Hygrosens manufactures a number of sensors for measuring temperature, humidity, light level, pressure. Their devices use a common serial data format for a wide variety of sensors, include 1-wire sensors from Dallas. This library reads the output from Hygrosens devices and passes it to a calling function as a hash. I have included an example that outputs the readings in human readable format, and another that stores the readings into a MySQL database.

Humidity/Temperature sensor

Weather station with temperature, humidity (relative and absolute), light level and pressure. The 9V battery adapter is my own modification for my 9V wall-wart power supply.

Current Version
Download v0.6 here, or browse the previous versions

Sample Output

Temperature    : 21.75C
Rel. Humidity  : 30.84%
Dew Point      : 3.81C
Abs. Humidity  : 5.90%
Light Level    : 12
Light Level    : 0
Light Level    : 0
Light Level    : 0
Pressure       : 100194.38

Requirements

• Hygrosens hardware
• pyserial - available from pyserial.sourceforge.net
• Python language

Release Notes
v0.5 - Initial release with working class library and examples. Not enough documentation has been written yet.
v0.6 - Added weather.py example to graph the output from the weather station using RRDtool graphs.

Hygrosens Documents
The Hygrosens website is all in German, which I don't read. Here are english copies of some of their documentation

• Humidity Sensor Module - Plastic Enclosure
• Humidity Sensor Module - Stainless Enclosure
• Dallas DS1820 Temperature System
• Serial Communications Protocol
• Weather Station Documentation (German)
• Serial format documentation (German)