2026.8.3
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Denon RS-232

The Denon RS-232 integrationIntegrations connect and integrate Home Assistant with your devices, services, and more. [Learn more] lets you control Denon receivers by connecting to their RS-232 serial port. By connecting the receiver to your Home Assistant server using a serial (RS-232) cable or a USB-to-serial adapter, you get local control with push-based state updates.

Prerequisites

  • A Denon receiver that supports control over its RS-232 serial port.
  • A physical serial connection between your receiver and the system running Home Assistant, or ESPHome-based serial proxy.

Configuration

To add the Denon RS-232 hub to your Home Assistant instance, use this My button:

Manual configuration steps

If the above My button doesn’t work, you can also perform the following steps manually:

  • Browse to your Home Assistant instance.

  • Go to Settings > Devices & services.

  • In the bottom right corner, select the Add Integration button.

  • From the list, select Denon RS-232.

  • Follow the instructions on screen to complete the setup.

Supported functionality

The integration adds media player entities as an entityAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] for your receiver.

Media player controls

For supported receivers, you can use Home Assistant to:

  • Turn the receiver on and off
  • Change the volume
  • Mute and unmute the main zone
  • Select the input source
  • Select a tuner preset or FM frequency

Zones

If your receiver supports additional zones, Home Assistant adds separate media player entities for those zones.

  • Main zone
  • Zone 2
  • Zone 3

The available zones depend on your receiver model.

Source selection

The available input sources depend on the receiver model you select during setup.

Selecting tuner presets and frequencies

On the main zone, you can tune the receiver to a stored tuner preset or directly to an FM frequency. This works from the media browser, which lists the tuner presets, or by calling the media_player.play_media action with a media_content_type of channel.

The media_content_id can be a preset name from A1 through G8:

action: media_player.play_media
target:
  entity_id: media_player.denon_avr
data:
  media_content_type: channel
  media_content_id: "A1"

It can also be tuned to an FM frequency between 8750 (87.50 MHz) and 10800 (108.00 MHz):

action: media_player.play_media
target:
  entity_id: media_player.denon_avr
data:
  media_content_type: channel
  media_content_id: "9870"