ArenaVision Tester
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ArenaVision Tester



Node.js is a server side software system designed for writing scalable Internet applications in JavaScript.


MongoDB is a scalable, high-performance, open source NoSQL database.


Clone the repository:

git clone git://

or download and extract it.

Go to the project's directory and install the dependencies:

cd walkner-av/
npm install


Configuration files are the JavaScript files residing in the config/ directory.


Configuration of the HTTP server express.

  • port - port on which the HTTP server should listen.


Configuration of the MongoDB client.

  • uri - connection URI in the following format: mongodb://<host>[:<port>]/<dbname>.


Logs configuration. Logs of the following levels will be redirected to stdout: log, debug, info, warn and error.

  • productionLevels - object defining what logs should make it through the log filter, if the NODE_ENV is set to production.
  • developmentLevels - object defining what logs should make it through the log filter, if the NODE_ENV is set to development.


Configuration of authentication and authorization.

  • superUser - object of a user with all privileges. One can log in as a super user even if it's not in the database. Handy, if run on an empty database.
  • guestUser - object of a user assigned to not logged in browser clients.


Configuration of a browser that is started by the server when run in the production environment.

  • cmd - command that opens a browser pointed to the application.


  • simulation - whether to run the simulation of a test if the programRunning tag changes to 1.

  • master - configuration of a MODBUS master:

    • timerFactor - tags programTime, hrsTime and hrsInterval are multiplied by this value before sending them off to the slave.
    • type - connection and transport type. Possible values are: tcp, tcp-rtu, tcp-ascii, serial-ascii and serial-rtu.
    • host - slave host/IP address if using TCP connection.
    • port - slave listening port if using TCP connection.
    • timeout - default MODBUS request timeout.
    • maxTimeouts - if the number of consecutive timeouts is equal to maxTimeouts, then the connection is destroyed and recreated.
    • unit - default MODBUS slave unit ID.
    • maxRetries - a number of times a MODBUS request is retried on error before giving up and handing the error to the user's handler function.
    • interval - default interval between requests,
    • maxConcurrentRequests - how many parallel requests can be sent to the slave.
    • requestOnReconnectDelay - on reconnect, wait the specified number of milliseconds before executing the queued requests and transactions.
  • transactions - an array of objects describing tags and MODBUS transactions. The application expects the following 1 bit tags: programRunning, runMode, selectedProgram1, selectedProgram2 and the following 32-bit signed int tags: temperature, light, voltage, current, hrsIteration, predefinedTime1, predefinedTime2 and the following 4 32-bit signed int tags that must occupy consecutive registers: hrsCount, hrsInterval, hrsTime, programTime. Each object must have following properties:

    • id - an ID of the transaction.
    • fn - a MODBUS function code (0x01, 0x02 or 0x03).
    • address - a starting address of the first tag.
    • tags - an array of tag names,
    • writable - whether the tags specified in this transaction are writable.
    • interval - a number of milliseconds between executions of this transaction.
  • scalers - an object specifying minimums, maximums and scaling function for tags.

    • min - if the read value is lower than the min value, it is set to min.
    • max - if the read value is greater than the max value, it is set to max.
    • scaler - a function that takes a raw value from MODBUS slave and transforms it to another value before handing it to application for further processing.


Configuration of the network interface monitor module.

  • enabled - whether to monitor the network interface.
  • ipAddress - an IP address to look for in stdout of checkCmd.
  • checkCmd - a command that returns the current IP address of the monitored network interface.
  • restartCmd - a command executed if the ipAddress could not be found in stdout of checkCmd.
  • interval - a number of milliseconds between checkCmd executions.


Configuration of the serproxy daemon.

  • enabled - whether to spawn the process.
  • cmd - command to execute if enabled is TRUE.
  • args - an array of command arguments.
  • opts - child_process.spawn options.


Configuration of the MongoDB server. Description of the individual options can be found in the MongoDB documentation.


If not yet running, start the MongoDB:

mongod -f walkner-av/config/mongod.conf

Start the application server in development or production environment:

  • under *nix:

    NODE_ENV=development node walkner-av/server/index.js
  • under Windows:

    SET NODE_ENV=development
    node walkner-av/server/index.js

To run the application in production environment one must have r.js properly set up and then execute the following commands:

$ r.js walkner-av/bin/build-client.js
$ r.js walkner-av/bin/build-min.js

Application should be available on a port defined in config/express.js file (80 by default). Point the Internet browser to


walkner-av is released under the CC BY-NC-SA-4.0 License.

Copyright (c) 2014, Łukasz Walukiewicz Some Rights Reserved.