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IP WatchDog2 Industrial: Ping restarter

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Detects device outage or unresponsiveness. Monitors device availability over LAN (PING/WEB) or serial line (RS-232). In case of outage, restarts the device automatically without human intervention. Up to 10 devices can be monitored.

IP WatchDog2 periodically checks the function of monitored devices (by transmitting or receiving an “I'm alive and OK” signal over LAN or RS-232). If the correct reply is not received in time, the device is restarted using a relay. Everything is automatic, without additional software or human intervention.

IP WatchDog2 Industrial monitors the availability of up to 10 devices. When an outage is detected, WatchDog2 reacts by power-cycling or restarting the device using its two output channels (relays). Other possible reactions to outages include sending an e-mail or a text message (SMS), or activating an audible alarm.

The industrial version of IP WatchDog2 includes a serial port (RS-232) that enables monitoring the function of machinery or connecting a GSM modem for sending text messages (SMS).
Industrial applications can benefit from DIN rail mount and output relays that can directly switch 110/230VAC, max. 16A.

  • Monitors up to 10 devices, provides 2 relay outputs rated at 110/230V / 16A
  • 5 methods of monitoring
  • RS-232 for monitoring machinery or connecting an external GSM modem
IP WatchDog - PING relé 230V - hlídací pes

Front view    Rear view   DIN rail view

Rear view2 

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)
  • Five 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 or web server (web watchdog)
    • Web server: IP WatchDog2 waits for a request for its internal web page
    • RS232 Rx: IP WatchDog2 waits for a sequence of characters in the RS-232 data stream (rs-232 watchdog)
  • Output channel: DO relay output (NO/NC, 230V/16A AC)
  • 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
    • Locally sent SMS:  RS-232 port can be used to connect a GSM modem
  • M2M communication protocols: SNMP, XML, Modbus/TCP, HWg-Push
  • Operating temperature: -30°C to +75°C (-22°F to +185°F)
  • Mechanical: 145 x 90 x 45 [mm] (wall-mountable, fits on a DIN rail)
  • Supported software
    • Online portal: (remote monitoring of several devices/sensors free of charge over the Web, can be connected to a mobile app).
    • Support for programmers: HWg-SDK


    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. This ping monitoring allows to perform an autonomous restart. If the connection fails, the power for a router / switch / WiFi AP (Access Point) is interrupted for a few seconds - the product acts as a ping relay.
    • IP camera monitor
      Monitors the accessibility of the web interface of an IP camera (as a web watchdog). In case of outage, the camera is restarted, or an alarm output is activated (e.g. in a security system).
    • WiFi AP device monitor
      Keeps checking if the network connection at a remote site works. In case of an outage, the WiFi router is automatically restarted.
      In addition, the IP WatchDog2 web interface can be used for a remote reboot of the router, as a remote power switch.
    • 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 reboot of the PC.

    • Network watchdog – connectivity monitoring
      Logs Internet connection outages, switching to a backup link if necessary / monitors the connection to a network. Use the product as an internet monitor - network monitoring relay.
      • 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

      Signaling the outage of one device out of a maximum of 10

      Controlling back-up A/C + remote environment monitoring
      • Every minute, a PING (ICMP) is sent to 4 configured devices.
      • If one of the 4 monitored devices fails, IP WatchDog2 switches a relay output (warning light), or sends an e-mail / SMS.

      Monitoring the function of a machine (RS-232 WatchDog)

      Controlling back-up A/C + remote environment monitoring
      • Detects the correct operation of machines and devices by the means of an incoming RS-232 string.
      • If the expected string does not arrive for too long, the operator is alerted by e-mail or SMS.
      • The relay output can be used to restart the machine, or to turn on a warning light.


    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

    Connecting to the online portal

    • IP WatchDog2 Industrial 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

    Sending SMS over the LAN through a central SMS-GW

    Text message alerts to outages of a monitored device can be sent from IP WatchDog2 Industrial 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).

