34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
# datalogger.py
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# Logs the data from the acceleromter to a file on the SD-card
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import pyb
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# creating objects
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accel = pyb.Accel()
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blue = pyb.LED(4)
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switch = pyb.Switch()
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# loop
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while True:
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# wait for interrupt
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# this reduces power consumption while waiting for switch press
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pyb.wfi()
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# start if switch is pressed
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if switch():
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pyb.delay(200) # delay avoids detection of multiple presses
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blue.on() # blue LED indicates file open
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log = open('/sd/log.csv', 'w') # open file on SD (SD: '/sd/', flash: '/flash/)
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# until switch is pressed again
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while not switch():
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t = pyb.millis() # get time
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x, y, z = accel.filtered_xyz() # get acceleration data
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log.write('{},{},{},{}\n'.format(t,x,y,z)) # write data to file
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# end after switch is pressed again
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log.close() # close file
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blue.off() # blue LED indicates file closed
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pyb.delay(200) # delay avoids detection of multiple presses
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