What is it?

Small adapter board to use a TV remote as a keyboard for a HTPC through HDMI CEC capabilities.

Why did you make it?

I recently moved from a RaspberryPi to a full HTPC and lost the CEC feature I really liked... I needed a replacement. There are few other available products on the market but I thought they were too expensive and/or too complex for my needs so I designed my own for cheap (apart from the PCB and HDMI headers, I has all the parts laying around).

I also had a Teensy2 connected to my RaspberryPi acting as an Ambilight controller through Hyperion. Instead of having two USB devices, I decided to try and merge them into a single board. On my small setup (22" TV, so around 100 RGB Leds), it's a success !

What makes it special?

It is cheap, simple, hackable, ...

Some of the nice features:

• Instead of requiring a host software (like cec-client) it acts as a standard keyboard.
• Provides Hyperion-compatible interface for Ambilight setups

It's not a dedicated development board, but it provides some nice development/debug features:

• a LED
• Input 5v can be selected from USB (default) or HDMI. In case you want to develop an autonomous device.
• ICSP header is broken out in case you break with the DFU feature or want to
• SPI Port is broken out ( mostly for the WS2811 LED strip )
• TWI/I2C is wired to the HDMI bus. The goal is to be able to read the Physical address of the HDMI input.
• Hotplug Detection (HPD) is wired to the HDMI bus