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I have a strange behaviour. Sometimes I get an error:

module 'motion' has no attribute 'start_updates'

And I can't see why... If I try the "Motion Plot.py" example and than my sources, it works.

I did an thread for the getting the motion movement:

# -*- coding: utf-8 -*-

from threading import Thread
import motion
from time import sleep


class SteeringThread(Thread):
    def __init__(self, label = None):
        # Init the thread
        Thread.__init__(self)

        # Set the name of this thread
        self.setName('SteeringThread')

        # Set the running flag of this thread
        self.__running = True

        # Motion updates
        motion.start_updates()
        sleep(0.5)

        # Get the first gravity value
        self.__gravity = motion.get_gravity()

    def terminate(self):
        """
        Terminate the thread itself.
        """
        self.__running = False

        motion.stop_updates()

    @property
    def gravity(self):
        """
        Returns the actual gravity value.
        """
        return self.__gravity

    def run(self):
        """
        Run this thread.
        """

        # Run
        while self.__running:
            print('X: %f | Y: %f | Z: %f' % (self.__gravity[0], self.__gravity[1], self.__gravity[2]))

            # Get the gravity values
            self.__gravity = motion.get_gravity()

            # Timing of the loop
            sleep(.8)

And it will used in:

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

from steering import SteeringThread
import time


def main():
    try:
        # Create the steering task
        steering = SteeringThread()
        steering.start()
        time.sleep(20.0)
        steering.terminate()
        steering.join()
    except Exception as e:
        print(e)
    finally:
        exit()


if __name__ == '__main__':
    main()

That is all...

Forum Archive

Motion module -> sometimes it doesn't find?