Hardware Reference
In-Depth Information
### More thanks pandring who kind of kickstarted my work on the TSL2561 sen
sor
### A great big huge thanks to driverblock and the Adafruit team (Congrats
on your many succeses
### Ladyada). Without you folks I would just be a guy sitting somewhere
thinking about cool stuff
### Now I'm a guy building cool stuff.
### If any of this code proves useful, drop me a line at medicforlife.blog
spot.com
class Luxmeter:
i2c = None
def __init__(self, address=0x39, debug=0, pause=0.8):
self.i2c = Adafruit_I2C(address)
self.address = address
self.pause = pause
self.debug = debug
self.gain = 0 # no gain preselected
self.i2c.write8(0x80, 0x03) # enable the device
def setGain(self,gain=1):
""" Set the gain """
if (gain != self.gain):
if (gain==1):
self.i2c.write8(0x81, 0x02) # set gain = 1X and timing
= 402 mSec
if (self.debug):
print "Setting low gain"
else:
self.i2c.write8(0x81, 0x12) # set gain = 16X and timing
= 402 mSec
if (self.debug):
print "Setting high gain"
self.gain=gain; # safe gain for calculation
time.sleep(self.pause) # pause for integration
(self.pause must be bigger than integration time)
def readWord(self, reg):
"""Reads a word from the I2C device"""
try:
