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USBTemp measures the temperature and connects via USB to your
computer.
USBTemp
provides a thermometer. It is based on the DS18S20 digital
thermometers. In addition, the thermometer connects to an USB port -
you can read the temperature using a commandline tool. In combination
with RRDTool you can easily create temperature graphs:
This
is a live graph of the temperature in Kaiserslautern, Germany - at
least if my server at home is up and running. I describe my setup at
home here: USBTemp: Continuous Temperature Monitoring.
At this time, USBTemp provides these
features:
The
current version can be downloaded from the "Download" page. The tarball
contains the firmware, the host software and the schematic.
The hardware consists of an ATMega168, the
DS18S20 temperature sensors and some support elements. It is described
on the USBTempHardware page.
The host software uses libusb to connect to
the hardware. You can query the device for available temperature
sensors:
$ ./usbtemp sensors
2 sensor(s) found, querying
sensor 0: ID 9F17A5010800 type: (DS18S20)
sensor 1: ID B46865010800 type: (DS18S20)
The IDs are the actual unique hardware IDs
of the DS18S20 sensors. Afterwards you can use the ID to query a
sensor:
/usbtemp temp B46865010800
searching sensor with id B46865010800 - using sensor handle 1
reading sensor 1 (°C): +1.1875
If you want to use the raw temperature
value in a script, simply discard stderr:
$ ./usbtemp temp B46865010800 2>/dev/null
+1.0000
The
host software only depends on libusb and has been tested on Linux and
Mac systems. With libusb-win32 it should be possible to compile it on
Windows as well - but this is currently untested.
TODO.
The microcontroller firmware uses several
libraries:
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so did you get the mega168 working? Would the new arduino mega3xx work it is similar to the 168? If so is it a usb keyboard? that would be easy to get keys in c. What speed logging? I have a 24 bit adc at 10ksps