### Install and Start IoT Data Simulator with Docker

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/README.md

These commands pull the necessary Docker images and start the IoT Data Simulator services using docker-compose. Ensure Docker (v. 17.05+) and docker-compose are installed. Run these commands in the directory containing 'docker-compose.yml' and '.env' files from the 'release' folder.

```Shell
docker-compose pull
docker-compose up
```

--------------------------------

### Publish to Session Management Command Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Publish a message to this topic to send management commands (start, pause, stop, restart) to a specific session identified by its ID.

```APIDOC
Topic: ./sessions.:sessionId
Description: Message to manage session execution.
Payload:
  sessionId:
    Type: string
    Description: session id property
  command:
    Type: string
    Description: session management command. One of the following: "start" | "pause" | "stop" | "restart"
Tags: sessions, management, command
```

--------------------------------

### Example Dataset with Timestamp Property

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/README.md

This JSON snippet illustrates a sample dataset record containing a timestamp property. Such datasets are used when replaying data with updated date/timestamp values, where the simulator can adjust timestamps based on current time or relative differences.

```JSON
{"timestamp": 1517303155600, "id": 1 }
{"timestamp": 1517303155800, "id": 2 }
...
```

--------------------------------

### Session Management Command Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for messages used to manage session execution. It includes the session ID and the command to execute, such as 'start', 'pause', 'stop', or 'restart'.

```APIDOC
sessionManagementCommandMessage:
  Payload:
    sessionId: string - session id property
    command: string - session management command. One of the following: "start" | "pause" | "stop" | "restart"
```

--------------------------------

### Connect to WebSocket Server using STOMP

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Handles the click event for the 'Connect' button. It retrieves the WebSocket URL, validates it, initializes a SockJS connection, and then connects using STOMP. Upon successful connection, it updates the UI state and displays a 'Connected' message.

```JavaScript
$(function(){
  $('#connect').click(function() {
    var url = $('#url').val();
    if(url === ""){
      showResponse("Enter url! (e.g. https://localhost:8080/ResolutionRoomsBackend/hello)");
      return false;
    }
    var socket = new SockJS(url);
    stompClient = Stomp.over(socket);
    stompClient.connect( {},
      function(frame) {
        setConnected(true);
        showResponse('Connected: ' + frame);
      }
    );
  });
});
```

--------------------------------

### IoT Data Simulator API Connection Details

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Provides the necessary details for establishing a connection to the IoT Data Simulator's websocket/STOMP API.

```APIDOC
URL: services:8080/ws
Scheme: stomp
Description: sessions management API
```

--------------------------------

### JavaScript UI Utility Functions

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

A collection of JavaScript functions designed to enhance user interface interactivity. This includes managing active navigation links based on URL hash, highlighting code blocks using `hljs`, and enabling expandable table rows. Event listeners are set up to trigger these functionalities on page load and hash changes.

```JavaScript
function removeCurrentLinkSelection () {
  var links = document.querySelectorAll('.navigation__list__item-text--link');
  if (!links) return;
  for (var i=0; i < links.length; i++) {
    links[i].classList.remove('navigation__list__item-text--link--active');
  }
}

function selectCurrentLink () {
  removeCurrentLinkSelection();
  var hash = window.location.hash;
  if (!hash) return;
  var link = document.querySelector("a[href='"+hash+"']");
  if (!link) return;
  link.classList.add('navigation__list__item-text--link--active');
}

function highlightCode () {
  var blocks = document.querySelectorAll('.hljs code');
  for(var i=0; i < blocks.length; i++) {
    hljs.highlightBlock(blocks[i]);
  }
}

function bindExpandButtons () {
  var buttons = document.querySelectorAll('.table__expand');
  for(var i=0; i < buttons.length; i++) {
    buttons[i].addEventListener('click', function (e) {
      var tableRow = document.querySelector('[data-nested-index="' + e.target.attributes['data-index'].value + '"]');
      tableRow.classList.toggle('table__body__row--with-nested--expanded');
      e.target.classList.toggle('table__expand--open');
    });
  }
}

window.addEventListener('hashchange', selectCurrentLink);
window.addEventListener('load', selectCurrentLink);
window.addEventListener('load', highlightCode);
window.addEventListener('load', bindExpandButtons);
```

--------------------------------

### Initialize STOMP Client and Manage UI Connection State

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Initializes the global 'stompClient' variable to null and defines a 'setConnected' function. This function enables or disables the 'connect' and 'disconnect' buttons and clears the response text area based on the WebSocket connection status, providing visual feedback to the user.

```JavaScript
var stompClient = null;
function setConnected(connected) {
  document.getElementById('connect').disabled = connected;
  document.getElementById('disconnect').disabled = !connected;
  document.getElementById('response').text = '';
}
```

