kopia lustrzana https://github.com/pimoroni/pimoroni-pico
55 wiersze
1.3 KiB
Python
55 wiersze
1.3 KiB
Python
import plasma
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from plasma import plasma_stick
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import time
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from breakout_bme280 import BreakoutBME280
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from pimoroni_i2c import PimoroniI2C
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"""
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Reads the temperature from a BME280 breakout...
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...and changes the LED strip an appropriate colour.
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https://shop.pimoroni.com/products/bme280-breakout
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"""
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# Set how many LEDs you have
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NUM_LEDS = 50
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BRIGHTNESS = 1.0
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# The range of readings that we want to map to colours
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MIN = 10
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MAX = 30
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# pick what bits of the colour wheel to use (from 0-360°)
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# https://www.cssscript.com/demo/hsv-hsl-color-wheel-picker-reinvented/
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HUE_START = 230 # blue
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HUE_END = 359 # red
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# WS2812 / NeoPixel™ LEDs
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led_strip = plasma.WS2812(NUM_LEDS, 0, 0, plasma_stick.DAT, color_order=plasma.COLOR_ORDER_RGB)
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# Start updating the LED strip
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led_strip.start()
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# set up I2C
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i2c = PimoroniI2C(plasma_stick.SDA, plasma_stick.SCL)
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# set up BME280 breakout
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bme = BreakoutBME280(i2c)
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while True:
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temperature, pressure, humidity = bme.read()
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print(f"""
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Temperature: {temperature:.2f} °C
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Humidity: {humidity:.2f} %
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Pressure: {pressure / 100:.2f} hPa
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""")
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# calculates a colour
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hue = HUE_START + ((temperature - MIN) * (HUE_END - HUE_START) / (MAX - MIN))
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# set the leds
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for i in range(NUM_LEDS):
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led_strip.set_hsv(i, hue / 360, 1.0, BRIGHTNESS)
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time.sleep(0.5)
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