Roon CEC Controller Extension should allow you to control Roon Core (⏮, ⏪, ▶️, ⏯, ⏸, ⏹, ⏩, ⏭ ) from your audio amplifier remote control, having your amplifier connected to a Roon Bridge via HDMI using CEC protocol.

You should install this extension on a device connected to your HDMI amplifier, probably your Roon Bridge (although you may have the Roon Bridge and the Roon Core on the same computer).

NB: This extension is heavily inspired by roon-extension-powermate.

It relies on

• the Node Roon API
• hdmi-cec which relies on libcec

It should work with any device that supports libcec:

• Raspberry Pi
• Vero4K+
• Pulse-Eight USB-CEC Adapter
• Pulse-Eight Intel NUC CEC Adapter
• Some Exynos SoCs
• NXP TDA995x
• Odroid C2 (Amlogic S905)

This is a work in progress (but it works for me). Use at your own risks.

Todo:

• Add volume control from Roon Core to the amplifier.
• Display music titles on Amplifier
• Power on amplifier / switch source automatically

Installing Node.js via package manager

wget -qO- https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get install -y nodejs

sudo apt-get install cec-utils

If you see the following error message while running the program, you probably have to take a closer look at the two following paragraphs.

events.js:183
      throw er; // Unhandled 'error' event
      ^

Error: read ECONNRESET
    at _errnoException (util.js:992:11)
    at Pipe.onread (net.js:618:25)

If you are on Raspberry Pi, you probable need to do these:

echo 'SUBSYSTEM=="vchiq",GROUP="video",MODE="0660"' > /etc/udev/rules.d/10-vchiq-permissions.rules
usermod -a -G video YourUnprivilegedUser

Log off, log back in.

If you are using a Pulse-Eight Intel NUC CEC Adapter, you probably want to add the current user to dialout group so that you have access to /dev/ttyACM0:

usermod -a -G dialout USERNAME

Log off, log back in.

echo "scan" | cec-client -s -d 1

git clone https://github.com/benjaminbellamy/roon-cec-controller-extension.git
cd roon-cec-controller-extension/
npm install
node .

Open Roon Control software, go to Setting, then Extensions and enable Roon CEC Controller.

• Edit roon-cec-controller-extension.service so that ExecStart and WorkingDirectory directories match your configuration.
• Copy roon-cec-controller-extension.service to /etc/systemd/system/:

sudo cp roon-cec-controller-extension.service /etc/systemd/system/

• Give access to nobody to your CEC hardware, for instance on NUC:

usermod -a -G dialout nobody

• Run the service:

systemctl start roon-cec-controller-extension.service 

• Enable it to run on boot:

systemctl enable roon-cec-controller-extension.service 

Et voilà !