micropython-sgp40 0.1.0

MicroPython I2C driver for Sensirion SGP40 VOC sensor

Sensirion SGP40 VOC Sensor I2C driver for MicroPython

Sensirion SGP40 is a digital VOC (volatile organic compound) sensor. This is a I2C driver written in Python 3 for MicroPython.

Getting Started

Prerequisites

• Sensirion SGP40 Sensor Module
• MicroPython board with I2C interface

Wiring

Wire the I2C bus to the I2C bus on your MicroPython board. This is an example using the Pyboard D:

Pyboard	SGP40
X15 (3V3)	VDD
X14 (GND)	GND
X9	SCL
X10	SDA

Usage

This example reads the measurements in a continous loop:

import time
from machine import I2C, Pin
from sgp40 import SGP40

i2cbus = I2C(1)
sgp40 = SGP40(i2c, 0x59)

while True:
    sgp40.measure_raw()
    time.sleep(1)

This returns raw data from the sensor. The data is meant to be processed by the Sensirion specific VOC Algorithm, which returns air quality reflected by an index.

Built With

• MicroPython
• SGP40 Sensor Module

License

This project is licensed under the MIT License - see the LICENSE file for details