Micropython library for the AGS10 TVOC sensor
| Pin | Name | Description |
|---|---|---|
| 1 | SCL | Serial clock |
| 2 | SDA | Serial data |
| 3 | GND | Ground |
| 4 | VCC | Power supply |
The sensor uses I2C at low speed. It should be LESS than 15kHz.
The datasheet advices against frequent measurements. Specially whne TVOC measurements cannot be performed frequently. Doing so will deteriorate the sensor quickly.
There should be at least 1.5s delay between two successive measurements
from ags10 import AGS10
from machine import I2C
from time import sleep_ms
# Init
sensor = AGS10(I2C(0, freq=10000))
# Enable to perform CRC check for measurements
sensor.check_crc = True
# Measure TVOC in parts per billion
tvoc = sensor.total_volatile_organic_compounds_ppb
# wait before the next command to the sensor
sleep_ms(2000)
# Measure resistance in kohms
resistance = sensor.resistance_kohm
# Re-calibrate zero point.
# Set the resistance in kohms in virtual memory.
# Needs at least 15 min exposure in fresh air before calibration.
sensor.zero_point_calibrate(resistance)
sleep_ms(30)
# Reset zero point to factory defaults
sensor.zero_point_factory_reset()
sleep_ms(30)
# Update I2C address
sensor.update_address(126)You can always improve the quality of the libraries by providing issues and Pull Requests.