Integrations that work with Connect AUX-2
Denon RS-232
Power, volume, mute, inputs and tuner presets, plus Zone 2 and 3 where your receiver has them.
RS-232C port (DB9) on the receiver- TX/RX switch at X, the factory setting
LG TV via Serial
Power, volume, mute and inputs, even on TVs with no network connection.
- RS-232C port or 3.5 mm service jack
- TX/RX switch at II
Turn on RS-232C Control in the TV's service menu
Samsung TV via ExLink
Power, volume, mute and inputs, without the TV's network or Wi-Fi.
- 3.5 mm ExLink jack or USB-to-ExLink dongle
- TX/RX switch at X, the factory setting
- With the dongle, turn on EXT Link Support and USB Serial
Pin assignment varies between devices, so each serial port has a TX/RX switch that swaps the transmit and receive lines.
The serial connection doesn't use the internet. If you block your TV's internet access, Home Assistant can still control the TV over serial, within the commands its serial interface supports.
Set it up
Connect the serial port of your TV or receiver to RS-232 Port 1 or Port 2. See Cabling and adapters (opens in a new tab).
In Home Assistant, add the integration for your device.
During setup, select the Connect AUX-2 port from the list of serial ports. Connect AUX-2 has two serial ports, RS-232 Port 1 and RS-232 Port 2. Select the one you plugged the cable into.
Warning: connect serial equipment to RS-232 Port 1 or Port 2 only, never to the 3.5 mm audio output. See the port warning in Ports and controls (opens in a new tab).
For other devices and the TX/RX switch, see Controlling devices over serial (opens in a new tab). For an extra serial port or an RS-485 device, see Using a USB-to-serial dongle (opens in a new tab).
Troubleshooting
If your TV or receiver doesn't respond:
- Check that you selected the port you plugged the cable into, RS-232 Port 1 or RS-232 Port 2.
- Try the other TX/RX switch position.
- Check the converter cable and its pinout. See Cabling and adapters (opens in a new tab).
- LG and Samsung TVs have extra requirements, such as a setting to turn on in the TV. See the prerequisites for LG TV (opens in a new tab) and Samsung TV via ExLink (opens in a new tab).
