mh-zxx

Lightweight python library for interactions with MH-Z16, MH-Z19 and similar Intelligent Infrared Gas Module CO2

MH-ZXX CO2 Sensor API

• CO2Sensor
  • __init__
  • read_co2
  • read_temperature
  • read_status
  • read
  • zero_calibration
  • span_calibration
  • set_auto_calibration
  • close

CO2Sensor

class CO2Sensor()

MH-Z16 and MH-Z19 CO2 sensor.

__init__

def __init__(port: str, baudrate: int = 9600, timeout: float = 0.2)

Setup CO2 sensor

Arguments:

• port: The serial port name, for example /dev/ttyUSB0 (Linux), /dev/tty.usbserial (OS X) or COM4 (Windows).
• baudrate: Baudrate to use.
• timeout: Read timeout after each command.

read_co2

def read_co2() -> int

Read CO2 concentration.

read_temperature

def read_temperature() -> float

Read temperature.

read_status

def read_status() -> int

Read status.

read

def read() -> Tuple[int, float, int, int]

Read all values.

Returns:

CO2 concentration, temperature, status, co2 auto calibration point

zero_calibration

def zero_calibration()

Zero calibration.

span_calibration

def span_calibration(span: int)

Span calibration.

set_auto_calibration

def set_auto_calibration(state: bool)

Set auto calibration point.

close

def close()

Close serial port.