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IP WatchDog2 Lite: PING restarter with SNMP

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IP WatchDog2 Lite monitors the availability of one or two LAN devices and automatically restarts them in case of failure. Unresponsive device (router, IP camera, WiFi AP, etc.) is detected by unavailable Web interface or no reply to PING. In such a case, IP WatchDog2 can reset the device and also alert the operator by e-mail or text message (SMS).

IP WatchDog2 periodically asks the monitored device to respond. For example, sends a PING request every minute. When there is no reply, the device can be restarted or power cycled, or the operator can be notified. Everything is fully automatic without human intervention.

IP WatchDog2 Lite monitors the availability of up to 10 devices, and can reset one or two physical devices (two output channels).
The monitoring is configurable to a great extent in IP WatchDog2 (method of monitoring, period, repeating, etc.). The second generation brings SNMP interface, ability to send text messages (SMS), and access via the online portal.

Typical applications include monitoring the availability of network devices (router, switch, WiFi AP – IP address monitoring), and restarting them if necessary. IP WatchDog2 can be used to detect an unresponsive IP camera or another LAN device.

Typical applications:

    • RESET if the device stops responding (WiFi AP / IP camera not responding to ping - automatically restart)
    • Power cycling or resetting a device (via a web interface)
    • Activation of a back-up Internet connection if the primary link fails (network monitoring)
IP WatchDog – PING relay 230V – device monitor

Front view    Rear view1   Product view

Rear view2    Rack 1U montage

HWg-SMS-GW2 for sending SMS



  • Ethernet: 10/100 Mbit/s
  • WEB: Built-in web server, manual reset and output control (web relay)
  • Availability monitoring: 10 devices (2 outputs for response)
    • Four methods of detecting availability:
      • Ping Out: IP WatchDog2 periodically sends PING requests
      • Ping In: IP WatchDog2 waits for a PING from a specified IP address
      • Web client: IP WatchDog2 periodically checks the availability of a given web page (web server monitor)
      • Web server: IP WatchDog2 waits for a request for its internal web page
  • Output relay: DC voltage max. 30V / 1A; AC voltage max. 50V / 0,5A
  • To simplify connection: PO/PF relay output for each channel
  • Sound output: Yes (internal)
  • Data logger: 200 records
  • Reaction to detected outage: Email, SNMP trap, HWg-Push, relay contact, audible alarm
  • Text messages (SMS): Alarms can be sent as text messages (SMS)
  • SMS-GW support: Text messages can be sent through a HWg-SMS-GW
  • M2M communication protocols: SNMP, XML, Modbus/TCP, HWg-Push
  • Operating temperature: -30°C to +85°C (-22°F to +185°F)
  • Mechanical: 100 x 94 x 25 [mm] – metal housing, can be mounted on a wall, in a 19" cabinet, or on a DIN rail
  • Supported software


IP WatchDog2 family

IP WatchDog2

  WEB interface Relay output Beeper External GSM modem Availability monitoring Modbus/TCP
Monitored devices PING
In / Out
Client / Server
RS-232 string
IP WatchDog2 Lite 2x 24V 10
IP WatchDog2 Industrial 2x 230V/16A 10



Usage examples

    IP WatchDog - IP address monitoring - IP address restart, web watchdog, ping restart, rs-232, web relay 110V, remote reboot, autonomous restart
  • Restarting a router / switch
    Every minute, a PING request is sent to the main and backup servers (ping monitor). If the connection fails, the power for a router / switch / WiFi AP (Access Point) is interrupted for a few seconds.
  • Monitoring / restarting the PC in an information stand
    Monitors the function of a PC in an autonomous information kiosk consisting of a PC with a touchscreen.
    If the monitored PC does not send an “I'm alive” signal (ping heartbeat or request for a web page), IP WatchDog2 alerts the operator or performs a remote reset of the PC.

