Adding CLUE demos.

examples/clue_height_calculator.py

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+"""Calculate the height of an object. Press button A to reset initial height and then lift the
+CLUE to find the height."""
+from adafruit_clue import clue
+
+# Set to the sea level pressure in hPa at your location for the most accurate altitude measurement.
+clue.sea_level_pressure = 1015
+
+clue_data = clue.simple_text_display(text_scale=2, colors=((0, 255, 255), 0, (255, 0, 0),
+                                                           (255, 0, 0), 0, (255, 255, 0), 0,
+                                                           (0, 255, 0)))
+
+initial_height = clue.altitude
+
+clue_data[0].text = "Calculate height!"
+clue_data[2].text = "Press A to reset"
+clue_data[3].text = "initial height!"
+while True:
+    if clue.button_a:
+        initial_height = clue.altitude
+        clue.pixel.fill((255, 0, 0))
+    else:
+        clue.pixel.fill(0)
+    clue_data[5].text = "Altitude: {:.1f} m".format(clue.altitude)
+    clue_data[7].text = "Height: {:.1f} m".format(clue.altitude - initial_height)
+    clue_data.show()

examples/clue_spirit_level.py

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+"""CLUE Spirit Level Demo"""
+import board
+from adafruit_clue import clue
+from adafruit_display_shapes.circle import Circle
+import displayio
+
+display = board.DISPLAY
+group = displayio.Group(max_size=4)
+
+outer_circle = Circle(120, 120, 119, outline=(255, 255, 255))
+middle_circle = Circle(120, 120, 75, outline=(255, 255, 0))
+inner_circle = Circle(120, 120, 35, outline=(0, 255, 0))
+group.append(outer_circle)
+group.append(middle_circle)
+group.append(inner_circle)
+
+x, y, _ = clue.acceleration
+bubble_group = displayio.Group(max_size=1)
+level_bubble = Circle(int(x + 120), int(y + 120), 20, fill=(255, 0, 0), outline=(255, 0, 0))
+bubble_group.append(level_bubble)
+
+group.append(bubble_group)
+display.show(group)
+
+while True:
+    x, y, _ = clue.acceleration
+    bubble_group.x = int(x * 10)
+    bubble_group.y = int(y * 10)
+    display.show(group)

examples/clue_temperature_humidity_monitor.py

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+"""Monitor customisable temperature and humidity ranges, with an optional alarm."""
+from adafruit_clue import clue
+
+# Set desired temperature range in degrees Celsius.
+min_temp = 24
+max_temp = 30
+
+# Set desired humidity range in percent.
+min_humidity = 20
+max_humidity = 65
+
+# Set to true to enable alarm warning.
+alarm = False
+
+data = clue.simple_text_display(text_scale=3, colors=((255, 255, 255),))
+
+data[0].text = "Temperature &"
+data[1].text = "Humidity"
+while True:
+    alarm = False
+    temperature = clue.temperature
+    humidity = clue.humidity
+    data[3].text = "Temp: {:.1f} C".format(temperature)
+    data[5].text = "Humi: {:.1f} %".format(humidity)
+    if temperature < min_temp:
+        data[3].color = (0, 0, 255)
+        alarm = True
+    elif temperature > max_temp:
+        data[3].color = (255, 0, 0)
+        alarm = True
+    else:
+        data[3].color = (255, 255, 255)
+
+    if humidity < min_humidity:
+        data[5].color = (0, 0, 255)
+        alarm = True
+    elif humidity > max_humidity:
+        data[5].color = (255, 0, 0)
+        alarm = True
+    else:
+        data[5].color = (255, 255, 255)
+    data.show()
+
+    if alarm:
+        clue.start_tone(2000)
+    else:
+        clue.stop_tone()