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IEC 62056 21 Meter Binding

kreutpet edited this page May 29, 2016 · 8 revisions

Documentation of the IEC 62056-21 meter binding bundle


This binding is used to communicate to metering devices supporting serial communication according IEC 62056-21 mode C master. It can be used to read metering data from slaves such as gas, water, heat, or electricity meters. For further information read Wiki page of IEC 62056-21.

Information receive from the meter device are structured according IEC 62056-6-1:2013, Object identification system (OBIS). For further information read Wiki page of OBIS ("Object Identification System").

For installation of the binding, please see Wiki page Bindings.

IEC 62056 - 21 Meter Binding Configuration


The openhab.cfg file (in the folder '${openhab_home}/configurations') contain following config parameters to configure the binding. The configuration allows the definition of multiple meter devices.

#########################  IEC 620562-21 Meter Binding ####################
# the serial port to use for connecting to the metering device e.g. COM1 for Windows and /dev/ttyS0 or
# /dev/ttyUSB0 for Linux

# Delay of baud rate change in ms. Default is 0. USB to serial converters often require a delay of up to 250ms
# default is 0ms

# Enable handling of echos caused by some optical tranceivers
# default is true

# Perform a module status query every x seconds (optional, defaults to 600 (10 minutes)).

NOTE: the <meter-id1> will be used in both the binding item configs and the action calls to defined which of your meter devices is connected to the item.

Generic Item Binding Configuration

Item Binding Configuration

In order to bind an item to the data received from the meter device , you need to provide item configuration settings. The easiest way to do so is to add some binding information in your item file (in the folder configurations/items`). The syntax of the binding configuration strings accepted is the following: The syntax of an item configuration is shown in the following line in general:


Where meter-id matches one of the ids defined in your openhab.cfg file.

If you do not know the available OBIS on your meter device you propably find them on the local HMI of you meter device. Please review you manual of the meter device or read the instruction of your utility. You can also start openhab in debug mode, the binding will then dump all available OBIS it receives from the meter device in the osgi console.


Below is an example of represent the current energy counter tarif values as numeric items.

/* IEC 62056-21 Meter data */
Number Tarif_Period	"Chart Period"
Number Tarif1 "High price tarif [%d kwh]" (gEnergy) { iec6205621meter="meter1;1.8.1" }
Number Tarif2 "Low price tarif [%d kwh]" (gEnergy) { iec6205621meter="meter1;1.8.2" }
Number ActualEnergyConsumption "Actual energy consumption [%.2f KW]" <gEnergy> () { iec6205621meter="meter1;16.7" }


In order to calculate the daily accumulated energy consumption below item and script will allow you to present a chart in your sitemap. First create the necessary items:

Number Tarif1Today	"Daily Consumption High Price" (gEnergieConsumption)
Number Tarif2Today	"Daily Consumption Low Price" (gEnergieConsumption)

Second add below script to your rules:

rule "Energy chart"
    Item Tarif1 changed or
    Item Tarif2 changed
var Number tmp
var Number stopTarif1
var Number stopTarif2
var Number startTarif1
var Number startTarif2
if (Tarif1.state instanceof DecimalType && Tarif2.state instanceof DecimalType) {	
	stopTarif1  = Tarif1.maximumSince(now.toDateMidnight).state as DecimalType
	stopTarif2  = Tarif2.maximumSince(now.toDateMidnight).state as DecimalType
	        startTarif1 = Tarif1.minimumSince(now.toDateMidnight).state as DecimalType
	        startTarif2 = Tarif2.minimumSince(now.toDateMidnight).state as DecimalType
	        tmp = stopTarif1 - startTarif1
	        postUpdate(Tarif1Today, tmp)
	        tmp = stopTarif2 - startTarif2
	        postUpdate(Tarif2Today, tmp)

Third add below Frame to your sitemap:

Frame label="Energie" {
	Text item=Tarif1 icon="energy" {
		Frame {
			Text item=Tarif1 
			Text item=Tarif2
			Chart item=gEnergieConsumption period=D refresh=600	
			Chart item=gEnergieConsumption period=W refresh=3600 	
	Text item=ActualEnergyConsumption icon="energy" {
		Frame {
                          Text item=ActualEnergyConsumption
                          Switch item=ActualEnergyConsumption_Chart_Perdiod label="Period" mappings=[0="Hour", 1="Day", 2="Week"]
                          Chart item=ActualEnergyConsumption  period=h visibility=[ActualEnergyConsumption_Period==0, ActualUsage_Chart_Period==Uninitialized ]
                          Chart item=ActualEnergyConsumption  period=D visibility=[ActualEnergyConsumption_Chart_Period==1]
                          Chart item=ActualEnergyConsumption  period=W visibility=[ActualEnergyConsumption_Chart_Period==2]

Tested Hardware

The binding has been successfully tested with below hardware configuration:

feature overview


Setup intro

Linux and OS X





User Interfaces



(link to openHAB forum)



Application Integration



A good source of inspiration and tips from users gathered over the years. Be aware that things may have changed since they were written and some examples might not work correctly.

Please update the wiki if you do come across any out of date information.

Binding configurations

Use case examples

Item definition examples

Sitemap definition examples

Collections of Rules on a single page

Single Rules


Syntax highlighting for external editors

Release Notes

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