ThermoTask

A macOS app that brings your Apple Calendar events and Reminders together in one view — and lets you print them as retro-style thermal tickets on a Niimbot label printer.


About · Demo · Features · Installation · Getting Started
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About

ThermoTask is a macOS app that brings your Apple Calendar events and Reminders together in a unified daily view — and lets you print them as retro-style thermal tickets on a Niimbot Bluetooth label printer.

The app includes a built-in Swift implementation of the Niimbot BLE protocol (ported from niimbluelib), enabling direct communication with the printer without any external runtime or Node.js dependency.

Demo

Features

Feature	Description
Create, Edit & Delete	Manage calendar events and reminders for any date side by side
Thermal Ticket Rendering	384px-wide PNG tickets at 203 DPI with a retro receipt aesthetic
Bulk Print	Select multiple items and print them sequentially to a thermal printer
Live Sync	Automatically refreshes when the EventKit store changes

Installation

1. Download ThermoTask.dmg file;
2. Drag ThermoTask.app to /Applications folder;

Important

If you see a message that the app cannot be opened because it is from an unidentified developer, follow these steps:

1. Open System Preferences > Security & Privacy Settings;
2. Look towards the bottom of the window for a message saying: "ThermoTask was blocked from use because it is not from an identified developer.";
3. Click Open Anyway (you may need to enter your admin password);
4. Click on the ThermoTask icon again in Finder;
5. A confirmation dialog will appear — click Open to confirm.

Requirements

• macOS 26.2+ (Tahoe)
• Xcode 26.2+
• A Niimbot Bluetooth label printer (only B1 series is supported) for printing features

Getting Started

1. Clone the repository.
2. Open ThermoTask.xcodeproj in Xcode.
3. Build and run (Cmd+R).
4. Grant Calendar, Reminders, and Bluetooth permissions when prompted.

Printing

The app communicates directly with Niimbot printers over Bluetooth Low Energy using a built-in Swift library (niimblue-swift).

Setup

The printer address must be set in PrintService.swift. To use your own printer:

1. Find your printer's Bluetooth address (e.g. B1-H11********).
2. Update the --address argument in PrintService.swift.
3. Ensure Bluetooth is enabled and the printer is powered on.

Warning

This project is intended for informational and educational purposes only. The project is not affiliated with or endorsed by the original software or hardware vendor, and is not intended to be used for commercial purposes without the consent of the vendor.

Credits

• niimbluelib for the open source implementation of the NIIMBOT printers protocol.
• App icon inspired from an original design by Hugo on macOSicons.

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.