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UART Smartwatch

Bluetooth App for a UART-Smartwatch

NOTE: This app is no longer maintained, its repo was archived.

This is a bluetooth low energy UART terminal app for a do-it-yourself Smartwatch.

App features:

  • notification buffer
  • is notification to long: use of notification title
  • some emoticons works
  • german Umlaute works
  • transmit more than 20 bytes
  • automatic reconnect

Get firmware, screenshots, documentation and circuit from UART-Smartwatch Website.

UART-Smartwatch firmware features:

  • Press Button 1.5 s: sync the time between watch and phone. Show date and notifications as scrolling chars.
  • Press Button 0.5 s: show the time calculated by the watch. Show the battery level and an analog clock
  • small analog clock
  • digital clock
  • Battery Level
  • more than 18 hours with LiPo 3.7V (170mA)

The DIY smartwatch shows a calculated time without a connection to your phone. This time is a bit faster to pretent problems. It is about 10 second in 6 hours.

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Packages

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 3.2 (32) suggested Added on 2017-08-02

    This version requires Android 4.4 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • pair with Bluetooth devices
      Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
    • access Bluetooth settings
      Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
    • access precise location only in the foreground
      This app can get your exact location only when it is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them. This may increase battery consumption.

    Download APK 1.3 MiB PGP Signature | Build Log

  • Version 3.1 (31) - Added on 2017-05-29

    This version requires Android 4.4 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • pair with Bluetooth devices
      Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
    • access Bluetooth settings
      Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
    • access precise location only in the foreground
      This app can get your exact location only when it is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them. This may increase battery consumption.

    Download APK 1.3 MiB PGP Signature | Build Log

  • Version 3.0 (30) - Added on 2017-02-20

    This version requires Android 4.4 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • pair with Bluetooth devices
      Allows the app to view the configuration of the Bluetooth on the phone, and to make and accept connections with paired devices.
    • access Bluetooth settings
      Allows the app to configure the local Bluetooth phone, and to discover and pair with remote devices.
    • access precise location only in the foreground
      This app can get your exact location only when it is in the foreground. These location services must be turned on and available on your phone for the app to be able to use them. This may increase battery consumption.

    Download APK 0.5 MiB PGP Signature | Build Log