wip co2 sensor based on a bunch of adafruit stemma qt compatible boards

code.py

import time
import sys
import board
import neopixel
import busio
import digitalio
import displayio
import terminalio
from adafruit_display_text import label
from adafruit_displayio_sh1107 import SH1107, DISPLAY_OFFSET_ADAFRUIT_FEATHERWING_OLED_4650
from adafruit_bme280 import basic as adafruit_bme280
import adafruit_scd4x

DELAY = 5            # Must be >= 5
GOODCO2 = 400
BADCO2 = 1100
RGCOLORBLIND = False

displayio.release_displays()
i2c = board.I2C()

def debug(msg):
    print(msg,end='')

try:
    display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)
    display = SH1107(display_bus, width=128, height=64)
    debug("Found display\n")
except:
    display = None

pixels = neopixel.NeoPixel(board.NEOPIXEL, 1)
#i2c = busio.I2C(board.SCL, board.SDA, frequency=100000)
temp = True
pres = True
try:
    bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c)
    debug("Found temperature sensor\n")
except:
    temp = False
try:
    scd40 = adafruit_scd4x.SCD4X(i2c)
    debug("Found CO2 sensor\n")
#    debug("Serial number: %s" % repr([hex(i) for i in scd40.serial_number])))
    scd40.start_periodic_measurement()
    debug("Requesting intial CO2 measurement\n")
except:
    pres = False

button = digitalio.DigitalInOut(board.BUTTON)
button.switch_to_input(pull=digitalio.Pull.UP)

def reportstuff():
    fillcolor = (0, 0, 255)
    scale = 0
    if temp:
        temperature = (bme280.temperature * 1.8 + 32)
        relative_humidity = bme280.relative_humidity
        pressure = bme280.pressure
        altitude = bme280.altitude
        co2 = 0
    if pres:
        if scd40.data_ready:
            co2 = scd40.CO2
            #scale 600-1600 to 0-127
            scale = min(max((co2 - GOODCO2) / (BADCO2 - GOODCO2) * 255, 0), 255)
            if RGCOLORBLIND:
                fillcolor = (scale, 0, 255 - scale)
            else:
                fillcolor = (scale, 255 - scale, 0)
            if not temp:
                temperature = (scd40.temperature * 1.8 + 32)
                relative_humidity = scd40.relative_humidity
    pixels.fill(fillcolor)
    debug("\n\nRefresh: %ds\n" % DELAY)
    debug("%0.1fF | %0.1f%%\n" % (temperature, relative_humidity))
    debug("%dhPa | %0.2fm\n" % (pressure, altitude))
    debug("CO2: %dppm" % co2)

unlocked = True

# Todo for later when the button will do something
mode = True

while True:
    if not button.value:
        mode = not mode
    if unlocked and int(time.time()) % DELAY == 0:
        reportstuff()
        unlocked = False
        time.sleep(0.1)
    if (int(time.time()) % DELAY == 2):
        unlocked = True