def init():
try:
ser = serial.Serial(port='/dev/ttyUSB0', baudrate=9600, timeout=1)
usb = usbiss.USBISS('/dev/ttyACM0', 'spi', spi_mode=2, freq=500000)
alphasense = opc.OPCN2(usb)
alphasense.on()
time.sleep(10.0)
return True
except:
return False
def init_opc ():
print ("initializing OPC reader...")
try:
spi = usbiss.USBISS("/dev/opc", 'spi', spi_mode = 2, freq = 500000)
sleep(2)
opc_reader = opc.OPCN2(spi)
sleep (2)
opc_reader.on ()
sleep (2)
print ("success.")
return opc_reader
except:
print ("Failed to init OPC")
return None
time.sleep(5.0)
# In connection case get the values of particle sensor and sending by Xbee transceiver
# in the opposite case print negative case
if (a):
with silence():
# Create the saving file if the hardware is ready
#Create the saving values and create news each the time change
t0 = datetime.datetime.now()
Name = "OPCN2_" + str(t0.year) + "_" + str(t0.month) + "_" + str(
t0.day) + "_" + str(t0.hour) + "_" + str(t0.minute) + "_" + str(
t0.second) + ".txt"
FileSave = open(Name, 'w')
# Again configure the hardware (global object)
ser = serial.Serial(port='/dev/ttyUSB0', baudrate=9600, timeout=1)
usb = usbiss.USBISS('/dev/ttyACM0', 'spi', spi_mode=2, freq=500000)
alphasense = opc.OPCN2(usb)
alphasense.on()
time.sleep(10.0)
while True:
# Contruct the data to send. Use the frame construction and
# send using Xbee
Hist = alphasense.histogram()
Hist['Time'] = str(datetime.datetime.now())
d0 = str(Hist['PM1']) + " "
d1 = str(Hist['PM2.5']) + " "
d2 = str(Hist['PM10']) + " "
d3 = str(Hist['Time'])
D = d0 + d1 + d2 + d3
Dat0 = range(0, len(D))
for k in range(0, len(D)):
import usbiss
import opc
# Get arguments
if len(sys.argv) != 2:
print('Usage: {} dev-path'.format(sys.argv[0]))
sys.exit(1)
# Port
port = sys.argv[1]
# Sample period
period = 10
# Open connection to USB-ISS in SPI mode.
usb = usbiss.USBISS(port, 'spi', spi_mode=2, freq=500000)
# Give the USB connection to py-opc
alpha = opc.OPCN2(usb)
# Toggle to tur on properly
alpha.off()
sleep(1)
alpha.on()
sleep(1)
# log data
lastUpdated = 0
# data
#Importing necessary packages
import usbiss
import opc
import argparse
import sys
import os
import time
import csv
import datetime
import serial
#Initiating the OPCN2
try:
time.sleep(5)
#Open an SPI connection
spi = usbiss.USBISS("/dev/ttyACM0", 'spi', spi_mode = 2, freq = 500000)
time.sleep(5)
alpha = opc.OPCN2(spi)
except Exception as e:
print ("Startup Error: {}".format(e))
sys.exit(1)
#Turn on the OPC
alpha.on()
#Wait for ten seconds to allow the sensor to boot up
time.sleep(10)
#change firmware to correct version
alpha.firmware = {'major': 18, 'version': 18.2, 'minor': 2}
import spidev
import usbiss
import opc
import sys
from time import sleep
#spi = spidev.SpiDev()
#spi.open(0, 0)
#spi.mode = 1
#spi.max_speed_hz = 500000
spi = usbiss.USBISS("/dev/opc", 'spi', spi_mode=2, freq=500000)
sleep(2.0)
try:
alphasense = opc.OPCN2(spi)
except:
print("Failed to init OPC N2")
sys.exit(1)
# Turn the opc ON
alphasense.on()
sleep(2.0)
# Read the information string
print(alphasense.read_info_string())
for k in range(5):
# Read the histogram
sleep(2.0)