kopia lustrzana https://github.com/pimoroni/pimoroni-pico
135 wiersze
3.9 KiB
Python
135 wiersze
3.9 KiB
Python
import time
|
|
from stellar import StellarUnicorn
|
|
from picographics import PicoGraphics, DISPLAY_STELLAR_UNICORN
|
|
from pimoroni_i2c import PimoroniI2C
|
|
from pimoroni import BREAKOUT_GARDEN_I2C_PINS
|
|
from breakout_bme280 import BreakoutBME280
|
|
|
|
"""
|
|
Reads the temperature from a BME280
|
|
... and displays an appropriately coloured pulsing blob.
|
|
|
|
Buttons:
|
|
A - Show temperature
|
|
B - Show humidity
|
|
C - Show pressure
|
|
"""
|
|
|
|
# The range of readings that we want to map to colours
|
|
MIN = 10
|
|
MAX = 30
|
|
|
|
# pick what bits of the colour wheel to use (from 0-360°)
|
|
# https://www.cssscript.com/demo/hsv-hsl-color-wheel-picker-reinvented/
|
|
HUE_START = 230 # blue
|
|
HUE_END = 359 # red
|
|
|
|
# rainbow party mode
|
|
rainbow_orb = False
|
|
|
|
# set up the Unicron
|
|
su = StellarUnicorn()
|
|
graphics = PicoGraphics(DISPLAY_STELLAR_UNICORN)
|
|
|
|
# set up the sensor
|
|
i2c = PimoroniI2C(**BREAKOUT_GARDEN_I2C_PINS)
|
|
bme = BreakoutBME280(i2c)
|
|
|
|
# set up constants and variables for drawing
|
|
WIDTH, HEIGHT = graphics.get_bounds()
|
|
|
|
BLACK = graphics.create_pen(0, 0, 0)
|
|
WHITE = graphics.create_pen(255, 255, 255)
|
|
|
|
forward = True
|
|
orb_brightness = 0.5
|
|
hue = 0.0
|
|
mode = "temperature"
|
|
|
|
graphics.set_font("bitmap8")
|
|
|
|
while True:
|
|
|
|
if su.is_pressed(StellarUnicorn.SWITCH_A):
|
|
mode = "temperature"
|
|
print(f"mode = {mode}")
|
|
|
|
elif su.is_pressed(StellarUnicorn.SWITCH_B):
|
|
mode = "humidity"
|
|
print(f"mode = {mode}")
|
|
|
|
elif su.is_pressed(StellarUnicorn.SWITCH_C):
|
|
mode = "pressure"
|
|
print(f"mode = {mode}")
|
|
|
|
# read the onboard sensor
|
|
# the following two lines do some maths to convert the number from the temp sensor into celsius
|
|
temperature, pressure, humidity = bme.read()
|
|
|
|
print(f"""
|
|
Temperature: {temperature:.2f} °C
|
|
Humidity: {humidity:.2f} %
|
|
Pressure: {pressure/100:.2f} hPa
|
|
""")
|
|
|
|
# fills the screen with black
|
|
graphics.set_pen(BLACK)
|
|
graphics.clear()
|
|
|
|
# draw a weird orb:
|
|
# three overlapping circles with varying saturations
|
|
if rainbow_orb is True:
|
|
graphics.set_pen(graphics.create_pen_hsv((hue / 360), 0.5, orb_brightness))
|
|
graphics.circle(8, 8, 7)
|
|
graphics.set_pen(graphics.create_pen_hsv((hue / 360), 0.7, orb_brightness))
|
|
graphics.circle(7, 7, 7)
|
|
graphics.set_pen(graphics.create_pen_hsv((hue / 360), 1.0, orb_brightness))
|
|
graphics.circle(7, 7, 5)
|
|
hue += 0.01 * 360
|
|
else:
|
|
# calculate a colour from the temperature
|
|
hue = max(0, HUE_START + ((temperature - MIN) * (HUE_END - HUE_START) / (MAX - MIN)))
|
|
graphics.set_pen(graphics.create_pen_hsv((hue / 360), 0.6, orb_brightness))
|
|
graphics.circle(8, 8, 7)
|
|
graphics.set_pen(graphics.create_pen_hsv((hue / 360), 0.8, orb_brightness))
|
|
graphics.circle(7, 7, 7)
|
|
graphics.set_pen(graphics.create_pen_hsv((hue / 360), 1.0, orb_brightness))
|
|
graphics.circle(7, 7, 5)
|
|
|
|
# pulse the orb!
|
|
if forward is True:
|
|
orb_brightness += 0.01
|
|
if orb_brightness >= 0.7:
|
|
orb_brightness = 0.7
|
|
forward = False
|
|
|
|
if forward is False:
|
|
orb_brightness -= 0.01
|
|
if orb_brightness <= 0.3:
|
|
orb_brightness = 0.3
|
|
forward = True
|
|
|
|
# select a pen colour for the text
|
|
# try BLACK for a funky negative space effect
|
|
graphics.set_pen(WHITE)
|
|
|
|
if mode == "temperature":
|
|
graphics.text(f"{temperature:.0f}°", 2, 5, scale=1)
|
|
# or uncomment these lines if you'd prefer it in Freedom Units
|
|
# fahrenheit = (temperature * 9 / 5) + 32
|
|
# graphics.text(f"{fahrenheit:.0f}°", 2, 5, scale=1)
|
|
|
|
if mode == "humidity":
|
|
graphics.text(f"{humidity:.0f}%", 1, 5, scale=1)
|
|
|
|
if mode == "pressure":
|
|
if pressure / 100 < 1000:
|
|
graphics.text(f"{pressure / 100:.0f} hPa", 1, 0, WIDTH, scale=1)
|
|
else:
|
|
pressure_string = str(pressure / 100)
|
|
graphics.text(f"{pressure_string[0]}.{pressure_string[1]}k hPa", 0, 0, WIDTH, scale=1)
|
|
|
|
# time to update the display
|
|
su.update(graphics)
|
|
time.sleep(0.1)
|