We Ship Nearly Everywhere
to RS232 Translator
|Quickly turn your PC or modem into a SDI-12 compliant
data logger, with the Vegetronix SDI-12 RS232 translator board.
The translator will connect to your PC or
a RS232 interface, and allow you to communicate with SDI-12 compliant
sensors with simple serial commands.
use any serial port communication program such as the HyperTerminal
program which is installed on all Windows platforms, to communicate
with the device through a command line interface. You can also
write your own software programs to communicate with the translator
board, and merely need to target a serial port.
The translator allows you to pass through
standard SDI-12 commands, or you can set up the on-board scheduler, and it
will retrieve data at specified intervals.
We also carry a SDI-12
to USB translator that you may also be interested in.
SDI-12 to RS232 Translator
- Ultra-fast prototyping of SDI-12 sensor networks.
- Replacement of expensive data loggers.
- Environmental/Weather monitoring.
- Control and monitoring of irrigation systems.
- SDI-12 testing of sensors.
- Remote SDI-12 monitoring of sensors through a
- Wireless access of SD-12 Sensors.
- Fully SDI-12 compliant.
- Sends SDI-12 commands and passes back the
- Uses standard RS232 12V voltage levels (not
TTL voltage levels).
- Low power.
- Can be used with any serial communication
- Command line interface.
- Can interface with up to 62 SDI-12 sensors.
- 4 mounting holes in each corner.
Pricing and Ordering Info
For volume pricing Contact
||SDI-12 to RS232 translator
||6V to 24 VDC.
||1.5in x 2.0in
|Supported number of sensor
Other Vegetronix Products of Interest
Terminal Block TB1 (SDI-12 INTERFACE)
Terminal Block TB2 (INPUT
||+V in (6 to 24VDC)
|DB9 Serial Connector (NULL Modem)|
|2||TX (referenced to board)|
|3||RX (referenced to board)|
A serial communications
program must be used to access the translator. While the translator will
work with most any serial communications program, we recommend Termite for
Windows and only provide support for it. If you are having
dificulties, get it working with termite first, then switch to your
If you are using a USB to RS232 bridge cable, then when
you plug the USB Comm device into your computer it will randomly assign a
comm port number to the USB device. To determine which comm port the device has
been assigned to do the following:
Now that you have the correct comm port number for the device, you can setup Termite:
- Open Windows device manager. This can be access through the control pannel.
- Plug in the USB device. You should see the device under the tree node labled: "Ports (COM & LPT)"
- When you un-plug the USB device, that device should disapear. You now know the correct comm number.
- Open the Termite Program.
- Push the "Setting" button on the too bar.
- Select the comm port that you determined from the steps above.
- Set the Baud Rate to 9600.
- Data bits should be 8.
- Stop bits should be 1.
- Parity should be none.
- Flow Control should be none.
- Under the "Transmitted Text" group box, select "Append CR".
- Select Okay to close the Settings box.
the cursor on transmit text line, at the very bottom, and type random
text, and hit the enter key. The translator should respond with an
error message. At this point you know that the settings are
correct, and you can start sending correctly formatted commands.
You can setup the board to act as a
data logger and to sample the various sensors at periodic times, by using
the "ADD" command, or you can use the transparent mode, and send
the sensors any SDI-12 text string that you desire. "<CR>"
as used below means carriage return with no
line feed. Some communication software programs have an option to
automatically send a line feed with the carriage return. Make
sure this feature is disabled.
||Help - Lists all of the available
|ADD [sensor number
[sample period (in seconds, 0 for no sampling)],[use CRC (1:true/0:false)],
|Add a sensor/measurement number to
the scheduler which periodically goes out and samples the specified
sensor and measurement. You can specify sample period, and type, and
if you want to use CRC.
Example: ADD 0:0,120,0,0<CR> - sensor
1 is sampled every 2 minutes without CRC.
|DEL [sensor number
||Remove a sensor/measurement from
||Turn on the scheduler and begin
sampling for each sensor/measurement added using the ADD command.
|| Turn off the scheduler and stop
|QUERY [sensor address (0-9)]:[Measurement number]<CR>
||Returns the information specified
by a particular ADD commands, and SDI ID string.
|| Returns the version Number of the
SDI RS232 Translator.(Current Version: V2.6)
|READ [sensor address (0-9)]:[Measurement number]<CR>
|| Perform immediate measurement.
|| Transparently sends a string to SDI bus.
|DATA [sensor number (0-9)]:[Measurement number]<SDI values>
|| Response from logger to measurements.
If your sensor is working correctly you should never see these error codes.
|ER: (2) response ||The sensor has returned an unexpected number of parameters 'n' from the sensor response: atttn\r\n|
|ER: (3) response||The sensor has returned an invalid time 'ttt' from the sensor response: atttn\r\n|
SDI-12 Translator Board DimensionsPlease note that Mils are thousands of an inch NOT millimeters.
How to Get Started
The best way to get started is to order a few
translators and try them out in your application.