  • Network watchdog – internet monitor
    Logs Internet connection outages, switching to a backup link if necessary / monitors the connection to a network.
    • Activation of a back-up link.
    • Outages are signaled by a built-in audible horn and by closing an output relay.
    • Outages are logged to the internal memory.
    • SMS alert can be sent over a local GSM modem.
    • Can be used as a LAN system monitor.

  • IP camera monitor and restarter

    Controlling back-up A/C + remote environment monitoring
    • Monitors the accessibility of the web interface of an IP camera.
    • In case of outage, the camera is restarted, or an alarm output is activated (e.g. in a security system).
    • Fully autonomous webcam watchdog, works without human intervention.


    Wireless router availability monitoring

    Controlling back-up A/C + remote environment monitoring
    • Monitors network connectivity at a remote site.
    • In case of an outage, the wireless router is automatically restarted.
    • In addition, the IP WatchDog2 web interface can be used for a remote restart of the router.
    • Remote reset of the router is logged, and an operator can be notified by e-mail.


Software, Online portal, Mobile apps

    Software and applications for IP WatchDog2
  • Configuration: UDP Config  – Configuring the IP address
  • Reaction to events: HWg-Trigger (MS Windows)
    Receives SNMP Trap from IP WatchDog2 and reacts (sends a SMS, displays a warning, switches a remote relay, ..).

  • Monitoring and logging: HWg-PDMS
    Monitoring software, detection charts, output to MS Excel.
  • Online service for remote monitoring:

  • Third-party software:
  • For programmers: HWg-SDK
    Description of the M2M interface and examples of collecting data and working with the protocols in several programming languages
    (JAVA, PHP, Borland C++ Builder 6.0, Microsoft Visual C++ 6.0, Borland Delphi 6.0, Microsoft Visual Basic & Excel VBA, VB.NET, C code for Linux, JavaScript (AJAX) Microsoft Visual C# 2005 (.NET))

>> Software and applications

Spare a power adapter

IP WatchDog2 Lite provides two physical channels to control the power to the connected device. Each channel features a NO/NC relay output as well as a powered PO/PF output.
With the PO/PF output, the connection is simpler and needs one power adapter less.
For details, see the product manual.

Connecting to the online portal

  • IP WatchDog2 Lite can be connected to the online portal.
  • Monitored device states, history and graphs can be viewed from anywhere over the web or in a mobile app.

>> About online portal

Text message (SMS) alerts

With the HWg-Trigger application for Windows

The HWg-Trigger application can be started on any MS Windows PC. This application, based on “IF – THEN“ rules, checks for device alarms, including outages. Alarm status can be notified e.g. by sending a SMS to a specified number.

Sending SMS over the LAN through a central SMS-GW

Text message alerts to outages of a monitored device can be sent from the device monitor, IP WatchDog2 Lite, using a central SMS-GW.
In the web interface of IP WatchDog2, configure the recipient's phone number and the IP address of your central “HWg-SMS-GW” gateway.
No software is necessary, only a working LAN connection is needed.

One “HWg-SMS-GW” gateway can be shared by several devices (e.g. Poseidon2 4002 in the picture).


Ordering and FAQ

    Ask for the price or details:
     - Web:  http://
    Country: *

    Spam protection. How many is SIX times six?

  • What is the difference between Lite and Industrial versions of the IP WatchDog2?
    See the table above. The Lite version is easier to mount in a 19" rack but it cannot be connected directly to a GSM modem and its relay outputs are rated for low voltage only.
  • What are PO/PF outputs for each channel?
    To simplify installation, IP WatchDog2 Lite can supply power through the relay contacts.
    • PF = Power over NO (Normally Open) – Connect a horn or another alarm signaling device.
    • PF = Power over NC (Normally Closed) – Connect the device to automatically restart.