    External GSM modem

    IP Watchdog2 Industrial features a RS-232 interface, which can be used to connect a machine (in order to monitor its function) or an external GSM modem.
    When the "SMS + Ring When Alarm" function is checked, the SMS alarm recipient's number is dialed to let it ring for a few seconds in order to alert to the alarm.

    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.

    Ordering and FAQ

      Ask for the price or details:
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      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 Industrial version is easier to mount on a DIN rail, the relay outputs can be directly used to switch 110/230V (power relay 230V / relay 110V), and a RS-232 serial port is present to connect a machine (for use as a rs-232 watchdog) or a GSM modem. Software functions, with the exception of added Modbus/TCP support, are identical.
    • Can the IP WatchDog2 monitor if my Internet connection works?
      Yes, it can be used as a network connectivity monitoring device. The simplest method is to periodically test, using PING, the connection to a well-known server, such as Google. For the ping monitoring to work, the server must support PING reply.
    • Can IP WatchDog2 perform IP address restart - that is, IP address monitoring and autonomous restart (ping boot)?
      Yes, it can periodically send ping requests to the server, and if there is no response to ping power off/on or reboot the server. In addition to ping server monitoring, it can also check for Web page requests / responses or a RS-232 string.
    • Can the device monitor, IP WatchDog2, detect the availability of any LAN device?
      Yes, as long as the device has a web interface or responds to PING. When the LAN device no longer responds to ping, automatically reboot using the IP WatchDog2 power relay 230V / relay 110V - the product works as a ping relay. As a web watchdog, IP WatchDog2 detects the accessibility of a given web page, or checks for requests addressed to its own web interface.
    • Can I manually turn the output on/off over the Web?
      Yes, an unused relay output can be controlled remotely via the web interface, turning the product into an on/off remote power switch / remote reset tool.
    • 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 RESET?
      Yes, set Timeout After Reboot to 0. Then, after RESET, IP WatchDog2 will wait for a signal 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.
    • How long does IP WatchDog2 ping relay wait after startup before performing the first reset? Is this delay configurable?
      The first reset after startup is controlled by the Timeout after reboot parameter.
    • What can SNMP in the IP WatchDog2 ping restarter 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?
      SMS can be sent via a HWg-SMS-GW gateway or an external GSM modem. IP WatchDog2 sends text messages to a maximum of 5 phone numbers.
    • Can I monitor the IP WatchDog2 network watchdog 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 ping monitor to the SensDesk portal and use the SensDesk Mobile app for your smartphone.
    • Can IP WatchDog2 be connected to a SCADA system?
      Yes. The "IP WatchDog2 Industrial" version supports Modbus/TCP, allowing integration with any industrial visualization software.
    • Is it possible to power IP WatchDog2 Industrial over the Ethernet?
      Not with the standard product version.
      Upon request, under a different ordering No., a PoE version can be supplied. This version can be powered from an external adapter also over the Ethernet (IEEE 802.3af).
    • 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 Industrial set Quick start set with a power adapter, CD with software, “IP WatchDog2 Industrial” unit and a printed manual.
    IP WatchDog2 Industrial IP WatchDog2 Industrial 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.
    GSM Quadband TC55i TC55i GSM Quadband modem for a RS-232 serial port. Includes an external antenna and an EU power adapter. Suitable for use in North and South America as well. - product photo



    IP Watchdog2 Industrial, ping relay, remote power switch, power relay 230V, remote reboot, rs-232 watchdog, device monitor, ping restarter, ping monitoring, network watchdog, relay 110V, web watchdog, IP address restart,

    Web relay, ping monitor, network watchdog, SensDesk portal, SNMP, SNMP trap, SMS alert, IP watchdog, internet monitor, IP camera monitor, remote reset, IP address monitoring, ping heartbeat, ping power, network monitoring relay, ping automatically reboot, ping boot, autonomous restart, network connectivity monitoring device, ping server monitoring

    Similar and related products

    • IP WatchDog2 Lite
      Monitors the availability and automatically restarts one or two LAN devices.
      Detects unresponsive devices (router, IP camera, etc.) by monitoring PING replies or web page accessibility.
    • HWg-SMS-GW3
      SMS gateway for sending text messages 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.

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