LOT VSCode Notebooks Extension (v0.4.2)

LOT Notebooks is a Visual Studio Code extension that provides:

• A notebook interface for the LOT (Language of Things) DSL
• Integration with MQTT for live data and real-time updates
• A built-in chatbot command so you can easily open your external or custom chatbot (under dev)

Features

1. LOT Language Notebook

   • Create or open .lotnb notebooks recognized by this extension
   • Edit LOT code (DEFINE MODEL, DEFINE ACTION, etc.) in notebook cells
   • Execute your cells to run remove→add→subscribe logic with MQTT

2. MQTT Integration

   • Connect to an MQTT broker (credentials can be configured)
   • Subscribe/publish to topics
   • Listen for real-time messages from the broker, displayed in your LOT cells

3. Live Data Views

   • Renders numeric payloads in real-time with a custom JSON-based approach
   • Provides charting for numeric data.
   • Enhanced Payload Rendering: Automatically detects and renders various payload types from topic payloads:
     • JSON Breakdown: Expandable structures for JSON payloads.
     • Image Preview: View images from base64 encoded topic payloads directly in the live data view.
     • HTML Content: Renders HTML snippets in an iframe for preview.
     • Nested JSON & Base64 Detection: Intelligently extracts and renders JSON objects or long base64 strings embedded within larger payloads.

4. “Verification of the Status of the Broker”

   • Each Code cell shows if it is synced / unsynced / missing
   • There is a list of Components of the broker and their current standard in comparison to the Broker
   • A context menu is created for backup / copy code / restore or place in the project

5. Python Scripting (Experimental)

   • Write and execute Python scripts within notebook cells.
   • Scripts must start with # Script Name: [YourScriptName] comment for proper processing.
   • Seamlessly integrate Python logic with your LOT workflows.
   • Enforced Script Naming: All Python scripts require a specific header format for validation.
   • Python Script Management: View, manage, and remove Python scripts through the Coreflux Entities view.

Usage

1. Create a new .lotnb Notebook

   • Open Command Palette (Ctrl+Shift+P) → LOT Notebook: Create New Notebook
   • A new untitled .lotnb file opens with the LOT notebook UI.

2. Add Cells

   • Each cell can contain LOT code, e.g.

     DEFINE MODEL MyModel WITH TOPIC "XPTO" ...
     

   • The extension recognizes the lot language within .lnt notebooks.

3. Run Cells

   • Press the run icon on a cell or the top Notebook Run button
   • The extension executes remove→add→subscribe logic for the code

4. Configure MQTT

   • Use the command LOT Notebook: Change Credentials to set broker URL, username, password
   • The extension automatically connects when running a cell if not already connected

5. Open Chatbot

   • In the cell toolbar (the inline buttons), click Open Chatbot (it appears if the cell's language is lot)
   • The extension runs lot.openChatbot, which can open your external chatbot in a webview or external browser
   • Adjust this logic in your extension code if you want a different chatbot approach

6. Python Scripts Integration

   • Create Python scripts using Coreflux: Create Python Scripts command
   • All Python scripts must start with # Script Name: [YourScriptName] comment
   • View and manage Python scripts in the Coreflux Entities view
   • Remove individual scripts or all Python scripts using context menus

Commands Overview

LOT Notebook Commands

Coreflux Entity Management Commands

Bulk Management Commands

Development & Setup Commands

Python Scripts Integration

Script Format Requirements

All Python scripts in LOT notebooks must follow a specific format for proper processing:

# Script Name: [YourScriptName]
def your_function():
    return "Hello from Python!"

# Your Python code here...

Key Features

• Enforced Naming: Every Python script must start with # Script Name: [name] comment
• Validation: Scripts without proper headers will show clear error messages
• Integration: Python functions can be called from LOT actions using CALL statements
• Management: View and manage all Python scripts through the Coreflux Entities view
• Bulk Operations: Remove individual scripts or all Python scripts at once

Example Integration

Python Script:

# Script Name: Greeter
def say_hello(name="World"):
    return f"Hello, {name}!"

def calculate_temperature(celsius):
    return celsius * 9/5 + 32

LOT Action using Python:

DEFINE ACTION GreetingAction
ON EVERY 5 SECONDS DO {
    CALL Greeter.say_hello("LOT User")
    CALL Greeter.calculate_temperature(25)
}

Error Handling

If a Python script is missing the required header, you'll see:

Python script must start with "# Script Name: [name]" comment. Please add this comment at the beginning of your Python code.

