Using LoT Notebooks

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Overview

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Before you start

• Visual Studio Code installed
• A Coreflux broker installed or in another machine you can reach

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Install and connect

1

Install the extension

Download the latest LoT Notebooks extension and install it in VS Code or Cursor. The same .vsix also works on an offline or air-gapped machine.

1. Download the latest LoT Notebooks .vsix from Portal Downloads. The install guide walks through these steps. For Cursor, use the Cursor install guide.
2. Open the Extensions view (Ctrl+Shift+X on Windows/Linux, Cmd+Shift+X on macOS). Drag the .vsix onto that view, or open the … menu, choose Install from VSIX…, and select the file.

You can also search the Extensions view for LoT Notebooks by Coreflux and install it from there.

2

Connect to the broker

1. Click on the MQTT Connection Status on bottom left corner of your VS Code or click Connect to Broker in the Data Viewer (Coreflux sidebar).
2. Enter your broker URL, username, and password.

Example URL and default login credentials

Use a full URL such as mqtt://localhost:1883 or mqtts://your-host:8883 for TLS.

Setting	Example (local defaults)
URL	mqtt://localhost:1883
Username	root
Password	coreflux (change immediately in production)

When you are connected, the status bar shows a green MQTT: Connected. If any issues occur, the status bar will become red.

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Create a LoT notebook and deploy your first LoT code

1. In the Activity Bar (left bar), open Coreflux.
2. Under PROJECT, use New File, give your LoT Notebook a name, and it will be created within the workspace folder you opened in VS Code.
3. Add a code cell from the notebook toolbar (+ Code). Optionally, add a Markdown cell (+ Markdown) to document your code.
4. Write or paste a LoT code (for example the Action below) and click Execute Cell icon on the cell or Run All option above.
   DEFINE ACTION Heartbeat
   ON EVERY 10 SECONDS DO
       PUBLISH TOPIC "system/heartbeat" WITH TIMESTAMP "UTC"
   
5. See the data change in the Data Viewer, by subscribing to all topics, just like MQTT Explorer. Additionally, you can click on a data topic to see it in more detail, including a replay of the data changes.

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Next Steps