SX-550-1701 Silex Technology, SX-550-1701 Datasheet - Page 47

• Manufacturer Part Number: SX-550-1701
• Description: WiFi / 802.11 Modules & Development Tools 802.11a/b/g Bridge Serial Server
• Manufacturer: Silex Technology

Specifications of SX-550-1701

• Interface Type: UART
• Board Size: 59.6 mm x 49.1 mm x 14.3 mm
• Security: 802.1xEAP, PEAP, WEP, WPAPSK, TKIP, WPA2, AES
• Operating Voltage: 3.3 VDC
• Operating Temperature Range: 0 C to + 50 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Once you are connected in console mode, you can send any of the console commands listed in Chapter
6. Be sure to terminate each console command with a carriage return (ASCII 13) or linefeed (ASCII 10)
character.
When you are finished using the console, you can return to the normal port operation by sending the
command EXIT followed by a return or linefeed character.
AT Commands
The SX-550 allows you to control the serial port using standard AT modem commands. This allows you,
for instance, to initiate connections and to switch between console mode and data mode by sending the
appropriate commands. These capabilities are similar to the console mode switching described in the
previous section, but has the following advantages;
The drawback, however, is that there is a slight delay when switching from data mode to AT command
mode.
To use the AT commands, you must first enable this capability using the I/O Port Settings internal web
page for the desired port (S1 for Serial Port 1 and S2 for Serial Port 2). Change the Port Filter setting to
AT in order to enable AT mode on that port and press the Submit button to save the change. You must
restart the SX-550 to make the change take effect.
You can also use the console to enable the AT capabilities. For example, the command
enables AT capabilities on Serial Port 1.
Note: If you use the AT commands on the serial ports, you cannot use SNMP traps or Email alerts for
that port (you can use the SNMP traps and Email filters on a different port and on the GPIOs).
SNMP Traps, Email Alerts, and GPIO Status
The SX-550 allows the user to define various alert conditions based on the state of the GPIOs or on data
received by the serial port. For example, you could cause an alert to occur if the signal on GPIO 3 goes
low, or if a certain user-defined string of characters is received on the serial port. When an alert occurs, it
can be sent as an SNMP trap and/or as an Email message.
The SX-550 also allows the user to set the GPIOs or read the state of the GPIO pins via console
commands (console commands can issued through the console port, via the console mode switch feature
described earlier in this chapter, via the AT#C command described in Chapter 6, or through TELNET). In
addition, you can use the SX-550 E-GPIO capability to send the state of the GPIO pins to a remote
computer through TCP/IP messages at a user-defined time interval.
Details on using these capabilities can be found in Chapter 6.
Part Number 40183-101
The AT commands are described in detail in Chapter 6.
Your device can initiate a network connection
Operation is compatible with software that uses the AT command set
SET PORT S1 FILTER AT
Silex SX-550 Developer's Guide
Page 39