I have been closely following the Wizard Staff tutorial at https://learn.adafruit.com/burning-fire-wizard-staff with just about identical components as to what was used in the tutorial. This includes a Feather M4 Express, Prop Maker Featherwing, JST-connected Neopixel strip, JST-connected mini speaker, tactical on/off switch and a 2200mAh Lithium Ion Battery from Adafruit.
When connected to MU, the code runs fine and the serial monitor displays all the expected output. Also, the get_voltage function displayed the battery is running at roughly 3.8 volts.
The problem comes when I unplug the USB connection and attempt to run the code off the LIPO power alone. When I connect the LIPO to the Featherwing with all peripherals attached, the LED will blink green 4 times rapidly and then nothing...
The code posted below includes a power switch function tied to pin D10 and my thinking is the issues may be related to this. I've tried multiple types of switches connected to the G and ENABLE pins as indicated in the tutorial, yet nothing seems to make any difference.
Any other suggestions will be greatly appreciated.
The code is at present copied verbatim from the tutorial-
Code: Select all
# SPDX-FileCopyrightText: 2019 Kattni Rembor Adafruit Industries
# SPDX-FileCopyrightText: 2019 Erin St Blaine for Adafruit Industries
# SPDX-FileCopyrightText: 2019 Limor Fried for Adafruit Industries
#
# SPDX-License-Identifier: MIT
"""
Prop-Maker based Burning Wizard Staff
Adafruit invests time and resources providing this open source code.
Please support Adafruit and open source hardware by purchasing
products from Adafruit!
Written by Kattni Rembor, Erin St Blaine & Limor Fried for Adafruit Industries
Copyright (c) 2020 Adafruit Industries
Licensed under the MIT license.
All text above must be included in any redistribution.
"""
import time
import random
import digitalio
import audioio
import audiocore
import board
import neopixel
import adafruit_lis3dh
# CHANGE TO MATCH YOUR RING AND STRIP SETUP
NUM_RING = 12 #12 pixel ring
NUM_STRIP = 44 # 44 pixels in my NeoPixel strip
NUM_PIXELS = NUM_STRIP + NUM_RING #total number of pixels
NEOPIXEL_PIN = board.D5 # PropMaker Wing uses D5 for NeoPixel plug
POWER_PIN = board.D10
# CUSTOMISE COLORS HERE:
COLOR = (200, 30, 0) # Default idle is orange
ALT_COLOR = (0, 200, 200) # hit color is teal
SWING_COLOR = (200, 200, 200) #swing animation color is white
TOP_COLOR = (100, 100, 0) #top color is yellow-green
YELL_COLOR = (200, 0, 200) #yell color is purple
# CUSTOMISE IDLE PULSE SPEED HERE: 0 is fast, above 0 slows down
IDLE_PULSE_SPEED = 0 # Default is 0 seconds
SWING_BLAST_SPEED = 0.007
# CUSTOMISE BRIGHTNESS HERE: must be a number between 0 and 1
IDLE_PULSE_BRIGHTNESS_MIN = 0.2 # Default minimum idle pulse brightness
IDLE_PULSE_BRIGHTNESS_MAX = 1 # Default maximum idle pulse brightness
# CUSTOMISE SENSITIVITY HERE: smaller numbers = more sensitive to motion
HIT_THRESHOLD = 1150
SWING_THRESHOLD = 800
YELL_THRESHOLD = 700
# Set to the length in seconds of the "on.wav" and "yell1.wav" files
POWER_ON_SOUND_DURATION = 3.0
YELL_SOUND_DURATION = 1.0
enable = digitalio.DigitalInOut(POWER_PIN)
enable.direction = digitalio.Direction.OUTPUT
enable.value = False
# Set up NeoPixels
strip = neopixel.NeoPixel(NEOPIXEL_PIN, NUM_PIXELS, brightness=1, auto_write=False)
strip.fill(0) # NeoPixels off ASAP on startup
strip.show()
audio = audioio.AudioOut(board.A0) # Speaker
wave_file = None
# Set up accelerometer on I2C bus, 4G range:
i2c = board.I2C() # uses board.SCL and board.SDA
# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
accel = adafruit_lis3dh.LIS3DH_I2C(i2c)
accel.range = adafruit_lis3dh.RANGE_4_G
COLOR_IDLE = COLOR # 'idle' color is the default for the staff handle
COLOR_HIT = ALT_COLOR # "hit" color is ALT_COLOR set above
COLOR_SWING = SWING_COLOR # "swing" color is SWING_COLOR set above
COLOR_TOP = TOP_COLOR #"top" color is idle color for the ring
def play_wav(name, loop=False):
"""
Play a WAV file in the 'sounds' directory.
