PineTime PulseTime (Metronome)

README.md

PulseTime for wasp-os

Problem

• Soundbrenner Smartwatch is expensive (197 eur)
• Existing Apple Watch apps either don’t fulfil the requirement of having haptic vibration or offer unreasonable subscription-based business model
• Publishing new Apple Watch app would cost me 100/year + take effort learning their programming language and frameworks

Pine64 PineTime comes to rescue

• very affordable, 20 eur
• open-source platform
• has vibration sensor
• python sdk

pulse.py

import wasp
from time import sleep #, perf_counter
import _thread

class PulseApp():
    """A metronome application for wasp-os."""
    NAME = "Pulse"

    def __init__(self):
        self._metronome_spinner = wasp.widgets.Spinner(90, 60, 1, 200)
        self._metronome_toggle = wasp.widgets.Button(0, 200, 240, 40, "START / STOP")
        self._metronome_spinner.value = 120
        self._metronome_activated = False

    # Metronome
    def _metronome(self):
        delay = d = (60 / self._metronome_spinner.value) - 0.01
        #prev = perf_counter()

        while True:
            if not self._metronome_activated:
                break

            sleep(d)
            #t = perf_counter()
            #delta = t - prev - delay
            wasp.watch.vibrator.pulse(50, 100)
            #print("Pulse")
            #d -= delta
            #prev = t

    # Start metronome by creating a new thread with _metronome as target
    def _start_metronome(self):
        self._metronome_activated = True
        _thread.start_new_thread(self._metronome, ())
        print("Started", self._metronome_spinner.value)

    # Stop running metronome by overriding _metronome_activated value and joining the threads
    def _stop_metronome(self):
        self._metronome_activated = False
        try:
            _thread.exit()
        except SystemExit:
            print("Stopped")

    # Start or stop metronome depending if it's deactivated or activated, respectivly
    def _toggle_metronome(self):
        if self._metronome_activated:
            self._stop_metronome()
        else:
            self._start_metronome()

    def foreground(self):
        self._draw()
        wasp.system.request_event(wasp.EventMask.TOUCH |
                                  wasp.EventMask.BUTTON)
        wasp.system.request_tick(1000)

    def press(self, button, state):
        if state == True:
            self._toggle_metronome()

    def touch(self, event):
        if self._metronome_spinner.touch(event):
            if self._metronome_activated:
                self._stop_metronome()

        if self._metronome_toggle.touch(event):
            self._toggle_metronome()

    # Keep the screen awake to avoid messing with latency
    def tick(self, _ticks):
        wasp.system.keep_awake()

    def _draw(self):
        draw = wasp.watch.drawable
        draw.fill()
        draw.string("PulseTime", 0, 6, width=240)
        draw.string("BPM", 165, 115, width=40)
        self._metronome_spinner.draw()
        self._metronome_toggle.draw()