testDustHM3301.py

#!/usr/bin/env python3
# test HM3301 Laser Dust Sensor

# must run "sudo pigpiod" before starting
import sys
sys.path.append('./SDL_Pi_HM3301')

import subprocess
import SDL_Pi_HM3301
import time
import traceback
import pigpio
import config

import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)

GPIO.setup(config.DustSensorPowerPin, GPIO.OUT)
GPIO.output(config.DustSensorPowerPin, True)

#
if (config.SWDEBUG):
    print("Starting pigpio daemon")

# kill all pigpio instances
try:
    cmd = [ 'killall', 'pigpiod' ]
    output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
    print(output)
    time.sleep(5)
except:
    #print(traceback.format_exc())
    pass

cmd = [ '/usr/bin/pigpiod' ]
output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
print(output)
import DustSensor




time.sleep(0.01)
try:
    while 1:

        DustSensor.powerOnDustSensor()
        time.sleep(3)
        myData = DustSensor.get_data()
        print ("data=",myData)
        myAQI = DustSensor.get_aqi()
        DustSensor.print_data()
        print ("AQI=", myAQI)
        DustSensor.powerOffDustSensor()

        time.sleep(3)

except:
    #DustSensor.powerOffDustSensor()
    print(traceback.format_exc())