seeed-python-sgp30 0.1.0

Python library for the Grove-VOC and eCO2 Gas Sensor(SGP30) is an air quality detection sensor.

Seeed SGP30

The SGP30 is a digital multi-pixel gas sensor designed for easy integration into air purifier, demand-controlled ventilation, and IoT applications. Sensirion’s CMOSens®technology offers a complete sensor system on a single chip featuring a digital I2C interface, a temperature controlled micro hotplate, and two preprocessed indoor air quality signals. As the first metal-oxide gas sensor featuring multiple sensing elements on one chip, the SGP30 provides more detailed information about the air quality.

This code is for

• Grove - VOC and eCO2 Gas Sensor (SGP30)

Dependencies

This driver depends on:

• grove.py

This is easy to install with the following command.

curl -sL https://github.com/Seeed-Studio/grove.py/raw/master/install.sh | sudo bash -s -

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install seeed-python-sgp30

To install system-wide (this may be required in some cases):

sudo pip3 install seeed-python-sgp30

Usage Notes

First, Check the corresponding i2c number of the board:

(.env) pi@raspberrypi:~ $ ls /dev/i2c*
/dev/i2c-1

Check if the i2c device works properly， 0x58 is the SGP30 i2c address.

pi@raspberrypi:~/Seeed_Python_SGP30 $ i2cdetect -y -r 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- 04 -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- 58 -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- -- 

Next, initialize the sersor object:

import seeed_sgp30
from grove.i2c import Bus
sgp30 = seeed_sgp30.grove_sgp30(Bus(1)) #The default on the raspberry pie is 1, so you can also use Bus()

Reading from the Sensor

To read from the sensor:

data = sgp30.read_measurements()
co2_eq_ppm, tvoc_ppb = data.data
print("\r  tVOC = {} ppb CO2eq = {} ppm  ".format(
                             tvoc_ppb, co2_eq_ppm))

Contributing

If you have any good suggestions or comments, you can send issues or PR us.