piqmp6988 1.0.1

To use QMP6988 with pigpio.

# 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)

# -*- 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