binh-bk/Sensirion_SPS30

Python script to read multiple fine particles (PM1 to PM10) from Sensirion SPS30. The script can work with multiple devices connected to USB hub

PythonMIT

Sensirion_SPS30

Python script to read multiple fine particles (PM1 to PM10) from Sensirion SPS30. The script can work with multiple devices connected to USB hub

Set up

Communication via UART with a SLAB CP2102 adapter
For the pin, refer the SPS30 datasheet stored here or on SparkFun
Connect pin TX (on USB adapter) to RX pin (on SPS30)

Run

if you have all SPS30 connected to USB hub, then you can run all devices by

    usbs = get_usb()
    print(usbs)
    process = list()
    for port in usbs:
        p = SPS30(port=port, push_mqtt=True)
        process.append(p)
    print('Starting')
    while True:
        for p in process:
            p.run_query()

if you want to specify then manually goes through each port and make an instance for each device like this:

  s1 = SPS30(port='/dev/ttyUSB0')
  s2 = SPS30(port='/dev/ttyUSB3')
  while True:
      for p in [s1,s2]:
          p.run_query()

data is logged into CSV file by default, to only read the CSV on terminal then set save_data=False like this:

  s1 = SPS30(port='/dev/ttyUSB0', save_data=False)

in addition, if you want to push data to MQTT server, than config the details:

# MQTT host, users
mqtt = '192.168.1.100'  # change this
topic = 'sensor/sps30' # and this
auth = {'username': 'mqtt_user', 'password': 'mqtt_password'} # and these two

and specify the this option:

p = SPS30(port=port, push_mqtt=False)

Data analysis

analyze data by each sensor using different moving average (to smooth out the data)

- or plot PM1 to PM10

- or to compare several sensors at one (in which this script is very useful)

- or to simpify by only the mean and standard deviation from multiple sensors

Credit

The core of Python Inteface with SPS30 was forked from feyzikesim