Product manual

XStream-PKG-R™ RS-232/485 RF Modem – Product Manual v5.x00

4.2. Programming Examples

For information about entering and exiting AT and Binary Command Modes, refer to the

Command Mode section (p19).

4.2.1. AT Commands

Digi has provided XCTU software for programming the modem using an extensive list of AT

Commands. The XCTU software provides an interface that is divided into four tabs that facilitate

the following functions:

• PC Settings tab - Setup PC serial port to interface with an XStream RF Modem

• Range Test tab – Test XStream RF Modem's range in varying environments

• Terminal tab – Configure and read XStream RF Modem parameters using AT Commands

• Modem Configuration tab – Configure and read RF Modem parameters

To install the XCTU Software:

Navigate to: www.digi.com/support/ . Then select “XCTU” under the product list. Select the

appropriate driver to install the XCTU software.

PC Settings Tab

As stated in the Serial Communications section; in order to communicate data to the RF modem

through the PC, baud (serial data rate), data bit, parity and stop bit settings on the PC serial port

must match those of the RF modem. The PC Settings tab provides a software user interface that

facilitates the modification of PC serial port settings.

PC Setup

1. Set the DIP Switch to RS-232 mode. Switch 1 is ON (up) and the remaining 5 switches are

OFF (down).

2. Connect the male DB-9 connector of the PC with the female DB-9 connector of the RF

modem using an RS-232 cable.

3. Power the RF modem through the power connector.

4. Launch XCTU Software and select the PC Settings tab; then select parameter values from the

dropdown lists that match the current parameter values of the RF modem. (Refer to

Table 3.1 on for more information.)

Figure 4.2. RF Modem Configurations through a Serial Cable

Terminal Tab

A terminal program has been built into the XCTU software and is located under the Terminal tab.

The Terminal tab provides an easy-to-use interface for programming the modem.

Multiple AT Commands. Multiple AT commands can be entered on one line with one carriage

return at the end of the line. Each command must be delimited by a comma (spaces in between

are optional). The “AT” prefix is only sent before the first command and should not be included

with subsequent commands in a line.

System Response. When a command is sent to the modem, the modem will parse and execute

the command. Upon successful execution of a command, the modem returns an “OK” message. If

execution of a command results in an error, the modem returns an “ERROR” message.