Index >> Support

ANxx: Application Notes

Application Notes helping you to understand how to use HW group products in you applications. Application Notes are intended for use by presenters, educators, administrators, and anyone else wanting more detailed information about a particular topic. As more Application Notes are developed, they will be added to this page.

  • AN44: The SNMP v3 is now supported in all the Poseidon2 units
    The SNMP v3 is now supported in all the Poseidon2 units. This is a major update that brings many advantages and improvements. The following text will explain all the advantages of the SNMP v3 and how to use it in the Poseidon2 devices.
  • AN43: Remote relay and water leak detection with HWg-WLD
    HWg-WLD – LAN water flood detector can detect water leaks but does not directly feature relay outputs. This Application Note shows how to signal leaks using remote relay outputs (Damocles 1208).
  • AN42: 0-20mA or 4-20mA current loop
    When using LAN and GSM sensors by HW group, it is important to understand the difference between a 0-20mA current loop and a 4-20mA current loop. This Application Note explains the difference.
  • AN41: TLS authentication when sending mail over SMTP (HW group products)
    TLS password authentication when sending e-mail over SMTP is becoming a standard.
    Some HW group devices support TLS (Transport Layer Security), some do not. This Application Note gives an overview and helps to find a solution.
  • AN40: Certified solution for deep frozen food products
    Poseidon 2250, HWg-STE and Captemp SQL 4 cerified for transport, storage and conservation of deep-frozen food temperature monitoring and control. Solution from Captemp, Lda is compatible with REGULATION (EC) No 37/2005, comply with EN 12830, EN 13485 and EN 13486 standards.
  • AN39: HW group IP sensors integration FAQ
    In the recent months, many partners are asking about issues with SW integration (HW group sensors to their software). This AN presents a brief summary of important and useful facts.
  • AN38: Monitoring HWg devices in Nagios – Introduction
    Introduction to Nagios for novice users who need to monitor sensor outputs (such as temperature/humidity in a server room) but have only limited experience with Nagios..
  • AN37: Box-2-Box Connection: Poseidon >> Damocles
    Box-2-Box mode connects inputs and outputs between two different units without any software. Poseidon communicates with Damocles using SNMP traps and transfers changes at an input to a remote output.
  • AN36: IP Thermostat with a Web interface
    Poseidon can be used for monitoring over an IP network, or as a thermostat or hygrostat. Application Note 36 describes the available local / remote thermostat function options and the Poseidon unit setup.
  • AN35: Poseidon – Preventing false alarms
    Poseidon monitoring unit sends SMS, e-mail, and SNMP traps whenever a sensor value is outside of a safe range. However, when the temperature or humidity fluctuates, the unit can send tens or hundreds of messages that are unnecessary and bother the user. AN35 describes ways of avoiding false alarms.
  • AN34: Examples of using Poseidon Industrial Bus
    The AN34 application example details the use of the Industrial Bus (RS-485) for connecting sensors to a Poseidon 1250 or 2251 unit. It describes in detail the wiring of cables and connectors, as well as the DIP switch settings for supplied accessories.
  • AN33: M1 - switch remote relay when alarm from NMS software occures
    Poseidon, in conjunction with the M1 a.k.a. Monitor one software, can be used to close a relay contact if a preset value (temperature, humidity, etc.) is exceeded. This AN describes one of the possible methods.
  • AN32: M1 - SMS alert from NMS software
    The M1 a.k.a. Monitor one is a monitoring software for Windows that works with SNMP-enabled devices. Besides notifying about alarm status by e-mail and by closing a contact (see AN33), the software also allows to send a text message (SMS) containing a specified text. The SMS is sent via a GSM modem connected to the computer, through the use of an external utility.
  • AN31: What's New in Poseidon XXXX Firmware
    On November 1, 2007, HW group released a cumulative update for all supported Poseidon models. This Application Note 31 describes firmware improvements and changes for individual models.
  • AN30: Poseidon & Damocles Installation Wizard
    Installation Wizard simplifies the use of Poseidon and Damocles products in your applications. Simply call the wizard from within your application to add, remove or configure a Poseidon or Damocles unit.
  • AN29: PosDamIO - use command line to control outputs
    Poseidon Damocles I/O is a line utility for Windows and UNIX. It enables to control Poseidon and Damocles units over XML interface, show list of sensor's states, inputs, outputs as well as to setup output to log. 1 or 0
  • AN28: Damocles family & Modbus/TCP
    Application examples show how to use the Modbus/TCP network protocol for communication with Damocles family products (models MINI and 2404). Use „Modbus Poll version 3.2“ program to test communication – Windows PC client over Modbus/TCP that is for free in limited version.
  • AN27: I/O Controller - connecting relay to 230V AC
    I/O Controller can read states of digital inputs and control 8 outputs over network. Inputs and outputs are designed for low voltage up to 50V. This application note describes how to connect relay to I/O Controller. You can control 230V AC (110) device over external relay or detect voltage over switching contact of 230V AC relay.
  • AN26: PortBox and Epson lx-300+
    Epson LX300 is a typical dot matrix printer with single sheet/fanfold paper feeder. It can be connected to LPT or RS-232. This article describes how to connect this printer to a serial port and make it accessible via ethernet network using the RS-232 - Ethernet converter PortBox.
  • AN25: Replace a serial printer with the PortStore - network serial buffer
    A serial printer is still nowadays used to monitor reports from various devices like is a central alarm unit or fire alarm. Sometime it can be useful to monitor printed data over Ethernet network or simply replace the serial printer with any unit and collect data over the network..
  • AN24: Using SP Duo dongle with Charon 2 DK
    Application example AN24 connecting SP Duo programming dongle to the Charon2 development kit module. How to connect SP Duo to the DK board over SPI as well as JTAG interface and use in the AVR studio.
  • AN23: Serial Tx Pause for Eth/RS-232 converter
    How to pause the remote transmition of data on Ethernet/RS-232/485 converters. This functionality is necessarry if you need to send the output data over RS-232 in precisely defined packets. This way you can ensure the precise timing on the serial port output.
  • AN22 - How to send an e-mail from the PortStore buffer device
    The PortStore buffer device has a feature to send an e-mail alert when power failure occurs or the buffer is getting full. These functions are great when you use PortStore as CDR/SMDR buffer for PBX in remote location. For using of this function is necessary to have installed a SMTP server on network which takes care of delivery of e-mails. This application note describes configuration of the PortStore with a freeware SMTP server for MS Windows - Free SMTP server
  • AN21: Controlling of IP Relay using program NetCat
    The IP Relay device contains except RS-232 serial port also another two relays, which switching on/off can be controlled over Ethernet (TCP/IP). Application Note 21 describe how to control relays from the Windows command line sending right sequence using program NetCat.
  • AN20: UDP Config in your application
    Most of the HW group devices allow you to set the IP address using UDP broadcast. It's implemented in the Hercules utility for example. The AN20 is for companies, who want to implement the device search in their applications

For more information use "Support & Download page"