How to Transmit UART Data with HDMI+CVBS Encoder Boards

Many customers want to transmit video, audio, and UART data using our encoder boards. Here’s a clear guide on what’s possible, the limitations, and the best way to achieve it.

---

1. Current Status of HDMI+CVBS Encoder Boards

Feature	HDMI+CVBS Encoder Board
Serial tab in web UI	❌ Not available
UART data transmission	❌ Not available by default; can be customized
Video/Audio Protocols	✅ RTSP (video/audio only) ✅ UDP (supports video/audio + UART if used with decoder)

Key point: The encoder board alone cannot decode UART data on a PC with VLC or other generic players. You need our paired decoder board.

---

2. How UART Data Transmission Works

1. Encoder Board
   • Accepts UART data input for transmission (UDP only).
   • RTSP stream is video/audio only; UART data cannot be sent via RTSP.
2. Decoder Board
   • Required to properly decode UART data from the encoder.
   • Generic video players (e.g., VLC) cannot decode UART data.

Illustration of Setup:

PC ---Ethernet---> HDMI+CVBS Encoder Board ---UDP---> Matching Decoder Board ---> UART Data Output

---

3. Alternative: AV (CVBS) Input with UART

If you are using AV (CVBS) input, you can use our dedicated converter board:

CVBS/AV Video to Ethernet IP Video Stream Converter Board

Feature	AV (CVBS) Converter Board
HDMI input	❌ Not supported
UART data input	✅ Supported
Data retrieval on PC	✅ TCP protocol

Tip: This is ideal if you only need UART + CVBS video streaming, and want to receive UART data directly on a PC.

---

4. Recommendations

• HDMI+CVBS input + UART: Must use both encoder and matching decoder.
• AV (CVBS) + UART: Use the AV converter board with TCP to retrieve UART data on PC.
• Do not expect VLC or generic players to decode UART data; they only handle video/audio streams.

---

Conclusion:
Our encoder boards can transmit UART data, but only with the matching decoder or the AV converter board. Understanding these options ensures you pick the right board for your system and avoid confusion or failed setups.