--------------------------------

### Publish to Sessions Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Publish an empty message to this topic to trigger the service to provide statuses for all currently active sessions.

```APIDOC
Topic: ./sessions
Description: An empty message to trigger provision of all active sessions statuses.
Payload: (empty)
Tags: sessions, status, command
```

--------------------------------

### Standard Date and Time Regular Expression Mappings

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/regexp/date-formats-regexps.txt

This snippet provides a comprehensive set of regular expressions paired with their corresponding date and time format strings. These mappings are essential for applications that need to parse, validate, or convert date and time data from various input formats into a standardized representation. The patterns cover dates, times, and full timestamps with varying levels of precision and separators.

```Configuration
^\d{8}$===yyyyMMdd
^\d{1,2}-\d{1,2}-\d{4}$===dd-MM-yyyy
^\d{4}-\d{1,2}-\d{1,2}$===yyyy-MM-dd
^\d{1,2}/\d{1,2}/\d{4}$===MM/dd/yyyy
^\d{4}/\d{1,2}/\d{1,2}$===yyyy/MM/dd
^\d{1,2}\s[a-z]{3}\s\d{4}$===dd MMM yyyy
^\d{1,2}\s[a-z]{4,}\s\d{4}$===dd MMMM yyyy
^\d{12}$===yyyyMMddHHmm
^\d{8}\s\d{4}$===yyyyMMdd HHmm
^\d{1,2}-\d{1,2}-\d{4}\s\d{1,2}:\d{2}$===dd-MM-yyyy HH:mm
^\d{4}-\d{1,2}-\d{1,2}\s\d{1,2}:\d{2}$===yyyy-MM-dd HH:mm
^\d{1,2}/\d{1,2}/\d{4}\s\d{1,2}:\d{2}$===MM/dd/yyyy HH:mm
^\d{4}/\d{1,2}/\d{1,2}\s\d{1,2}:\d{2}$===yyyy/MM/dd HH:mm
^\d{1,2}\s[a-z]{3}\s\d{4}\s\d{1,2}:\d{2}$===dd MMM yyyy HH:mm
^\d{1,2}\s[a-z]{4,}\s\d{4}\s\d{1,2}:\d{2}$===dd MMMM yyyy HH:mm
^\d{14}$===yyyyMMddHHmmss
^\d{8}\s\d{6}$===yyyyMMdd HHmmss
^\d{1,2}-\d{1,2}-\d{4}\s\d{1,2}:\d{2}:\d{2}$===dd-MM-yyyy HH:mm:ss
^\d{4}-\d{1,2}-\d{1,2}\s\d{1,2}:\d{2}:\d{2}$===yyyy-MM-dd HH:mm:ss
^\d{1,2}/\d{1,2}/\d{4}\s\d{1,2}:\d{2}:\d{2}$===MM/dd/yyyy HH:mm:ss
^\d{4}/\d{1,2}/\d{1,2}\s\d{1,2}:\d{2}:\d{2}$===yyyy/MM/dd HH:mm:ss
^\d{1,2}-\d{1,2}-\d{4}\s\d{1,2}:\d{2}:\d{2}\.\d{3}$===dd-MM-yyyy HH:mm:ss.SSS
^\d{4}-\d{1,2}-\d{1,2}\s\d{1,2}:\d{2}:\d{2}\.\d{3}$===yyyy-MM-dd HH:mm:ss.SSS
^\d{1,2}/\d{1,2}/\d{4}\s\d{1,2}:\d{2}:\d{2}\.\d{3}$===MM/dd/yyyy HH:mm:ss.SSS
^\d{4}/\d{1,2}/\d{1,2}\s\d{1,2}:\d{2}:\d{2}\.\d{3}$===yyyy/MM/dd HH:mm:ss.SSS
^\d{1,2}\s[a-z]{3}\s\d{4}\s\d{1,2}:\d{2}:\d{2}$===dd MMM yyyy HH:mm:ss
^\d{1,2}\s[a-z]{4,}\s\d{4}\s\d{1,2}:\d{2}:\d{2}$===dd MMMM yyyy HH:mm:ss
^\d{1,2}\s[a-z]{3}\s\d{4}\s\d{1,2}:\d{2}:\d{2}\.\d{3}$===dd MMM yyyy HH:mm:ss.SSS
^\d{1,2}\s[a-z]{4,}\s\d{4}\s\d{1,2}:\d{2}:\d{2}\.\d{3}$===dd MMMM yyyy HH:mm:ss.SSS
^\d{4}-\d{1,2}-\d{1,2}[Tt]\d{1,2}:\d{2}:\d{2}$===yyyy-MM-dd'T'HH:mm:ss
^\d{4}-\d{1,2}-\d{1,2}[Tt]\d{1,2}:\d{2}:\d{2}\.\d{3}$===yyyy-MM-dd'T'HH:mm:ss.SSS
^\d{1,2}:\d{2}\s[AaPp][Mm]$===hh:mm a
^\d{1,2}:\d{2}:\d{2}\s[AaPp][Mm]$===hh:mm:ss a
```

