RT4K-CEC

rt4k-cec.mp4

A repository demonstrating how to control RetroTink 4K devices using HDMI-CEC.

Materials

To get started, you will need the following:

• Homemade Pico-CEC
  Alternatively, you can use the prebuilt CEC_Enabler from LazerBear Industries.

• 1 USB-C OTG Y Cable
  Splits into two USB-C ports (one for data, one for power). The MOGOOD brand on Amazon has been tested.

• 1 USB-C to USB-C cable To connect the Pico-CEC to the OTG Y cable's data port.

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Setup Instructions

Hardware Setup

1. Connect the OTG Y Splitter Attach the splitter to the RT4K.

2. Power Connection Connect the USB-C power cable to the power input of the Y splitter.

3. CEC_Enabler Connection

   • Attach the CEC_Enabler to the RT4K HDMI output port.
   • Connect the HDMI OUT cable to the other end of the CEC_Enabler.
   • Connect the CEC_Enabler to the OTG Y splicer's data port using the TypeC to TypeC cable.

4. Profit

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Software Setup

1. Compile the CEC_Enabler Project Run the following commands to build the project:

   git clone https://github.com/cakehonolulu/RT4K-CEC --recursive
   cd RT4K-CEC/CEC_Enabler
   mkdir build
   cd build
   cmake ..
   make

2. Flash the CEC_Enabler

   • To enter flashing mode, connect the device to your computer while pressing the button on the dongle.
   • Copy the resulting CEC_Enabler.uf2 file to the CEC_Enabler.

3. Reconnect Everything

   • Reconnect all hardware components as described in the hardware setup.

4. Profit

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Controls

Use the remote's DPAD to control the RT4K:

• Up/Down/Left/Right: Navigate the RT4K menu.
• Back: Go back.
• Channel Up: Auto gain.
• Channel Down: Auto phase.
• Double-click (1.25s inbetween) up -> Open menu
• Double-click (1.25s inbetween) down -> Power on/off

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Notes

• Ensure all connections are secure before powering on the devices.
• Double-click detection could be much better, sometimes gives up false positives.

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