Code for guide Exercise Buddy

Motion_Buddy/code.py

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+# SPDX-FileCopyrightText: 2022 Charlyn G for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+#
+# Code for the Adafruit Learning System tutorial
+#   Exercise Buddy: Motion aware BLE media controller
+#   https://learn.adafruit.com/exercise-buddy/overview
+#
+import time
+import board
+import supervisor
+
+import neopixel
+import adafruit_ble
+import adafruit_lis3dh
+from adafruit_ble.advertising.standard import SolicitServicesAdvertisement
+from adafruit_ble_apple_media import AppleMediaService, UnsupportedCommand
+
+# Initialize the accelerometer
+i2c = board.I2C()
+lis3dh = adafruit_lis3dh.LIS3DH_I2C(i2c)
+
+#  Initialize BLE radio
+radio = adafruit_ble.BLERadio()
+a = SolicitServicesAdvertisement()
+a.solicited_services.append(AppleMediaService)
+radio.start_advertising(a)
+
+# Neopixel indicator
+pixel_pin = board.NEOPIXEL
+pixel = neopixel.NeoPixel(pixel_pin, 1, brightness=0.5)
+YELLOW = (200, 150, 0)
+CYAN = (0, 100, 100)
+PINK = (231, 84, 128)
+pixel.fill(PINK)
+
+while not radio.connected:
+    pass
+
+print("connected")
+pixel.fill(YELLOW)
+
+# Initialize variables
+last_x = 0
+last_y = 0
+last_z = 0
+paused = True
+
+WAIT = 0.2
+WIGGLE_ROOM = 5  # Increase this for more jitter compensation.
+
+
+def is_same_pos(last_position, current_position):
+    # Returns true if current_position is similar enough
+    # to last_position, within the specified wiggle room.
+    diff = abs(current_position - last_position)
+    print((diff,))
+    return diff <= WIGGLE_ROOM
+
+
+def not_enough_movement(x, y, z):
+    same_x = is_same_pos(last_x, x)
+    same_y = is_same_pos(last_y, y)
+    same_z = is_same_pos(last_z, z)
+    return same_x and same_y and same_z
+
+
+while radio.connected:
+
+    for connection in radio.connections:
+        if not connection.paired:
+            connection.pair()
+            print("paired")
+            pixel.fill(PINK)
+            time.sleep(1)
+
+        if connection.paired:
+            pixel.fill(CYAN)
+            ams = connection[AppleMediaService]
+            print("app:", ams.player_name)
+
+            try:
+                xf, yf, zf = lis3dh.acceleration
+
+                if not_enough_movement(xf, yf, zf):
+                    # Keep pausing.
+                    print("pause!")
+                    paused = True
+                    ams.pause()
+
+                else:
+                    last_x = xf
+                    last_y = yf
+                    last_z = zf
+
+                    if paused:
+                        print("play!")
+                        paused = False
+                        ams.play()
+
+            except OSError:
+                supervisor.reload()
+            except UnsupportedCommand:
+                # This means that we tried to pause but there's
+                # probably nothing playing yet, so just wait a bit
+                # and try again.
+                pixel.fill(PINK)
+                time.sleep(10)
+                supervisor.reload()
+
+            time.sleep(WAIT)
+
+print("disconnected")
+pixel.fill(PINK)