Timers

Detailed information about this class can be found in Timer.

Chronometer

The Chronometer can be used to measure how much time has elapsed in a block of code. The following example uses a simple stopwatch.

from machine import Timer
import time

chrono = Timer.Chrono()

chrono.start()
time.sleep(1.25) # simulate the first lap took 1.25 seconds
lap = chrono.read() # read elapsed time without stopping
time.sleep(1.5)
chrono.stop()
total = chrono.read()

print()
print("\nthe racer took %f seconds to finish the race" % total)
print("  %f seconds in the first lap" % lap)
print("  %f seconds in the last lap" % (total - lap))

Alarm

The Alarm can be used to get interrupts at a specific interval. The following code executes a callback every second for 10 seconds.

from machine import Timer

class Clock:

    def __init__(self):
        self.seconds = 0
        self.__alarm = Timer.Alarm(self._seconds_handler, 1, periodic=True)

    def _seconds_handler(self, alarm):
        self.seconds += 1
        print("%02d seconds have passed" % self.seconds)
        if self.seconds == 10:
            alarm.callback(None) # stop counting after 10 seconds

clock = Clock()