gotemp

This is a Python module to interact with GoTemp! temperature sensors. The module provides capabilities to obtain a single reading from the device, and to manipulate the color and brightness of its built-in LED.

Installation

The gentle reader will want to have been installing from pypi:

pip install gotemp

Usage

The Device class can be used easily in the context of a with statement, or as an independent instance. The following two examples, then, which poll for the temperature and run a brief LED test, are equivalent:

import gotemp

with gotemp.Device('/dev/ldusb0') as sensor:
    deg_c, deg_f = sensor.get_reading()
    sensor.test_leds()

print '%0.2f degrees C, %0.2f degrees F' % (deg_c, deg_f)

import gotemp

sensor = gotemp.Device('/dev/ldusb0')
sensor.open()

deg_c, deg_f = sensor.get_reading()
sensor.test_leds()

sensor.close()

print '%0.2f degrees C, %0.2f degrees F' % (deg_c, deg_f)

Real Examples

I currently use this library to log temperatures to a file every minute on a server, which then gets picked up, parsed, and sent to Graphite for archival and pretty graphs:

import time
import gotemp
from os import getenv

usb_dev = getenv('USB_DEVICE', '/dev/ldusb0')
with gotemp.Device(usb_dev) as sensor:
    deg_c, deg_f = sensor.get_reading()

print '%0.5f|%0.5f|%0.5f' % (time.time(), deg_c, deg_f)

Special Thanks

This couldn't have been done without community contributions from these lovely folks:

• The Herd Of Kittens' gotemp-ldusb.py utility (2008) (http://www.thok.org/intranet/python/vernier/README.html)
• Scott Tsai's gotemp-lights.py utility (2010) (https://gitorious.org/scottt/gotemp)

License

Copyright (c) 2013, Brian Cline. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.