sensor-reader.py

#!/usr/bin/python

# -*- coding: utf-8 -*-
"""
Sensor reader for BME280 Temp sensor and SDS011 PM sensor
"""

from SDS011.sds011 import SDS011, report_mode, work_state
from Adafruit_BME280 import *

# Sensor codes:
SENSOR_PM10        = 0
SENSOR_PM25        = 1
SENSOR_TEMPERATURE = 2
SENSOR_HUMIDITY    = 3
SENSOR_PRESSION    = 4

def main():
    try:
        sensor_tmp = BME280(
            t_mode=BME280_OSAMPLE_8,
            p_mode=BME280_OSAMPLE_8,
            h_mode=BME280_OSAMPLE_8,
            standby=BME280_STANDBY_250,
            filter=BME280_FILTER_off, address=0x77)
        degrees = sensor_tmp.read_temperature()
        pascals = sensor_tmp.read_pressure()
        humidity = sensor_tmp.read_humidity()

        print("log: {} {}".format(SENSOR_TEMPERATURE, degrees))
        print("log: {} {}".format(SENSOR_PRESSION, pascals))
        print("log: {} {}".format(SENSOR_HUMIDITY, humidity))
    except BaseException as e:
        print("err: {}".format(e.message))

    try:
        sensor_pm = SDS011("/dev/ttyS1")
        # sensor_pm = SDS011("/dev/ttyS1")
        sensor_pm.report_mode = report_mode["Passive"]
        time.sleep(5) # Investigate and test this sleep time
        pm10, pm25 = sensor_pm.request()
	time.sleep(5)
        if pm25 is not None and pm10 is not None:
            print("log: {} {}".format(SENSOR_PM10, pm10))
            print("log: {} {}".format(SENSOR_PM25, pm25))

        sensor_pm.work_state = work_state["Sleeping"]
    except BaseException as e:
        print("err: {}".format(e.message))


if __name__ == "__main__":
    main()