98 lines
2.6 KiB
Python
98 lines
2.6 KiB
Python
import time
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import adafruit_CCS811
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import board
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import busio
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import neopixel
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# i2c interface for the gas sensor
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i2c_bus = busio.I2C(board.SCL, board.SDA)
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ccs = adafruit_CCS811.CCS811(i2c_bus)
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# Three Different NeoPixel 8 LED Lengths for Output:
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# 1 - Temperature - Circuit Playground Built-In LEDs
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# 2 - Total Volatile Organic Compounds [strip]
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# 3 - Co2 Output - NeoPixel [strip]
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num_leds = 8
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temperature_pix = neopixel.NeoPixel(board.NEOPIXEL, num_leds, brightness=.1)
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tvoc_pix = neopixel.NeoPixel(board.A1, num_leds, bpp=4, brightness=.1)
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co2_pix = neopixel.NeoPixel(board.A2, num_leds, bpp=4, brightness=.1)
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led_draw = .05 # delay for LED pixel turn on/off
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# wait for the sensor to be ready and calibrate the thermistor
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while not ccs.data_ready:
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pass
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temp = ccs.temperature
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ccs.temp_offset = temp - 25.0
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def clear_pix(delay):
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# clear all LEDs for breathing effect
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for i in range(0, num_leds):
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temperature_pix[i] = (0, 0, 0)
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co2_pix[i] = (0, 0, 0, 0)
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tvoc_pix[i] = (0, 0, 0, 0)
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time.sleep(delay)
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def co2_led_meter():
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# Show Carbon Dioxide on a NeoPixel Strip
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co2_floor = 400
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co2_ceiling = 8192
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# Map CO2 range to 8 LED NeoPixel Stick
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co2_range = co2_ceiling - co2_floor
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co2_led_steps = co2_range / num_leds
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co2_leds = int((ccs.eCO2 - co2_floor) / co2_led_steps)
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# Insert Colors
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for i in range(0, (co2_leds - 1)):
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co2_pix[i] = (255, 0, 255, 0)
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time.sleep(led_draw)
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def tvoc_led_meter():
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# Show Total Volatile Organic Compounds on a NeoPixel Strip
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tvoc_floor = 0
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tvoc_ceiling = 1187
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# Map CO2 range to 8 LED NeoPixel Stick
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tvoc_range = tvoc_ceiling - tvoc_floor
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tvoc_led_steps = tvoc_range / num_leds
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tvoc_leds = int(ccs.TVOC / tvoc_led_steps)
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# Insert Colors
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for i in range(0, (tvoc_leds - 1)):
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tvoc_pix[i] = (0, 0, 255, 0)
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time.sleep(led_draw)
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def temp_led_meter():
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# Show Temperature on Circuit Playground built-in NeoPixels
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temp_floor = 23
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temp_ceiling = 36
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# Map temperature range to 8 LEDs on Circuit Playground
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temp_range = temp_ceiling - temp_floor
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temp_led_steps = temp_range / num_leds
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temp_leds = int((ccs.temperature - temp_floor) / temp_led_steps)
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# Insert Colors
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for i in range(0, (temp_leds - 1)):
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temperature_pix[i] = (255, 255, 0)
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time.sleep(led_draw)
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while True:
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# print to console
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# - co2
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# - total voltatile organic compounds
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# - temperature in celsius
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print("CO2: ", ccs.eCO2, " TVOC:", ccs.TVOC, " temp:", ccs.temperature)
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co2_led_meter()
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tvoc_led_meter()
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temp_led_meter()
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time.sleep(.5)
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clear_pix(led_draw)
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