NOTE: TEMP05 ceased production on June 30, 2003. It has been replaced by the TEMP08. The information on these web pages is provided for historical users of TEMP05.
(we're not kidding - we get a lot of e-mails with questions that are already addressed in the Frequently Asked Questions web page)
Note: 1-Wire is a registered Trademark of Dallas Semiconductor
The TEMP05 was originally developed by Midon Design to be a serial logging interface between the Dallas Semiconductor/Maxim 1-Wire bus and a host PC. It was set up to log temperatures from the Dallas Semiconductor 1-Wire Weather Station and up to 20 additional DS18S20 1-Wire Thermometers. It has since evolved to also read multiple Dallas Semiconductor 1-Wire Rain Gauges, 1-Wire Barometers, 1-Wire Humidity Sensors, and other 1-Wire devices, up to 60 in total. The TEMP05 can be configured to send records of sensor readings through the serial port every 1 to 99 minutes. This setting is adjustable in 1 minute increments. The temperatures can be sent in either Celsius or Fahrenheit, however with current software, the wind speed is only available in Miles Per Hour. A sample output string is shown in Figure 2.
The TEMP05 has an optional connector (J3) for an extension to a relay board, also available from Midon Design. The software is capable of actuating up to eight relays connected via the J3 extension. A separate kit is available for the relay interface, or you can "roll your own" fairly simply.
In my application (see Figure 1), the TEMP05 is connected to a PC running HomeSeer, a home automation package available from HomeSeer Technologies. Through the built-in scripting capabilities of HomeSeer, logged temperatures, wind speed and wind direction are stored on the PC disk and are provided real-time to a web page for display. HomeSeer can also be setup to act on specific temperature settings, for example, to turn on an alarm, or send an e-mail, if the temperature in the attic exceeds a pre-defined threshold. A sample script, for logging temperatures to a file and HomeSeer devices, is included in the reference section. You can view an example of the web page generated by TEMP05 and HomeSeer here.
TEMP05 can be used with just the DS18S20 sensors or with a mix of other 1-Wire sensors from Dallas/Maxim. Dallas has unfortunately discontinued their Weather Station project, however, it is not required to use the other functionality of the TEMP05. Texas Weather Instruments ships an equivalent weather station product. Another source of a 1-Wire Weather Station is Tecnologia Aplicada (AAG). Midon Design fully supports the Tecnologia Aplicada Version 3 weather station.
TEMP05 can be used with any combination of the following devices on the 1-Wire bus;
Figure 1 TEMP05Usage Application
Voltage #01= 02.23V 04.99V
Wind Dirn #01[D1F2000801340120]= WNW
Wind Speed[1AAB0000CDEF011D]=22 MPH, Gust =35
Last Updated January 1, 2020
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