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The DUMMY I/O Server is a virtual server that doesn’t actually connect to any external system, but simulates basic lighting and automation devices.

It could be used for project’s development, demonstrations, and to easily implement virtual devices with complex logic connecting to actual systems.

HSYCO Configuration

Add a DUMMY I/O Server in the I/O Servers section of the Settings and set its parameters:

High Availability

  • Shutdown when inactive: defaults to false.


ID Default Values Description
discovery true true automatically lists all virtual devices in the systemtopo.txt file
false auto-detect for devices is disabled
lights 10 0 ... 10000 number of on/off light devices to generate
dimmers 10 0 ... 10000 number of dimmer devices to generate
automations 10 0 ... 10000 number of automation devices to generate

The Device Configuration Database

The systemtopo.txt file contains the list of all virtual devices that should be directly associated to graphic objects in the Web-based user interface.

This file can be filled manually or automatically by HSYCO at start-up. To enable automatic discovery and automatic generation of devices’ information in the systemtopo.txt file, use the discovery option in Settings.

This is an example of an automatically generated systemtopo.txt file:

dummy.autom.1 : AUTOM ; VSHUT ; DUMMY
dummy.autom.2 : AUTOM ; VSHUT ; DUMMY
dummy.autom.3 : AUTOM ; VSHUT ; DUMMY
dummy.autom.4 : AUTOM ; VSHUT ; DUMMY
dummy.autom.5 : AUTOM ; VSHUT ; DUMMY
dummy.dimmer.1 : LIGHT ; DIMMER ; DUMMY
dummy.dimmer.2 : LIGHT ; DIMMER ; DUMMY
dummy.dimmer.3 : LIGHT ; DIMMER ; DUMMY
dummy.dimmer.4 : LIGHT ; DIMMER ; DUMMY
dummy.dimmer.5 : LIGHT ; DIMMER ; DUMMY
dummy.light.1 : LIGHT ; LIGHT ; DUMMY
dummy.light.2 : LIGHT ; LIGHT ; DUMMY
dummy.light.3 : LIGHT ; LIGHT ; DUMMY
dummy.light.4 : LIGHT ; LIGHT ; DUMMY
dummy.light.5 : LIGHT ; LIGHT ; DUMMY

You should then manually add comments and other optional parameters:

dummy.autom.1 : AUTOM ; VSHUT ; Dummy automation 1
dummy.autom.2 : AUTOM ; VSHUT ; Dummy automation 2


ID Value R/W Description
connection online R I/O Server ready
light.<n> 0 R light <n> is off
W switch off light <n>
off W
1 R light <n> is on
W switch on light <n>
on W
dimmer.<n> 0 R dimmer <n> is off
W switch off dimmer <n>
off W
1 W switch on dimmer <n>
on W
1% ... 100% R the light level of dimmer <n> corresponds to the reported value
W set the light level of dimmer <n> to the specified value
autom.<n> offup R autom <n> is stopped in upper position

(set to this value 30 seconds after a 'up' command)

offdown R autom <n> is stopped in lower position

(set to this value 30 seconds after a 'down' command)

stop W stop autom <n>
up R autom <n> is moving upwards (opening)
W move autom <n> upwards
down R autom <n> is moving downwards (closing)
W move autom <n> downwards

Virtual automation devices automatically go to the offup or offdown state 30 seconds after the up or down command.

User Interface

All the devices that have been added in systemtopo.txt (automatically or manually) are listed in the Project Editor and can be directly associated to button and dimmer objects.

For example, adding a slider for a dimmer requires just a few clicks and no additional EVENTS logic.

IO Servers Dummy Project Editor.png

Release Notes


  • initial release