb.js||It contains functions to parse CSEBase request. The CSEBase resource contains configuration information of Mobius server.|
|mobius/cin.js||It contains functions to parse contentInstance request.|
|mobius/cnt.js||It contains functions to parse container request.|
|mobius/csr.js||It contains functions to parse remoteCSE request.|
|mobius/grp.js||It contains functions to parse group request.|
|mobius/lcp.js||It contains functions to parse locationPolicy request.|
|mobius/mms.js||It contains functions to parse multimediaSession request.|
|mobius/mn.js||It contains functions to parse MN-CSE resource request including implementation of registration function with IN-CSE. It is used to drive nCube:rosemary.|
|mobius/sd.js||It contains functions to parse semanticDescriptor request.|
|mobius/sub.js||It contains functions to parse subscription request.|
|mobius/ts.js||It contains functions to parse timeSeries request.|
|mobius/tsi.js||It contains functions to parse timeSeriesInstance request.|
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oneM2M IoT Server Platform
Mobius is the open source IoT server platform based on the oneM2M (http://www.oneM2M.org) standard. As oneM2M specifies, Mobius provides common services functions (e.g. registration, data management, subscription/notification, security) as middleware to IoT applications of different service domains. Not just oneM2M devices, but also non-oneM2M devices (i.e. by oneM2M interworking specifications and OCEAN TAS) can connect to Mobius.
In oneM2M architecture, Mobius implements the IN-CSE which is the cloud server in the infrastructure domain. IoT applications communicate with field domain IoT gateways/devices via Mobius.
To enable Internet of Things, things are connected to &Cube via TAS (Thing Adaptation Software), then &Cube communicate with Mobius over oneM2M standard APIs. Also IoT applications use oneM2M standard APIs to retrieve thing data control things of Mobius.
The Mobius is based on Node.js framework and uses MySQL for database.
"csebaseport": "7579", //Mobius HTTP hosting port
"dbpass": "keti123" //MySQL root password
Use node.js application execution command as below
This is the list of library dependencies for Mobius
If you want more details please dowload the full installation guide document(Git Hub).