openHAB

# Runtime Commands

It is possible to query and even change the state of entities like items or things. Therefore the console offers commands in various areas:

Note

Some of the described commands are executed on the internal database and could break your installation. Please use this functionality only if you know what you are doing!

# Examples

Query an item's state:

openhab> openhab:status Heating_GF_Corridor
OFF

Changing an item's state:

openhab> openhab:send Heating_GF_Corridor ON
Command has been sent successfully.

Get help for a command:

openhab> help openhab:send
Usage: openhab:send <item> <command> - sends a command for an item

# openHAB Commands

# Items

Command Description
openhab:status <item> shows the current status of an item
openhab:update <item> <state> sends a status update for an item
openhab:send <item> <command> sends a command for an item
openhab:items list [<pattern>] lists names and types of all items (matching the pattern, if given)
openhab:items clear removes all items
openhab:items remove <itemName> removes the given item

# Discovery

Command Description
openhab:discovery start <thingTypeUID!bindingID> runs a discovery on a given thing type or binding
openhab:discovery enableBackgroundDiscovery <PID> enables background discovery for the discovery service with the given PID
openhab:discovery disableBackgroundDiscovery <PID> disables background discovery for the discovery service with the given PID

# Inbox

Command Description
openhab:inbox list lists all current inbox entries
openhab:inbox listignored lists all ignored inbox entries
openhab:inbox approve <thingUID> <label> creates a thing for an inbox entry
openhab:inbox clear clears all current inbox entries
openhab:inbox ignore <thingUID> ignores an inbox entry permanently

# Things

Command Description
openhab:things list lists all things
openhab:things clear removes all managed things
Command Description
openhab:links list lists all links
openhab:links link <itemName> <channelUID> links an item with to channel
openhab:links unlink <itemName> <thingUID> unlinks an item with to channel
openhab:links clear removes all managed links
openhab:links orphan <list\|purge> lists/purges all orphaned - one missing element (either item or channel) - links

# Audio

Command Description
openhab:audio play [<sink>] <filename> plays a sound file from the $OPENHAB_CONF/sounds folder through the optionally specified audio sink(s)
openhab:audio play <sink> <filename> <volume> plays a sound file from the $OPENHAB_CONF/sounds folder through the specified audio sink(s) with the specified volume
openhab:audio stream [<sink>] <url> streams the sound from the url through the optionally specified audio sink(s)
openhab:audio sources lists the audio sources
openhab:audio sinks lists the audio sinks

# Voice

Command Description
openhab:voice say <text> speaks a text on the default audio sink with the default TTS and voice
openhab:voice voices lists available voices of the active TTS services
openhab:voice interpret <command> interprets a human language command

# Automation

Command Description
openhab:script <script to execute> Executes a script from the $OPENHAB_CONF/scripts folder

# Firmware

Command Description
openhab:firmware list <thingTypeUID> Lists the available firmwares for a thing type.
openhab:firmware status <thingUID> lists the firmware status for a thing
openhab:firmware update <thingUID> <firmware version> updates the firmware for a thing

# Users

Command Description
openhab:users list lists all users
openhab:users add <userId> <password> <role> adds a new user with the specified role
openhab:users remove <userId> removes the given user
openhab:users changePassword <userId> <newPassword> changes the password of a user
openhab:users listApiTokens lists the API tokens for all users
openhab:users addApiToken <userId> <tokenName> <scope> adds a new API token on behalf of the specified user for the specified scope
openhab:users rmApiToken <userId> <tokenName> removes (revokes) the specified API token
openhab:users clearSessions <userId> clear the refresh tokens associated with the user (will sign the user out of all sessions)

# Karaf Commands

Apache Karaf itself also provides many useful commands, especially for debugging and development purposes.

# Thread Monitor

When experiencing high CPU usage by openHAB, one of its threads might be running wild. Similarly to the familiar htop command on Linux, Karaf provides the ttop command to analyse CPU usage per thread.

The following example of the ttop command displays thread ID, name, state and various stats about each thread, all ordered by the CPU time:

ttop --stats=tid,name,state,waited_time,waited_count,blocked_time,blocked_count,user_time,cpu_time,user_time_perc,cpu_time_perc,lock_owner_id,lock_owner_name --order=cpu_time --millis=300

To get more information about a thread, you may use the following command, where XXXX is the thread ID:

threads XXXX

# Example

ttop screenshot

As you can see, there are a few rule and MapDB threads consuming a good amount, as well as openHAB's OSGiEventManager. To get more details about the OH-OSGiEventManager thread, use the threads command: threads 458
The following information is printed to the console:

Thread 458 OH-OSGiEventManager TIMED_WAITING
Stacktrace:
jdk.internal.misc.Unsafe.park line: -2
java.util.concurrent.locks.LockSupport.parkNanos line: 269
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos line: 1763
java.util.concurrent.LinkedBlockingQueue.poll line: 460
org.openhab.core.internal.events.ThreadedEventHandler.lambda$0 line: 59
org.openhab.core.internal.events.ThreadedEventHandler$$Lambda/0x0000000100b44258.run line: -1
java.lang.Thread.runWith line: 1596
java.lang.Thread.run line: 1583

# Heap & Thread Dumps

You can create a heap dump and thread dump of the JVM to analyse memory and thread leaks:

dev:dump-create
Created dump zip: 2025-08-08_171434.zip

You will find this ZIP in the $OPENHAB_USERDATA folder, usually /var/lib/openhab/ on Linux systems.

Please refer to the Karaf Developer Commands documentation (opens new window) for more information about all available commands.

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