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GSM gateway for text messages (SMS)

Wg-SMS-GW3 is a SMS gateway for sending text message alarms over a LAN. Send SMS alarms from other HW group products and software through a single gateway and a single SIM. No software needed, works over a LAN at the Box-2-Box level.

HW group devices and software tools use HWg-SMS-GW to send text messages (SMS, cell messages). The message recipient's phone number is always configured in the LAN device or software that sends the alarm.

By using just one SIM card, users of our Ethernet SMS gateway – the HWg-SMS-GW – avoid complicated management. Unlike "SMS by e-mail" solutions, the product does not depend on Internet connectivity to send cell message alerts.






  • Web-based configuration.
  • No software is needed to run anywhere in order to send text messages.
    • Box-2-Box mode allows two devices (e.g. a Poseidon2 and the SMS GW) to communicate over the LAN.
  • Message recipient's phone number is configured in the sending device. One HWg-SMS-GW text message gateway can send SMS alarms to dozens of different recipients.
  • SMS gateway supports a "SMS + Ring" function that dials a call to the alarm message recipient's number and lets the phone ring for a short time.
  • With an external antenna, the device can be used even at places with poor GSM coverage (data center).
  • Quad-Band GSM modem works with GSM coverage anywhere in the world.
  • Examples for programmers on using the product are available in the HWg-SDK (Borland C++, MS Visual C, VB, C#, PHP, JAVA and more).

Basic features

Basic features

  • Ethernet: 10/100 Mbit/s
  • Configuration: WEB interface
  • GSM antenna: External 3m cable, SMA
  • GSM standard: Quad-Band 850 / 900 / 1800 / 1900 MHz
  • Can be used to send SMS from:
  • Can be used to send SMS from the following software and services:
    • HWg-Trigger software
    • HWg-DCD software
    • Nagios monitoring software
    • www.SensDesk.com online service
    • M2M communication protocols: SNMP, XML, netGSM (http, SOAP)
    • Internal memory for outgoing SMS queue: 100 messages
    • Support for programmers: HWg-SDK
    • Mechanical: 76 x 93 x 28 mm, wall-mountable, fits on a DIN rail

Usage exmaples

Usage exmaples

Sending SMS alerts from Poseidon units over the LANsms-gw3-poseidon

  • Poseidon2 4002 sends an alarm message about a sensor value to Mr. Blue's phone number.
  • Using the Box-2-Box mode, it connects directly to the HWg GSM gateway (no software is needed).
  • HWg-SMS-GW contains a SIM card and sends cell message alerts on behalf of all devices in the network.
  • Message recipients' phone numbers (Mr. Purple, Mr. Green, ...) are configured in the sending device.
  • Together with the text message, it is also possible to call the recipient and let the phone ring for a short time (configured in the sending device).

HWg-Trigger: Monitoring software with SMS alarms over SMS GWsms-gw3-monitoring-with-sms

  • HWg-Trigger, an application for MS Windows, monitors the function of other products (Poseidon2 3266, HWg-STE Push, Damocles 1208, Poseidon 4002) over the LAN.
  • If a product is inaccessible or fails, a SMS alert is sent using HWg-SMS-GW in the same LAN.
  • Recipients' phone numbers (Mr. Purple, Mr. Green) are configured in HWg-Trigger.
  • HWg-SMS-GW contains a SIM card and sends text message alarms to different phone numbers.

Nagios SMS alertssms-gw3-nagios

  • Nagios NMS monitors other devices using SNMP.
  • In the Nagios system, a plugin enables SMS alerts over HWg-SMS-GW gateway.
  • The plugin configuration includes the phone numbers of text message alert recipients.
  • For details about obtaining and using the Nagios plugin, see the product manual.
  • The plugin was created in cooperation with Netways (MonitoringExchange: notify-poseidon-sms.pl).

SMS alerts from the SensDesk.com online portalsms-gw3-sensdesk

  • LAN and GSM sensors (HWg-STE Push and Ares 12) send data to the SensDesk.com online portal.
  • Your user account includes the IP address or DNS name of your HWg-SMS-GW (must be accessible at a public IP address).
  • The configuration of each sensor in your SensDesk account can include a phone number for alarm messages.
  • Note:
  • Ares 12 sends the alert to an out-of-range sensor value faster than the SensDesk portal; however, SensDesk allows to monitor and configure all alarms over the Web at a single place. In addition, SensDesk also monitors the network connectivity of Ares units, so it can for instance alert to an Ares unit's network connection failure.

Contact us

Vrážská 1418
153 00, Prague 5
Czech republic


Phone: (+420) 723 069 809
Fax: (+420) 773 553 054
E-mail: sales@st-hw.com 



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