  • Can the IP WatchDog2 ping monitor if my Internet connection works?
    Yes, it can be used as a network watchdog or web monitor device. The simplest method is to periodically test, using PING, the connection to a well-known server (e.g. Google). For the ping monitoring to work, the server must support PING reply. When there is no reply to ping device reboot takes place.
  • Can the IP WatchDog2 work as a LAN device watchdog, to detect the availability of any LAN device?
    Yes, as long as the device has a web interface or responds to PING. IP WatchDog2 can be used e.g. as a web server monitor or IP camera monitor.
  • Can IP WatchDog2 do ping restart (ping boot) - IP address monitoring and if no reply to ping automatically restart?
    Yes, the watchdog does continuous IP monitoring and if the IP address does not respond to ping device reboot takes place. It works as an autonomous restarter.
  • Can I manually turn the output on/off over the Web?
    Yes, an unused relay output can be controlled remotely via the web interface (web relay).
  • Does the IP watchdog always beep (internal audible alarm) when it detects an outage?
    No, not always. The built-in audio output can be assigned to one output channel, both output channels, or no output channel.
  • Is it possible to prevent repeated restart attempts if the monitored device still does not respond after the first ping boot (RESET)?
    Yes, set Timeout After Reboot to 0. Then, after RESET, IP WatchDog2 will wait for a signal (e.g. ping heartbeat) indicating that the monitored device is available.
  • I cannot “ping” the IP WatchDog2 from my computer, or vice versa. What is wrong?
    Make sure that the IP WatchDog2 web interface is accessible from your PC. If this works, make sure that no firewall is running on the computer that you use to test PING. If a firewall is running, turn it off.
    Even the MS Windows firewall can filter traffic. In the firewall configuration, make sure that the necessary ICMP messages – echo reply and echo request – are not blocked; allow them if needed. Some servers block ping requests to prevent Ping of Death attacks.
  • What can SNMP in IP WatchDog2 be used for?
    The product can be monitored remotely using the SNMP protocol, and can send SNMP Traps.
  • How many SMS recipients can be configured?
    Text messages can be sent through a HWg-SMS-GW gateway. IP WatchDog2 sends text messages to a maximum of 5 phone numbers.
  • Can I monitor the product on the SensDesk portal?
    Yes. The portal can, for example, send you an e-mail or a cell message if the connectivity to IP WatchDog2 fails.
  • Is there an app for my mobile phone?
    Yes. However, we primarily recommend to connect your IP WatchDog2 to the SensDesk portal and use the SensDesk Mobile app for your smartphone.
  • Is it possible to power IP WatchDog2 Lite over the Ethernet?
    No. Check the IP WatchDog2 Industrial version.
  • What is the warranty?
    The standard warranty is 2 years, can be extended upon request.
  • Where can I find the prices of your devices?
    Ask our distributors, or request a quote directly from us using the form at this page.



Product Description
IP WatchDog2 Lite Quick start set with a power adapter, CD with software, “IP WatchDog2 Lite plain” unit and a printed manual.
IP WatchDog2 Lite plain IP WatchDog2 Lite unit only. No power adapter, no other accessories.
HWg-SMS-GW3 SMS Gateway start set photo
Central GSM SMS gateway for sending text messages from other HW group devices over the LAN. Includes an internal GSM modem, an external antenna with 3m cable, a power adapter and a CD.
Mount plate E – 1U Mounting bracket for a rack, 1U installation of HWg-Ares, Poseidon2 3266/68 and other products. - item photo
Mount plate D Bracket for attaching HWg-Ares, Poseidon2 3266/68 or other products to a wall. - item photo
PowerEgg2 PowerEgg2 is designed for detecting and switching 110-230VAC mains power. Detection and control interface uses low-voltage contacts, mains voltage parts are electrically isolated.



IP Watchdog2 lite, ping monitor, network watchdog, remote reset, ping restart, web relay, web server monitor, IP address monitoring, ping heartbeat, ping boot, IP camera monitor, autonomous restarter, Ping device reboot, ping automatically restart,

SNMP, SNMP trap, SMS, SensDesk portal, IP watchdog, ping monitoring, network monitoring, internet monitor, web monitor device, remote restart, device monitor, ip monitoring, webcam watchdog, LAN system monitor, LAN device watchdog

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