code.py

# This version uses AdafruitIO with the BlueFruit app on your phone.
import time
import board
import busio
import adafruit_sgp30
from adafruit_ble import BLERadio
from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
from adafruit_ble.services.nordic import UARTService

i2c = busio.I2C(board.SCL, board.SDA, frequency=100000)
sgp30 = adafruit_sgp30.Adafruit_SGP30(i2c)

ble = BLERadio()
uart = UARTService()
advertisement = ProvideServicesAdvertisement(uart)
print("SGP30 serial #", [hex(i) for i in sgp30.serial])

sgp30.iaq_init()
sgp30.set_iaq_baseline(0x8973, 0x8AAE)

while True:
    ble.start_advertising(advertisement)
    while not ble.connected:
        pass
    while ble.connected:
        time.sleep(5)
        uart.write("eCO2 = %d ppm \t" % (sgp30.eCO2))
        uart.write("TVOC = %d ppb" % (sgp30.TVOC))
    ("**** Baseline values: eCO2 = 0x%x, TVOC = 0x%x" % (sgp30.baseline_eCO2, sgp30.baseline_TVOC))