:param name: partial file name string, complete name will be built around
this, e.g. passing 'foo' will play file 'sounds/foo.wav'.
:param loop: if True, sound will repeat indefinitely (until interrupted
by another sound).
"""
global wave_file # pylint: disable=global-statement
print("playing", name)
if wave_file:
wave_file.close()
try:
wave_file = open('sounds/' + name + '.wav', 'rb')
wave = audiocore.WaveFile(wave_file)
audio.play(wave, loop=loop)
except OSError:
pass # we'll just skip playing then
def power(sound, duration, reverse):
"""
Animate NeoPixels with accompanying sound effect for power on.
@param sound: sound name (similar format to play_wav() above)
@param duration: estimated duration of sound, in seconds (>0.0)
@param reverse: Reverses animation. If True, begins animation at end of strip.
"""
if reverse:
prev = NUM_PIXELS
else:
prev = 0
start_time = time.monotonic() # Save audio start time
play_wav(sound)
while True:
elapsed = time.monotonic() - start_time # Time spent playing sound
if elapsed > duration: # Past sound duration?
break # Stop animating
total_animation_time = elapsed / duration # Animation time, 0.0 to 1.0
if reverse:
total_animation_time = 1.0 - total_animation_time # 1.0 to 0.0 if reverse
threshold = int(NUM_PIXELS * total_animation_time + 0.5)
num = threshold - prev # Number of pixels to light on this pass
if num != 0:
if reverse:
strip[threshold:prev] = [ALT_COLOR] * -num
else:
strip[prev:threshold] = [ALT_COLOR] * num
strip.show()
prev = threshold
def mix(color_1, color_2, weight_2):
"""
Blend between two colors with a given ratio.
:param color_1: first color, as an (r,g,b) tuple
:param color_2: second color, as an (r,g,b) tuple
:param weight_2: Blend weight (ratio) of second color, 0.0 to 1.0
:return (r,g,b) tuple, blended color
"""
if weight_2 < 0.0:
weight_2 = 0.0
elif weight_2 > 1.0:
weight_2 = 1.0
weight_1 = 1.0 - weight_2
return (int(color_1[0] * weight_1 + color_2[0] * weight_2),
int(color_1[1] * weight_1 + color_2[1] * weight_2),
int(color_1[2] * weight_1 + color_2[2] * weight_2))
# List of swing wav files without the .wav in the name for use with play_wav()
swing_sounds = [
'swing1',
'swing2',
'swing3',
]
# List of hit wav files without the .wav in the name for use with play_wav()
hit_sounds = [
'hit1',
'hit2',
'hit3',
'hit4',
]
# List of yell wav files without the .wav in the name for use with play_wav()
yell_sounds = [
'yell1',
]
mode = 0 # Initial mode = OFF
# Setup idle pulse
idle_brightness = IDLE_PULSE_BRIGHTNESS_MIN # current brightness of idle pulse
idle_increment = 0.01 # Initial idle pulse direction
# Main loop
while True:
if mode == 0: # If currently off...
enable.value = True
power('on', POWER_ON_SOUND_DURATION, True) # Power up!
play_wav('idle', loop=True) # Play idle sound now
mode = 1 # Idle mode
time.sleep(1.0) #pause before moving on
# Setup for idle pulse
idle_brightness = IDLE_PULSE_BRIGHTNESS_MIN
idle_increment = 0.01
# lights the ring in COLOR_TOP color:
strip[0:NUM_RING] = [([int(c*idle_brightness) for c in COLOR_TOP])] * NUM_RING
# lights the strip in COLOR_IDLE color:
strip[NUM_RING:NUM_PIXELS] = [([int(c*idle_brightness) for c in COLOR_IDLE])] * NUM_STRIP
strip.show()
elif mode >= 1: # If not OFF mode...
