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README.md

File metadata and controls

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drhd-control

This utility intended for control Dr.HD MA 444 FSE 50 HDMI 4x4 matrix over TCP/IP.

Config file format

Test script uses JSON file named config.json with following structure:

{
  "bind_to": "192.168.0.100",
  "device": "192.168.0.10",
  "device_mac": "ff:ff:ff:ff:ff:ff",
  "log_udp": "debug",
  "log_tcp": "debug",
  "num_req": 3
}

where:

  • bind_to (string) - local IP address to bind for discovery
  • device (string) - IP address of matrix (if known)
  • device_mac (string) - MAC address of matrix (if IP can't be used)
  • log_udp (string) - logging level for UDP discovery
  • log_tcp (string) - logging level for TCP communication
  • num_req (int) - number of requests when scanning for devices

Protocol info

  • Port 30600/UDP used for discovery
  • Port 8000/TCP used for matrix control

Network discovery

To find matrix in local network send single byte 0x61 to global broadcast ip 255.255.255.255 and UDP port 30600. Reply packet will be sent to your local IP and UDP port 30600.

Reply packet structure (55 bytes total):

6 bytes  - device MAC
4 bytes  - device IP
4 bytes  - gateway IP
4 bytes  - subnet mask
2 bytes  - port number (30600) in big-endian
2 bytes  - constant (?) 80 in big-endian
32 bytes - placeholder (?) zero-bytes
1 byte   - constant (?) 0x01