Python library for operating the Alphasense OPC-N2 Optical Particle Counter using a Raspberry Pi (or other linux device). Full documentation can be found here.

1. py-spidev

For use on the Raspberry Pi (or any other linux device?), there are two methods for easy installation:

Install the py-opc package through PyPi:

>>> pip install py-opc

Upgrade to the newest version:

>>> pip install py-opc --upgrade

This library is licensed under the MIT license.

Full documentation can be found here.

import spidev
import opc
from time import sleep

spi = spidev.SpiDev()
spi.open(0, 0)
spi.mode = 1
spi.max_speed_hz = 500000

alphasense = opc.OPCN2(spi)

# Turn the opc ON
alphasense.on()

# Read the information string
print (alphasense.read_info_string())

# Read the histogram
print (alphasense.histogram())

# Turn the opc OFF
alphasense.off()