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Iono is a general-purpose, professional input/output module based on a standard Arduino microcontroller.

iono Ethernet

This driver provides support for iono Ethernet employing the HTTP API provided by the IonoWeb library.

The default sketch installed in iono Ethernet exposes this API.

HSYCO Configuration

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

Note that the IONO I/O Server doesn't count in the I/O servers license total, so you don't need an extra I/O Server license to use IONO with HSYCO.


  • IP Address: the IP address assigned to iono;
  • Port: the TCP port (defaults to 80)

High Availability

  • Shutdown when inactive: defaults to true.


ID Default Values Description
startupevents true true generate IO events also during the driver’s start-up phase
false start generating events only after HSYCO is aligned with the current status of the system
pollinterval 0 0 the driver will use the push notifications sent by iono to monitor its changes
int > 0 the driver will poll iono's state with the specified time interval (in seconds). Push notifications won't be enabled
input1 digital digital the specified multi-mode input will be read as digital signal (DI<n>)
input3 voltage the specified multi-mode input will be read as analog voltage (AV<n>)
input4 current the specified multi-mode input will be read as analog current (AI<n>)
stabletime 100 int > 0 number of milliseconds an input must be stable before a push notification is sent by iono to HSYCO
minvariation 0.1 float > 0 minimun value variation (for analog inputs) to trigger an event
subscribehost <host_name> hostname or IP address to be used by iono to send push notifications. Leave blank to let the driver discover the local address


For inputs 1 to 4, depending on the 'input1' ... 'input4' options, only the corresponding datapoint will be created, i.e. di<n> (if digital), av<n> (if voltage) or ai<n> (if curent).

ID Value R/W Description
connection online R connection established
offline R HSYCO can't connect to the device
do<n> 0 R relay <n> (digital output) is off
W switch off relay <n>
1 R relay <n> (digital output) is on
W switch on relay <n>
di<n> 0 R digital input <n> is low
1 R digital input <n> is high
av<n> <val> R analog input <n> is reading a voltage equal to <val> (in Volts)
ai<n> <val> R analog input <n> is reading a current equal to <val> (in mA)
ao1 <val> W set the analog output to <val> Volts

User Interface

To control a digital output (DO1 ... DO6), add a button or a buttonicon object to your project page and set its address field to the corresponding datapoint:

Iono UI Buttonicon.png

Release Notes


  • the IONO I/O Server is now "free". Using it doesn't decrease the number of available I/O servers
  • "minvariation" option now also applies to polling mode
  • bug fix for I/O Server port option


  • initial release

iono is a registered trademark of Sfera Labs Srl