gaveshalabs/ags10_sensor

Micropython library for the AGS10 Volatile Organic Compounds sensor

AGS10 sensor

Micropython library for the AGS10 TVOC sensor

I2C

Pin layout

Pin	Name	Description
1	SCL	Serial clock
2	SDA	Serial data
3	GND	Ground
4	VCC	Power supply

Warning!

• 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

Example

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)

Support

You can always improve the quality of the libraries by providing issues and Pull Requests.

ags10_sensor's Issues

Re: AGS10 i2c how to read

Hi, I was hoping that you could explain how the i2c addresses are read from the AGS10 please.

I'm looking at the datasheet - how do I read the VOC data?

Do I just read 5 bytes from 0x00 and the voc is bytes 2, 3, and 4 in ppb?