STE2 r2: LAN and WiFi thermometer for remote monitoring

STE2 r2 can connect up to 5 Sensors (5 sensor values) via 2x RJ11 port (1-Wire & 1-Wire UNI) and up to 2 Detectors via DI (Digital Inputs) for dry contacts.

A built-in web server is used for device configuration. STE2 r2 is a device with SNMP support designated for remote monitoring Temperature, Relative Humidity, and other external sensors.

The device can be connected via Ethernet or WiFi. When the measured temperature (humidity, voltage, ..) on the external sensor(s) exceeds the defined Min-Max range (Safe Range), STE2 r2 sends an email alert ( or SMS, or Voice Call). In the device configuration, there is the Alarms tab, where you can define up to 3 sets of targets and assign them to individual sensors.

STE2 r2 is Standalone Monitoring device, which means the device can be fully configured via the web, can send emails itself (SMTP server), supports SNMP, etc. The connection of the device to the Portal (SensDesk Technology) is possible but is not enabled by default. The portal has to be manually activated as a functional extension (central device management, data history, SMS, and Voice Call alerts). The manufacturer provides limited free of charge portal service ( and paid service (, check the Portal providers for other available portals.

The STE2 r2 package includes a universal power adaptor. The device can be also powered from the PoE. One temperature sensor is also included.

It is supplied with free HWg-PDMS windows software to create graphs and export data to MS Excel.

Mobile App HWg monitor (IOs & Android) display current sensor values from devices on the LAN (WiFi) together with sensor values from the SensDesk Technology portal.

  • Up to 5 sensors (1-Wire + 1-Wire UNI) and 2 DI (Digital Inputs) for Detectors
  • Alarm alerts by e-mail and text messages (SMS), STE2 r2 includes the option to dial the target number (requires external gateway)
  • M2M communication protocols: SNMP, XML, WWW interface with HTTP(s)
  • Connected via LAN and WiFi (built-in antenna) - simultaneous connection possible.
  • NMS connectivity (SNMP MIB); simple installation; supports DHCP; supports TLS authentication (Gmail).
  • A sensor or DI alarm sends an alert by e-mail, SMS or Ring.For Ring or SMS alarm use the HWg-SMS-GW3 gateway in the same LAN.
  • SensDesk portal compatible device (IoT projects)
  • Powered from included external 5V power adaptor or PoE.
  • With the enclosed HWg-PDMS software, logged data can be exported to MS Excel.
  • Compatible with a range of third party SW. Examples for programmers on using the product are available in the HWg-SDK (Borland C++, MS Visual, VB, C#, PHP, JAVA and more).
Applications and usage: 
  • Air conditioning failure detection
  • Monitoring of refrigerator or freezers
  • Drug storage + reports (by SensDesk)
  • Food storage
  • Remote industrial environment monitoring
  • Temperature and humidity monitoring
  • CO2 monitoring
  • Water Flood detection (spot detection / Water Leak Detection sensing cable)
  • Electrical current monitoring

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Compatible Sensors & Detectors


Up to 5 external sensors (RJ11) + 2 DI detectors can be connected to the STE2 r2 device. 

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Setting the device

  • Connect the STE2 r2 Thermometer to the network via a LAN or by using the built-in WiFi antenna.
  • The device has a built-in WEB server, you will need only a standard web browser. HTTPS is also supported.
  • Connect external sensors + detectors
  • Define Alerts
    • The device will alert you by email when the sensor value exceeds "Safe range" or the DI input is closed.
    • Email can be delayed or sent periodically. STE2 r2 supports also TLS so the Gmail SMTP servers can be used.
    • Use external SMS- GW3 for SMS alerts

SensDesk Technology Portal

SensDesk Technology portal together with STE2 r2 is a remote monitoring system. See this application note which describes how to create a user account and add a device to the SensDesk portal.

  • SensDesk portal offers simple configuration, central device management, and tools for remote overview of sensors
  • SensDesk portal will alert you even for STE2 devices disconnected from the internet. 
  • SensDesk portal is able to send alerts (e-mail, SMS, Voice Calls), show graphs, create reports, store historical data, connect data via open API...
You can connect:  Up to 5 sensors (Temperature (Pt1000) Humidity CO2 Water Leak detection  Barometric Pressure Current (4-20 mA) Voltage) and 2 DI inputs

Sensor values in graphs & reports

HWg-PDMS windows-based software allows you to transfer the measured values to graph form and export data to MS Excel. You can easily create comprehensible reports with graphical representations of temperature in one or a number of locations.

SensDesk Technology portal shows sensor value graphs and alerts you when the STE2 device is not working or any sensor is out of defined limits. For an example of working with charts in SensDesk, see the application note.

3rd party software or applications can use SNMP or XML Open API protocols. 
In the video below you can see a very detailed review of STE2 r2 by Csongor Varga.
STE2 r2 & SensDesk: In the video below we are talking about how to connect the STE2 r2 to SensDesk portal
In the video below, we are talking about how to connect the STE2 r2 web thermometer to LAN via WIFI or WIFI + LAN.
In the video below, we are going to show you how to set up your Gmail account for email alerts on STE2 r2.
In the video below, we are showing where can find all the technical parameters and how to compare STE2 r2 with other devices
STE2 - remote monitoring system by HW group

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