#########
StopWatch
#########

.. include:: ../refs/controllers.stopwatch.ref

Support the following products:

    |StopWatch|

UiFlow2 Example
---------------

RTC Clock
^^^^^^^^^

Open the |stopwatch_rtc_example.m5f2| project in UiFlow2.

This example displays a digital clock (HH:MM:SS) on the round screen, reading time from the built-in RTC. Press **BtnA** to cycle through hour, minute, and second adjustment modes (the active field is highlighted in red). Press **BtnB** to increment the selected field. After adjusting seconds, press **BtnA** again to write the new time to the RTC.

UiFlow2 Code Block:

    |stopwatch_rtc_example.png|

Example output:

    None

Power Management
^^^^^^^^^^^^^^^^

Open the |stopwatch_power_example.m5f2| project in UiFlow2.

This example monitors USB, battery, and Grove port voltages, and shows charging status (battery text turns green while charging). Press **BtnA** to toggle Grove external output (5V OUT). Press **BtnB** to toggle battery charging.

UiFlow2 Code Block:

    |stopwatch_power_example.png|

Example output:

    None

Audio Recording and Playback
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Open the |stopwatch_aduio_example.m5f2| project in UiFlow2.

This example demonstrates audio recording and playback. Press **BtnA** to start a 5-second recording (countdown shown on screen). Press **BtnB** to play back the recorded file when not recording. The UI shows **Idle**, **Recording...**, or **Playing...** status.

UiFlow2 Code Block:

    |stopwatch_aduio_example.png|

Example output:

    None

MicroPython Example
-------------------

RTC Clock
^^^^^^^^^

This example displays a digital clock (HH:MM:SS) on the round screen, reading time from the built-in RTC. Press **BtnA** to cycle through hour, minute, and second adjustment modes (the active field is highlighted in red). Press **BtnB** to increment the selected field. After adjusting seconds, press **BtnA** again to write the new time to the RTC.

MicroPython Code Block:

    .. literalinclude:: ../../../examples/controllers/stopwatch/stopwatch_rtc_example.py
        :language: python
        :linenos:

Example output:

    None

Power Management
^^^^^^^^^^^^^^^^

This example monitors USB, battery, and Grove port voltages, and shows charging status (battery text turns green while charging). Press **BtnA** to toggle Grove external output (5V OUT). Press **BtnB** to toggle battery charging.

MicroPython Code Block:

    .. literalinclude:: ../../../examples/controllers/stopwatch/stopwatch_power_example.py
        :language: python
        :linenos:

Example output:

    None

Audio Recording and Playback
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

This example demonstrates audio recording and playback. Press **BtnA** to start a 5-second recording (countdown shown on screen). Press **BtnB** to play back the recorded file when not recording. The UI shows **Idle**, **Recording...**, or **Playing...** status.

MicroPython Code Block:

    .. literalinclude:: ../../../examples/controllers/stopwatch/stopwatch_aduio_example.py
        :language: python
        :linenos:

Example output:

    None