Countdown Watchface

A clean Pebble watchface with a top progress bar that counts down to your next half-hour mark or upcoming calendar appointment.

Features

• Time — large 24-hour format (HH:MM) using the Roboto Bold 49 font
• Date — day/month number (DD/MM) in Gothic 28 Bold below the time
• Countdown bar — 8px bar across the top of the screen:
  • Starts full at the top of each half hour and drains to empty as it approaches :00 or :30
  • If a calendar appointment is within the next 30 minutes, the bar counts down to that instead
  • Requires Google Calendar API setup (see below); falls back to half-hour countdown without it
• Battery bar — thin 4px indicator along the bottom edge

Supported platforms

aplite, basalt, diorite, emery, flint

Building

Requires the Pebble SDK (version 3).

cd countdown_watchface
pebble build

Install on a connected watch or emulator:

pebble install --phone <watch-ip>
# or
pebble install --emulator basalt

Calendar integration (optional)

The watchface uses Google Calendar API to detect appointments within the next 30 minutes. Without this, the bar simply counts down to the next :00 or :30.

Setup:

1. Create a Google Cloud project and enable the Google Calendar API.
2. Generate an API key (restrict it to the Calendar API and your IP/app if desired).
3. In the Pebble phone app's JS console (or via a config page), run:

localStorage.setItem('gcal_api_key', 'YOUR_API_KEY_HERE');

The calendar ID defaults to primary. To use a different calendar, edit src/pkjs/index.js and change the CALENDAR_ID variable.

The phone-side JS polls for events every minute and sends the minutes-to-appointment to the watch via AppMessage. If the API call fails or no key is set, the watch falls back to the half-hour countdown automatically.