--------------------------------

### Process Dataset Entry Without Modification

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/README.md

This JavaScript function demonstrates the simplest data processing rule for the IoT Data Simulator. It takes the current state, dataset entry, and device name as input, and returns the dataset entry unchanged, effectively replaying the data as is.

```JavaScript
function process(state, datasetEntry, deviceName) {
	    return datasetEntry;
    }
```

--------------------------------

### Send Query Message via STOMP

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Handles the click event for the 'Send' button. It retrieves the query content and the controller path from input fields, validates the path, generates a unique 'requestId' header, and then sends the message to the specified STOMP destination using 'stompClient.send()'.

```JavaScript
$(function(){
  var requestId = 1;
  $('#sendQuery').click(function(){
    var query = $('#query').val();
    var path = $('#path').val();
    if(path === ""){
      showResponse("Enter controller path! (e.g. /app/hello)");
      return false;
    }
    var headers = { requestId: ++requestId }
    stompClient.send(path, headers, query);
  });
});
```

--------------------------------

### Basic Styling for WebSocket Client UI

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Defines basic CSS styles for the WebSocket client user interface elements, including body font size, container padding, form control height, button margins, and text area positioning, to ensure a readable and functional layout.

```CSS
body { font-size: 20px; }
.container, .container>div { padding-top: 10px; }
.form-control { height: 50px; font-size: 20px; }
.btn-primary { margin-top: 10px; }
.col-xs-6 { overflow: hidden; }
.col-xs-6>div { padding-top: 15px; }
.col-xs-6 button { margin-top: 10px; float: right; }
textarea { margin-top: 30px; }
```

--------------------------------

### Subscribe to User Queue Sessions Status Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

This topic provides active session status information, including the message type, command processing result, and details about active sessions such as ID, state, and any associated errors.

```APIDOC
Topic: ./user/queue/sessions
Description: Active sesssions status information.
Payload:
  type:
    Type: string
    Description: "sessions_status_command_result" message type
  result:
    Type: string
    Description: command processing result. One of the following: "success" | "failure"
  errorMessage:
    Type: string
    Description: contains error description in case of result: "failure"
  statuses:
    Type: array(object)
    Description: active sessions statuses
    Properties:
      sessionId:
        Type: string
        Description: session id property
      state:
        Type: string
        Description: current active session state. One of the following: "running" | "paused" | "completed" | "failed"
      errors:
        Type: array(string)
        Description: contains session errors in case of session state "failed"
Tags: session, status, command, result
```

--------------------------------

### Generate Data with JavaScript Function

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/README.md

This JavaScript function shows how to dynamically generate data within the IoT Data Simulator. It returns an object with a 'timestamp' property set to the current time using `moment().valueOf()`, allowing for on-the-fly data generation without a predefined dataset.

```JavaScript
function process(state, datasetEntry, deviceName) {
	    return {
	        timestamp: moment().valueOf()
	    }
    }
```

--------------------------------

### Subscribe to Session Status Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

This topic provides real-time status updates for a specific active session, including its current state (running, paused, completed, failed) and any associated errors.

```APIDOC
Topic: ./topic/sessions.:sessionId
Description: Active sesssions status result message.
Payload:
  type:
    Type: string
    Description: "session_status" message type
  status:
    Type: object
    Properties:
      sessionId:
        Type: string
        Description: session id property
      state:
        Type: string
        Description: current active session state. One of the following: "running" | "paused" | "completed" | "failed"
      errors:
        Type: array(string)
        Description: contains session errors in case of session state "failed"
Tags: session, status
```

