Installing

Stable library from PyPi:

• Just run pip install piqmp6988

PiQmp6988's Methods

Constructor(config={})

'config' is dictionary type.

'address'

Configure I2C address of QMP6988.

• Address.LOW.value
  • I2C address is 0x70
  • Default
• Address.HIGH.value
  • I2C address is 0x56

'filter'

Configure Infinite Impulse Response(IIR) Filter coefficient of QMP6988.

• Filter.COEFFECT_OFF.value
  • Do not use IIR Filter
  • Default
• Filter.COEFFECT_2.value
  • IIR filter coefficient is 2
• Filter.COEFFECT_4.value
  • IIR filter coefficient is 4
• Filter.COEFFECT_8.value
  • IIR filter coefficient is 8
• Filter.COEFFECT_16.value
  • IIR filter coefficient is 16
• Filter.COEFFECT_32.value
  • IIR filter coefficient is 32

'mode'

Configure Power Mode of QMP6988.

• Powermode.SLEEP.value
  • Power Mode is SLEEP
  • Default
• Powermode.FORCE.value
  • Power Mode is Force
• Powermode.NORMAL.value
  • Power Mode is Normal

'pressure'

Configure average times for pressure measurement of QMP6988.

• Oversampling.SKIP.value
  • Do not measure pressure
  • Default
• Oversampling.X1.value
  • Single Shot value
• Oversampling.X2.value
  • Average 2 times for mesurment value
• Oversampling.X4.value
  • Average 4 times for mesurment value
• Oversampling.X8.value
  • Average 8 times for mesurment value
• Oversampling.X16.value
  • Average 16 times for mesurment value
• Oversampling.X32.value
  • Average 32 times for mesurment value
• Oversampling.X64.value
  • Average 64 times for mesurment value

'temperature'

Configure average times for temperature measurement of QMP6988.

• Oversampling.SKIP.value
  • Do not measure temperature
  • Use 25.0 celsius value when 'pressure' measure
  • Default
• Oversampling.X1.value
  • Single Shot value
• Oversampling.X2.value
  • Average 2 times for mesurment value
• Oversampling.X4.value
  • Average 4 times for mesurment value
• Oversampling.X8.value
  • Average 8 times for mesurment value
• Oversampling.X16.value
  • Average 16 times for mesurment value
• Oversampling.X32.value
  • Average 32 times for mesurment value
• Oversampling.X64.value
  • Average 64 times for mesurment value

read()

Read temperature and pressure. Return value is dictionary type.

'temperature'

• OK
  • Type: float
  • Celsius temperature value [℃]
• NG
  • Type: False

'pressure'

• OK
  • Type: float
  • Atmospheric pressure value [hPa]
• NG
  • Type: False

Sample

Run sudo pigpiod before running the sample.

Indoor navigation (from QMP6988 Datasheet)

.. code-block:: shell

# -*- coding: utf-8 -*-
import piqmp6988 as QMP6988
import time

config = {
    'temperature' : QMP6988.Oversampling.X4.value,
    'pressure' :    QMP6988.Oversampling.X32.value,
    'filter' :      QMP6988.Filter.COEFFECT_32.value,
    'mode' :        QMP6988.Powermode.NORMAL.value
}

obj = QMP6988.PiQmp6988(config)

try:
    while True:
        value = obj.read()
        if (isinstance(value['temperature'], float)):
            print("%8.2f" % round(valueb['temperature'], 2))
        if (isinstance(valueb['pressure'], float)):
            print("%8.2f" % round(valueb['pressure'], 2))
        time.sleep(10)
except KeyboardInterrupt:
    pass