PyPortal conference badge for #PyCon2019

code.py

"""
This example will set up a simple conference badge with two different screens and a QR code.
"""
import time
import board
from adafruit_pyportal import PyPortal
import adafruit_touchscreen


# the current working directory (where this file is)
cwd = ("/"+__file__).rsplit('/', 1)[0]
# Initialize the pyportal object and let us know what data to fetch and where
# to display it

images = [('/pinecrest_badge.bmp', b'http://bit.ly/2vEzT8e'), 
          ('/tp_chalkboard.bmp', b'http://bit.ly/2VBx8mL')]

pyportal = PyPortal(
                    status_neopixel=board.NEOPIXEL,
                    default_bg=cwd+"/pinecrest_badge.bmp",
                    text_font=cwd+"/fonts/Collegiate-50.bdf",
                    text_position=(175, 185),
                    text_color=0xFFFFFF,
                    caption_font=cwd+"/fonts/Collegiate-24.bdf",
                    caption_position=(30, 220),
                    caption_color=0xFFFFFF,)

ts = adafruit_touchscreen.Touchscreen(board.TOUCH_XL, board.TOUCH_XR,
                                      board.TOUCH_YD, board.TOUCH_YU,
                                      calibration=((5200, 59000), (5800, 57000)),
                                      size=(320, 240))

current_image = 0
backlight = True
backlight_timeout_seconds = 120
backlight_timeout = True
light_on_time = time.monotonic()

def qr_popup(url, duration=30, touch_escape=True):
    pyportal.show_QR(url, qr_size=8, x=54, y=20)
    start_time = time.monotonic()
    while True:
        touched = ts.touch_point if touch_escape else False
        if time.monotonic() - start_time > duration or touched:
            print('returning')
            pyportal._qr_group.pop()
            board.DISPLAY.show(pyportal.splash)
            return
        

while True:
    p = ts.touch_point
    if p:
        print('{} was pressed'.format(p))
        light_on_time = time.monotonic()
        if not backlight:
            backlight = 1.0
            pyportal.set_backlight(1.0)
        elif p[0] > 260 and p[1] < 64:
            backlight_timeout = not backlight_timeout
            print('toggling backlight timout')
            if not backlight_timeout:
                pyportal.neo_status((0,255,255))
            else:
                pyportal.neo_status((0,0,0))
            time.sleep(0.5) #prevent bounce
        elif p[1] < 240//3 * 2:
            current_image += 1
            if current_image == len(images):
                current_image = 0
            pyportal.set_background(cwd+images[current_image][0]) 
        else:
            qr_popup(images[current_image][1])
            
    if backlight_timeout and backlight and (time.monotonic() - light_on_time) > backlight_timeout_seconds:
        backlight = False
        pyportal.set_backlight(0)

    time.sleep(0.05)