--------------------------------

### Subscribe to User Queue Session Management Result Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

This topic delivers the results of session management commands for a specific session ID, indicating success or failure and providing an error message if applicable.

```APIDOC
Topic: ./user/queue/sessions.:sessionId
Description: Active sesssion managemnt command result.
Payload:
  type:
    Type: string
    Description: "session_management_command_result" message type
  sessionId:
    Type: string
    Description: session id property
  result:
    Type: string
    Description: command processing result. One of the following: "success" | "failure"
  errorMessage:
    Type: string
    Description: contains error description in case of result: "failure"
Tags: sessions, management, command, result
```

--------------------------------

### Subscribe to STOMP Destination

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Handles the click event for the 'Subscribe' button. It retrieves the subscription destination, validates it, and then subscribes the STOMP client to receive messages from that topic. A callback function is provided to display the body of received messages in the response area.

```JavaScript
$(function(){
  $('#subscribe').click(function(){
    var destination = $('#subscribtion').val();
    if(destination === ""){
      showResponse("Enter subscription path! (e.g. /topic/greetings)");
      return false;
    }
    stompClient.subscribe(destination, function(response) {
      showResponse(response.body);
    });
    showResponse("Subscription N: " + stompClient.counter + "\ndestination: " + destination);
  });
});
```

--------------------------------

### Subscribe to Session Analytics Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

This topic provides analytics messages related to a specific active session.

```APIDOC
Topic: ./topic/sessions.:sessionId.analytics
Description: Active sesssion analytics message.
```

--------------------------------

### Command Result Schema Definition

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines a simple schema for command processing results, indicating either 'success' or 'failure'.

```APIDOC
commandResult:
  commandResult: string - command processing result. One of the following: "success" | "failure"
```

--------------------------------

### Subscribe to User Queue Error Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

This topic is used to receive unexpected error messages generated by the service. The payload includes a string property for the error message.

```APIDOC
Topic: ./user/queue/error
Description: Services unexpected error message.
Payload:
  message:
    Type: string
    Description: error message property
Tags: error
```

--------------------------------

### Append Messages to Response Text Area

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Defines the 'showResponse' function, which appends new messages to the 'response' text area. It checks if the text area already contains content and adds two newline characters before appending the new message to ensure readability and separation of entries.

```JavaScript
function showResponse(message) {
  var $response = $('#response');
  if($response.val()){
    $response.append('\n\n');
  }
  $response.append(message);
}
```

--------------------------------

### Subscribe to Session Payload Topic

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

This topic delivers messages containing the processed payload data for a specific active session, including the session ID, the message content, and a Unix timestamp.

```APIDOC
Topic: ./topic/sessions.:sessionId.payload
Description: Active sesssions processed payload message.
Payload:
  type:
    Type: string
    Description: "session_payload" message type
  sessionId:
    Type: string
    Description: session id property
  message:
    Type: string
    Description: session payload message which has been successfully sent to external target system
  timestamp:
    Type: number
    Description: unix format timestamp
Tags: session, payload
```

--------------------------------

### JavaScript Function for Counter in IoT Data Simulator

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/README.md

This JavaScript function demonstrates how to implement a simple counter that persists its state across data processing iterations within the IoT Data Simulator. It uses the 'ruleState' object to store and increment the counter value, ensuring the count increases with each iteration.

```javascript
function custom(ruleState, sessionState, deviceName) { 
    if(typeof ruleState.counter === 'undefined') { 
        ruleState.counter = 0;
    }
    ruleState.counter++
    return ruleState.counter;
}
```

--------------------------------

### Session Status Schema Definition

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the schema for a session's status, including its ID, current state (running, paused, completed, failed), and any associated errors.

```APIDOC
sessionStatus:
  sessionId: string - session id property
  state: string - current active session state. One of the following: "running" | "paused" | "completed" | "failed"
  errors: array(string) - contains session errors in case of session state "failed"
```

--------------------------------

### Session Statuses Command Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines an empty message used to trigger the provision of all active session statuses. This message serves as a command without specific parameters.

```APIDOC
sessionStatusesCommandMessage:
  Payload: (empty message)
```

--------------------------------

### API Reference: commandErrorMessage

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Documents the `commandErrorMessage` field, which is a string type used to provide error details when an operation fails. It is typically found in API responses.

```APIDOC
commandErrorMessage:
  Name: commandErrorMessage
  Title: 
  Type: string
  Format: 
  Default: 
  Description: contains error description in case of result: "failure"
```

