The utilities available for the server allow specific trouble shooting of certain subsystems and/or calibration of sensors. All one-wire devices are supported by the Dallas Semiconductor 1-Wire SDK (Software Development Kit). Currently the barometer is the device requiring this type of support for calibration.
The Dallas Semiconductor 1-Wire SDK (Software Development Kit) has a variety of utilities for checking the proper operation of the various devices on the 1-Wire bus. The utilities are available for both Linux and Windows.
You will need to consult the documentation that comes with the SDK on the purpose and use of each utility. The table below lists the most commonly used utilities and their purpose.
Utility Used By Purpose tstfind n/a Tests and locates all 1-Wire Devices on the 1-Wire bus. Note that the last two digits signify what type of 1-Wire device was found. See the 1-Wire online documentation for more information on this. temp Outdoor, indoor and soil temperature sensors Exercises the DS18S20 temperature sensor. It will read out the cuurent temperature of each DS18S20 until the program is interrupted gethumd Outdoor humidity, barometer Exercises the DS2438 A/D converter. Assumes that a Honeywell HIH-3610 humidity sensor (or the equivalent) is attached to the DS2438. For the humidity sensor, it will read percent of humidity. For the barometer, the reading will at best be non-sense. The sensor scaling circuit puts out a voltage between 0.5 VDC and 8.5 VDC depending on the pressure and calibration settings. swtsngl Rain gauge heater, aspirator Exercises the DS2405 PIO switch.
To check the 1-Wire devices used by the T-238/T-238+, you will need to disconnect both 1-Wire cables from the T-238/T-238+ and the serial port. You will then need to plug the 1-Wire cable from the T-238 weather instruments into the serial port adaptor. The 1-Wire utilities can then be used.
Use of the baromcal utility is covered in the kit documentation for the X1W-1 kit available from TAPR. The baromcal utility is available for both Linux and Windows and can be downloaded from TAPR.