x, y, z = accel.acceleration # Read accelerometer
accel_total = x * x + z * z #x axis used for hit and for swing
accel_yell = y * y + z * z #y axis used for yell
# Square root isn't needed, since we're
# comparing thresholds...use squared values instead.)
if accel_total > HIT_THRESHOLD: # Large acceleration on x axis = HIT
TRIGGER_TIME = time.monotonic() # Save initial time of hit
play_wav(random.choice(hit_sounds)) # Start playing 'hit' sound
COLOR_ACTIVE = COLOR_HIT # Set color to fade from
mode = 3 # HIT mode
elif mode == 1 and accel_total > SWING_THRESHOLD: # Mild acceleration on x axis = SWING
TRIGGER_TIME = time.monotonic() # Save initial time of swing
play_wav(random.choice(swing_sounds)) # Randomly choose from available swing sounds
# make a larson scanner
strip_backup = strip[0:-1]
for p in range(-1, len(strip)):
for i in range(p-1, p+2): # shoot a 'ray' of 3 pixels
if 0 <= i < len(strip):
strip[i] = COLOR_SWING
strip.show()
time.sleep(SWING_BLAST_SPEED)
if 0 <= (p-1) < len(strip):
strip[p-1] = strip_backup[p-1] # restore previous color at the tail
strip.show()
while audio.playing:
pass # wait till we're done
mode = 2 # we'll go back to idle mode
elif mode == 1 and accel_yell > YELL_THRESHOLD: # Motion on Y axis = YELL
TRIGGER_TIME = time.monotonic() # Save initial time of swing
# run a color down the staff, opposite of power-up
previous = 0
audio_start_time = time.monotonic() # Save audio start time
play_wav(random.choice(yell_sounds)) # Randomly choose from available yell sounds
sound_duration = YELL_SOUND_DURATION
while True:
time_elapsed = time.monotonic() - audio_start_time # Time spent playing sound
if time_elapsed > sound_duration: # Past sound duration?
break # Stop animating
animation_time = time_elapsed / sound_duration # Animation time, 0.0 to 1.0
pixel_threshold = int(NUM_PIXELS * animation_time + 0.5)
num_pixels = pixel_threshold - previous # Number of pixels to light on this pass
if num_pixels != 0:
# light pixels in YELL_COLOR:
strip[previous:pixel_threshold] = [YELL_COLOR] * num_pixels
strip.show()
previous = pixel_threshold
while audio.playing:
pass # wait till we're done
mode = 4 # we'll go back to idle mode
elif mode == 1:
# Idle pulse
idle_brightness += idle_increment # Pulse up
if idle_brightness > IDLE_PULSE_BRIGHTNESS_MAX or \
idle_brightness < IDLE_PULSE_BRIGHTNESS_MIN: # Then...
idle_increment *= -1 # Pulse direction flip
# light the ring:
strip[0:NUM_RING] = [([int(c*idle_brightness) for c in COLOR_TOP])] * NUM_RING
# light the strip:
strip[NUM_RING:NUM_PIXELS] = [([int(c*idle_brightness) for c in
COLOR_IDLE])] * NUM_STRIP
strip.show()
time.sleep(IDLE_PULSE_SPEED) # Idle pulse speed set above
elif mode > 1: # If in SWING or HIT or YELL mode...
if audio.playing: # And sound currently playing...
blend = time.monotonic() - TRIGGER_TIME # Time since triggered
if mode == 2: # If SWING,
blend = abs(0.5 - blend) * 3.0 # ramp up, down
strip.fill(mix(COLOR_ACTIVE, COLOR, blend)) # Fade from hit/swing to base color
strip.show()
else: # No sound now, but still SWING or HIT modes
play_wav('idle', loop=True) # Resume idle sound
mode = 1 # Return to idle mode
