COINCAN Watchface

A comprehensive Pebble smartwatch face featuring Bitcoin price tracking, weather information, and time display.

Display Elements

Time Display

• Large, centered digital time in hours and minutes
• Automatically adjusts vertical position based on seconds ticker visibility

Date Display

• Day of week and date shown at the top center

Bitcoin Information

• Current Bitcoin price (center-left)
• 24-hour high price (top-left)
• 24-hour low price (bottom-left)
• Price graph showing historical trend (right side)
• Automatically adjusts vertical position based on seconds ticker visibility

Weather Information

• Current temperature
• Wind speed and direction
• Weather icons showing current conditions
• High/low forecast temperatures
• Location name from GPS

Visual Indicators

• Bluetooth connection status indicator
• Battery level indicator
• Step count display (when health tracking enabled)
  • Compares today's steps to yesterday's total
  • White portion fills first (up to yesterday's count)
  • Black portion fills when exceeding yesterday's count
  • Visual motivation to beat previous day's activity

Configuration Options

Seconds Ticker (Trotteuse)

• Toggle on/off to show/hide the seconds hand
• Default: Disabled
• When disabled, time and Bitcoin info shift down for better visual balance

Health Display

• Toggle on/off to show/hide step count
• Default: Disabled
• Affects trotteuse layout when both are enabled

Temperature Units

• Choose between Celsius and Fahrenheit
• Default: Celsius

Bitcoin Currency

• Uses Kraken exchange for Bitcoin price data
• Select display currency: USD (default), CAD, or EUR
• Shows BTC price in your preferred currency

Location

• GPS automatic only - always uses device location
• Automatically finds nearest weather station based on GPS coordinates

Weather Service

• Environnement Canada (default) - Canadian weather data
• Open-Meteo - International weather service
• Both use GPS coordinates to fetch weather data

Update Cadence

• Weather/Bitcoin update frequency
• Options: 1 minute or 3 minutes
• Default: 3 minutes
• Restricted to these two values for optimal battery life

Technical Details

Platform Support

• Pebble Classic (aplite)
• Pebble Time (basalt)
• Pebble Time Round (chalk)
• Pebble 2 (diorite)
• Pebble Time 2 (emery)

Data Sources

• Bitcoin prices via Kraken API
• Weather data via Environnement Canada API or Open-Meteo API
• Location via OpenStreetMap Nominatim geocoding
• GPS coordinates from device

Memory Usage

• Optimized for low memory devices
• Efficient resource management
• Persistent storage for settings

User Interface

Layout

• Top section: Date and Bitcoin high/low values
• Center section: Large time display with Bitcoin price to left and graph to right
• Bottom section: Weather information with icons
• Dynamic positioning ensures optimal spacing regardless of configuration

Color Support

• Full color display on color-capable Pebble models
• Optimized black and white display on monochrome models

Updates & Connectivity

Automatic Updates

• Weather and Bitcoin prices update based on configured cadence
• Initial fetch occurs 3 seconds after app launch
• Subsequent updates follow cadence schedule

Connectivity

• Requires Bluetooth connection to phone
• Uses Pebble's AppMessage system for data transfer
• JavaScript component handles API requests on phone

Development

Building

pebble build

Installing

pebble install

Screenshots

pebble screenshot screenshot.png

License

See LICENSE file for details.