Known Issues / Troubleshooting

• Cannot find module 'mqtt': Ensure mqtt is listed under "dependencies" in package.json and no .vscodeignore is excluding node_modules.
• No cell output: Double-check you used DEFINE MODEL|ACTION|RULE, so the extension's logic can parse your code.
• Chatbot not opening? By default, the command just shows an info message. Modify lot.openChatbot in extension.ts to open your actual webview or external URL.

Further Documentation and Links

• Coreflux.org: Coreflux is more than just a self-hosted MQTT broker; it also offers a cloud MQTT broker solution. The company's focus is on describing data-driven systems and connecting OT devices or events with IT systems via LOT Routes.
• Docs: Language of Things (LOT): Overview of what LOT is.
• Docs: LOT Syntax Reference: Detailed overview of LOT syntax categories, keywords, and operators.
• Docs: LOT Actions: Explains how to define and use LOT actions.
• Docs: LOT Models: Explains how models are set up and used in LOT.
• Docs: LOT Rules: Explains how to write and apply rules in LOT.

Release Notes

v0.4.2

• Enhanced Python Scripts Management:
  • Added comprehensive Python script validation with enforced naming format
  • Implemented # Script Name: [name] requirement for all Python scripts
  • Added Python scripts to Coreflux Entities view for easy management
  • New bulk operations: Remove All Python Scripts command
  • Improved error handling with clear validation messages
• Expanded Command Palette:
  • Added 25+ new Coreflux commands for comprehensive entity management
  • Organized commands into logical categories (Entity Management, Bulk Operations, Development)
  • Enhanced broker connection management with dedicated connect/disconnect commands
  • Added telemetry testing and walkthrough commands
• Improved User Experience:
  • Better command organization and discoverability
  • Enhanced error messages for Python script validation
  • Streamlined entity management workflow
  • Added comprehensive command documentation

v0.4.1

• Enhanced Walkthrough Experience:
  • Completely redesigned the onboarding walkthrough with beginner-friendly explanations
  • Added "What", "Why", and "How" sections to each step for better learning experience
  • Removed Docker Compose and GitHub setup steps to focus on core LOT functionality
  • Updated Python integration example to use timer-based actions instead of topic triggers
• Improved Python Integration:
  • Enhanced Python script templates with cleaner, more focused examples
  • Updated LOT action templates to use ON EVERY 5 SECONDS for automatic execution
  • Better integration between Python functions and LOT actions in walkthrough
• Simplified Docker Setup:
  • Updated Docker templates to use the official Coreflux MQTT broker image
  • Streamlined Docker Compose configuration with single-container setup
  • Removed separate Mosquitto configuration for easier deployment

v0.4.0

• Added LOT code Completions:
  • Dynamic Code completions for ACTIONS / ROUTES / MODELS / RULES
  • Beginning of Introduction of VISUS (still under development)
• Python Scripting (Experimental):
  • Added support for Python scripts in notebook cells, requiring a specific header format.
  • Integrated commands for creating and managing Python scripts.
• Enhanced Live Data Views:
  • Implemented advanced payload rendering for JSON, Base64 images, and HTML content directly within tree views.
  • Added capabilities for detecting and extracting nested JSON and long Base64 strings.
  • Improved charting for numeric data with dynamic type selection (e.g., Int8, Float32).

v0.3.0

• Added Coreflux Entities view:
  • Tree view displays Models, Actions, Rules, and Routes currently active on the connected MQTT broker.
  • Status icons indicate if an entity definition exists in the open workspace notebooks and if it's synchronized with the broker.
• Added Entity synchronization commands (available from context menu in Coreflux Entities view):
  • Update Broker from Cell: Pushes the code from the corresponding notebook cell to the broker.
  • Update Cell from Coreflux: Pulls the code from the broker into the corresponding notebook cell.
  • Create Definition in Notebook: Inserts a DEFINE statement for the entity at the cursor in the active notebook.
  • Remove Entity from Coreflux: Sends a command to remove the entity from the broker.
• Added Go To Definition for entities: Clicking an entity in the tree view navigates to its DEFINE statement in the corresponding notebook cell.

v0.2.5

• Added the Visu add/ remove commands for broker version >1.6

v0.2.1

• Polished MQTT credential handling
• Basic chart display for numeric data in cells

Thank You for Using LOT Notebooks!

Made by the Coreflux team with a LOT of love ❤️