Once you've finished setting up your QT Py RP2040 with CircuitPython, you can access the code and necessary libraries by downloading the Project Bundle.
To do this, click on the Download Project Bundle button in the window below. It will download to your computer as a zipped folder.
# SPDX-FileCopyrightText: 2025 Liz Clark for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import time
import board
import displayio
import i2cdisplaybus
import neopixel
import digitalio
from adafruit_seesaw import seesaw, rotaryio, digitalio
from adafruit_bitmap_font import bitmap_font
from adafruit_display_text import label
import adafruit_displayio_ssd1306
import simpleio
from adafruit_ticks import ticks_ms, ticks_add, ticks_diff
from rainbowio import colorwheel
COLOR = (255, 150, 0) # yellow
OFF = (0, 0, 0)
PIXEL_PIN = board.A0
NUM_PIXELS = 6
timers = [6, 10, 15, 20, 25, 30] # minutes
color_time = 20 # milliseconds
# rotary encoder
i2c = board.STEMMA_I2C()
seesaw = seesaw.Seesaw(i2c, addr=0x36)
encoder = rotaryio.IncrementalEncoder(seesaw)
pos = -encoder.position
last_pos = pos
seesaw.pin_mode(24, seesaw.INPUT_PULLUP)
button = digitalio.DigitalIO(seesaw, 24)
button_state = False
pixels = neopixel.NeoPixel(PIXEL_PIN, NUM_PIXELS, brightness=0.2, auto_write=False)
pixels.fill(OFF)
pixels.show()
# display setup
displayio.release_displays()
# oled
oled_reset = board.D9
display_bus = i2cdisplaybus.I2CDisplayBus(i2c, device_address=0x3D, reset=oled_reset)
WIDTH = 128
HEIGHT = 64
display = adafruit_displayio_ssd1306.SSD1306(display_bus, width=WIDTH, height=HEIGHT)
font = bitmap_font.load_font("/Arial-14.bdf")
main_area = label.Label(font, text="6 Minutes", color=0xFFFFFF)
main_area.anchor_point = (0.5, 0.0)
main_area.anchored_position = (display.width / 2, display.height / 2)
splash = displayio.Group()
splash.append(main_area)
display.root_group = splash
timer_index = 0
timer = timers[timer_index]
time_remaining = timer * 60000
active_timer = False
timer_clock = ticks_ms()
color_clock = ticks_ms()
color_value = 0
last_map = 0
mapped_time = 0
while True:
if not active_timer:
pos = encoder.position
if pos != last_pos:
if pos > last_pos:
timer_index = (timer_index + 1) % 6
else:
timer_index = (timer_index - 1) % 6
print(timer_index)
main_area.text = f"{timers[timer_index]} Minutes"
last_pos = pos
if not button.value and not button_state:
main_area.text = "START!"
timer = timers[timer_index]
time_remaining = timer * 60000
last_map = 0
timer_clock = ticks_ms()
color_clock = ticks_ms()
active_timer = True
button_state = True
if button.value and button_state:
button_state = False
if active_timer:
if ticks_diff(ticks_ms(), timer_clock) >= 1000:
time_remaining -= 1000
remaining = int(time_remaining / 1000)
secs_remaining = remaining % 60
remaining //= 60
mins_remaining = remaining % 60
if time_remaining > 0:
mapped_time = simpleio.map_range(
time_remaining, 0, (timer * 60000), 0, NUM_PIXELS + 1
)
mapped_time = max(mapped_time, 1)
if int(mapped_time) != last_map:
pixels.fill(OFF)
last_map = int(mapped_time)
main_area.text = f"{mins_remaining}:{secs_remaining:02}"
else:
pixels.fill(COLOR)
pixels.show()
time.sleep(0.5)
pixels.fill(OFF)
pixels.show()
main_area.text = "DONE!"
print(time_remaining)
timer_clock = ticks_add(timer_clock, 1000)
if ticks_diff(ticks_ms(), color_clock) >= color_time:
color_value = (color_value + 1) % 255
for i in range(int(mapped_time)):
pixels[i] = colorwheel(color_value)
if time_remaining > 0:
pixels.show()
color_clock = ticks_add(color_clock, color_time)
if not button.value and not button_state:
timer = timers[timer_index]
pixels.fill(OFF)
pixels.show()
main_area.text = "STOPPED"
active_timer = False
button_state = True
if button.value and button_state:
button_state = False
Upload the Code, Assets and Libraries to the QT Py
After downloading the Project Bundle, plug your QT Py into the computer's USB port with a known good USB data+power cable. You should see a new flash drive appear in the computer's File Explorer or Finder (depending on your operating system) called CIRCUITPY. Unzip the folder and copy the following items to the QT Py's CIRCUITPY drive.
- lib folder
- code.py
- Arial-14.bdf
Your QT Py CIRCUITPY drive should look like this after copying the lib folder, font file and the code.py file.
Page last edited February 04, 2025
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