1  # SPDX-FileCopyrightText: 2019 Kattni Rembor, written for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: Unlicense
 4  """Calculate the height of an object. Press button A to reset initial height and then lift the
 5  CLUE to find the height."""
 6  from adafruit_clue import clue
 7  
 8  # Set to the sea level pressure in hPa at your location for the most accurate altitude measurement.
 9  clue.sea_level_pressure = 1015
10  
11  clue_display = clue.simple_text_display(
12      text_scale=2,
13      colors=(clue.CYAN, 0, clue.RED, clue.RED, 0, clue.YELLOW, 0, clue.GREEN),
14  )
15  
16  initial_height = clue.altitude
17  
18  clue_display[0].text = "Calculate height!"
19  clue_display[2].text = "Press A to reset"
20  clue_display[3].text = "initial height!"
21  
22  while True:
23      if clue.button_a:
24          initial_height = clue.altitude
25          clue.pixel.fill(clue.RED)
26      else:
27          clue.pixel.fill(0)
28  
29      clue_display[5].text = "Altitude: {:.1f} m".format(clue.altitude)
30      clue_display[7].text = "Height: {:.1f} m".format(clue.altitude - initial_height)
31      clue_display.show()