Adding code for BLE Buzzy Box
Code for BLE Buzzy Box Learn Guide. Feather NRF52840 with a DRV2605 haptic motor driver. When a notification arrives from ANCS it vibrates & onboard NeoPixel flashes. Also vibrates and flashes on the hour for mindfulness reminder
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BlitzCityDIY
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BLE_Buzzy_Box/code.py
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BLE_Buzzy_Box/code.py
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import time
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import board
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import busio
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import neopixel
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import adafruit_drv2605
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import adafruit_ble
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from adafruit_ble.advertising.standard import SolicitServicesAdvertisement
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from adafruit_ble.services.standard import CurrentTimeService
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from adafruit_ble_apple_notification_center import AppleNotificationCenterService
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from digitalio import DigitalInOut, Direction
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# setup for onboard NeoPixel
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pixel_pin = board.NEOPIXEL
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num_pixels = 1
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pixel = neopixel.NeoPixel(pixel_pin, num_pixels, brightness=0.3, auto_write=False)
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# setup for haptic motor driver
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i2c = busio.I2C(board.SCL, board.SDA)
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drv = adafruit_drv2605.DRV2605(i2c)
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# onboard blue LED
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blue_led = DigitalInOut(board.BLUE_LED)
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blue_led.direction = Direction.OUTPUT
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# setup for BLE
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ble = adafruit_ble.BLERadio()
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if ble.connected:
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for c in ble.connections:
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c.disconnect()
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advertisement = SolicitServicesAdvertisement()
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# adds ANCS and current time services for BLE to advertise
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advertisement.solicited_services.append(AppleNotificationCenterService)
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advertisement.solicited_services.append(CurrentTimeService)
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# state machines
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current_notification = None # tracks the current notification from ANCS
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current_notifications = {} # array to hold all current notifications from ANCS
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cleared = False # state to track if notifications have been cleared from ANCS
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notification_service = None # holds the array of active notifications from ANCS
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all_ids = [] # array to hold all of the ids from ANCS
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hour = 0 # used to track when it is on the hour for the mindfulness reminder
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mindful = False # state used to track if it is time for mindfulness
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vibration = 16 # vibration effect being used for the haptic motor
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blue = (0, 0, 255) # color blue for the NeoPixel
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purple = (255, 0, 255) # color purple for the NeoPixel
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red = (255, 0, 0) # color red for the NeoPixel
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clear = (0, 0, 0) # allows for NeoPixel to be turned 'off'
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# function for blinking NeoPixel
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# blinks: # of blinks
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# speed: how fast/slow blinks
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# color1: first color
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# color2: second color
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def blink_pixel(blinks, speed, color1, color2):
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for _ in range(0, blinks):
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pixel.fill(color1)
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pixel.show()
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time.sleep(speed)
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pixel.fill(color2)
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pixel.show()
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time.sleep(speed)
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# function for haptic motor vibration
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# num_zzz: # of times vibrates
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# effect: type of vibration
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# delay: time between vibrations
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def vibe(num_zzz, effect, delay):
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drv.sequence[0] = adafruit_drv2605.Effect(effect)
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for _ in range(0, num_zzz):
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drv.play() # play the effect
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time.sleep(delay) # for 0.5 seconds
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drv.stop()
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# start BLE
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ble.start_advertising(advertisement)
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while True:
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blue_led.value = False
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print("Waiting for connection")
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# NeoPixel is red when not connected to BLE
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while not ble.connected:
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blue_led.value = False
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pixel.fill(red)
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pixel.show()
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print("Connected")
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while ble.connected:
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blue_led.value = True # blue LED is on when connected
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all_ids.clear()
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for connection in ble.connections:
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if not connection.paired:
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# pairs to phone
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connection.pair()
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print("paired")
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# allows connection to CurrentTimeService
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cts = connection[CurrentTimeService]
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notification_service = connection[AppleNotificationCenterService]
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# grabs notifications from ANCS
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current_notifications = notification_service.active_notifications
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for notif_id in current_notifications:
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# adds notifications into array
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notification = current_notifications[notif_id]
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all_ids.append(notif_id)
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if current_notification and current_notification.removed:
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# Stop showing the latest and show that there are no new notifications.
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current_notification = None
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pixel.fill(clear)
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pixel.show()
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if not current_notification and not all_ids and not cleared:
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# updates cleared state for notification
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cleared = True
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# turns off NeoPixel when notifications are clear
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pixel.fill(clear)
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pixel.show()
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elif all_ids:
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cleared = False
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if current_notification and current_notification.id in all_ids:
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index = all_ids.index(current_notification.id)
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else:
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index = len(all_ids) - 1
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notif_id = all_ids[index]
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# if there is a notification:
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if not current_notification or current_notification.id != notif_id:
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current_notification = current_notifications[notif_id]
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# parses notification info into a string
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category = str(notification).split(" ", 1)[0]
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# haptic motor vibrates
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vibe(2, vibration, 0.5)
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# all info for notification is printed to REPL
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print('-'*36)
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print("Msg #%d - Category %s" % (notification.id, category))
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print("From app:", notification.app_id)
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if notification.title:
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print("Title:", notification.title)
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if notification.subtitle:
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print("Subtitle:", notification.subtitle)
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if notification.message:
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print("Message:", notification.message)
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# NeoPixel blinks and then stays on until cleared
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blink_pixel(2, 0.5, purple, clear)
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pixel.fill(purple)
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pixel.show()
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# if it's on the hour:
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if cts.current_time[4] == hour and not mindful:
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print(cts.current_time[4])
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print("mindful time")
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# haptic motor vibrates
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vibe(5, vibration, 1)
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# NeoPixel blinks and then stays on
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blink_pixel(5, 1, blue, clear)
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mindful = True
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pixel.fill(blue)
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pixel.show()
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print("hour = ", hour)
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# if it's no longer on the hour:
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if cts.current_time[4] == (hour + 1) and mindful:
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# NeoPixel turns off
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mindful = False
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pixel.fill(clear)
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pixel.show()
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print("mindful time over")
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# if BLE becomes disconnected then blue LED turns off
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# and BLE begins advertising again to reconnect
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print("Disconnected")
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blue_led.value = False
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print()
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ble.start_advertising(advertisement)
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notification_service = None
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