--------------------------------

### Session Management Command Result Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for the result of a session management command. It indicates success or failure, includes the session ID, and provides an error description if the command failed.

```APIDOC
sessionManagementCommandResultMessage:
  Payload:
    type: string - "session_management_command_result" message type
    sessionId: string - session id property
    result: string - command processing result. One of the following: "success" | "failure"
    errorMessage: string - contains error description in case of result: "failure"
```

--------------------------------

### Session Analytics Message Payload (Initial Definition)

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the structure for session analytics messages, including type, tag, session ID, message content, and timestamp. This is the initial definition found in the document, associated with 'session analytics' tags.

```APIDOC
Payload:
  type: string - "session_analytics" message type
  tag: string - session analytics tag. One of the following: "sessions_started" | "session_completed" | "session_paused" | "session_failed"
  sessionId: string - session id property
  message: string - session analytics message
  timestamp: number - unix format timestamp
```

--------------------------------

### Session Error Message Payload (Subscription Topic)

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for active session error messages, typically received on the './topic/sessions.:sessionId.errors' subscription topic. It includes the message type, session ID, error message content, and timestamp.

```APIDOC
Subscribe ./topic/sessions.:sessionId.errors:
  Payload:
    type: string - "session_error" message type
    sessionId: string - session id property
    message: string - error message
    timestamp: number - unix format timestamp
```

--------------------------------

### Session Statuses Command Result Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for the result of a session statuses command. It provides information about active sessions, including their IDs, current states, and any associated errors, along with the overall command result.

```APIDOC
sessionStatusesCommandResultMessage:
  Payload:
    type: string - "sessions_status_command_result" message type
    result: string - command processing result. One of the following: "success" | "failure"
    errorMessage: string - contains error description in case of result: "failure"
    statuses: array(object) - active sessions statuses
      sessionId: string - session id property
      state: string - current active session state. One of the following: "running" | "paused" | "completed" | "failed"
      errors: array(string) - contains session errors in case of session state "failed"
```

--------------------------------

### General Error Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for a general unexpected error message, containing only the error message property.

```APIDOC
errorMessage:
  Payload:
    message: string - error message property
```

--------------------------------

### Session Status Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for a single active session's status result message. It includes the message type and a detailed status object containing the session ID, current state, and any errors.

```APIDOC
sessionStatusMessage:
  Payload:
    type: string - "session_status" message type
    status: object
      sessionId: string - session id property
      state: string - current active session state. One of the following: "running" | "paused" | "completed" | "failed"
      errors: array(string) - contains session errors in case of session state "failed"
```

--------------------------------

### Clear Response Text Area

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Handles the click event for the 'Clear' button. When clicked, it sets the text content of the 'response' text area to an empty string, effectively clearing all displayed messages.

```JavaScript
$(function(){
  $('#clearTextArea').click(function(){
    $('#response').text("");
  });
});
```

--------------------------------

### Sessions Error Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for active session error messages, including the message type, session ID, the error message content, and a timestamp.

```APIDOC
sessionsErrorMessage:
  Payload:
    type: string - "session_error" message type
    sessionId: string - session id property
    message: string - error message
    timestamp: number - unix format timestamp
```

--------------------------------

### Sessions Analytics Message Payload

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for active session analytics messages, including type, tag, session ID, message content, and timestamp. This message provides insights into session lifecycle events.

```APIDOC
sessionsAnalyticsMessage:
  Payload:
    type: string - "session_analytics" message type
    tag: string - session analytics tag. One of the following: "sessions_started" | "session_completed" | "session_paused" | "session_failed"
    sessionId: string - session id property
    message: string - session analytics message
    timestamp: number - unix format timestamp
```

--------------------------------

### Disconnect from WebSocket Server

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-client.html

Handles the click event for the 'Disconnect' button. It calls the 'disconnect' method on the 'stompClient' object, effectively closing the WebSocket connection. After disconnection, it updates the UI state to reflect the disconnected status and displays a 'Disconnected' message.

```JavaScript
$(function(){
  $('#disconnect').click(function() {
    stompClient.disconnect();
    setConnected(false);
    showResponse("Disconnected");
  });
});
```

--------------------------------

### Sessions Processed Payload Message

Source: https://github.com/iba-group-it/iot-data-simulator/blob/master/services/src/main/resources/static/ws-api.html

Defines the payload for messages indicating a session's payload has been successfully sent to an external target system. It includes the message type, session ID, the sent message content, and a timestamp.

```APIDOC
sessionsPayloadMessage:
  Payload:
    type: string - "session_payload" message type
    sessionId: string - session id property
    message: string - session payload message which has been successfully sent to external target system
    timestamp: number - unix format timestamp
```

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