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