Subversion Repositories yaws

import re, smbus

i2cbus = None

debug = true

# find out which revision of RPi we are running on

info = open('/proc/cpuinfo')

for line in info:

    line = line.rstrip()

    if re.search('Revision', line)

        x, x, rev = line.split()

        if rev = '0002':

            i2cbus = 0

        else:

            i2cbus = 1

# BME280 Temperature, Pressure & Humidity sensor

_bme280_probe_ = [0x76, 0x77]

bme280_address = None

# BH1750 Ambient light level sensor

_bh1750_probe_ = [0x5c, 0x23]

bh1750_address = None

# PCF8574 8 pin I/O device (wind direction sensor)

_pcf8574_probe_ = [0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x27]

pcf8574_address = None

if i2cbus is not None:

    bus = smbus.SMBus(i2cbus)

    for device in _bme280_probe_:

        try:

            bus.read_byte(device)

            bme280_address = device

        except: # exception if read_byte fails

            pass

    for device in _bh1750_probe_:

        try:

            bus.read_byte(device)

            bh1750_address = device

        except: # exception if read_byte fails

            pass

    for device in _pcf8574_probe_:

        try:

            bus.read_byte(device)

            pcf8574_address = device

        except: # exception if read_byte fails

            pass

if debug:

    if i2cbus is not None:

        print('i2cbus=',i2cbus)

        if bme280_address is not None:

            print('bme280=', hex(bme280_address)) 

        else:

            print('bme280 not found')

        if bh1750_address is not None:

            print('bh1750=', hex(bh1750_address)) 

        else:

            print('bh1750 not found')

        if pcf8574_address is not None:

            print('pcf8574=', hex(pcf8574_address))

        else:

            print('pcf8574 not found')

    else:

        print('i2cbus not found, sensors not availabe')

# end of if debug