SR226 Communication Protocol V3.26

API User Manual
Wuhan Lakeda Science And Technology Co., Ltd.

Table of Contents

1. Overview
2. Communication Protocol
   • 2.1 Control Commands (PC → Radar)
     • 2.1.1 Link Command
     • 2.1.2 Parameter Control
   • 2.2 Report Messages (Radar → PC)
     • 2.2.1 Track Data
     • 2.2.2 Heartbeat Packet
     • 2.2.3 Parameter Data

1. Overview

The SR226 Communication Protocol defines the UDP-based interface between the Radar and the PC terminal for the “XW/SR226-6000XP” security radar series.

It covers:

• Link commands
• Parameter control
• Track data
• Heartbeat packets
• Parameter data

2. Communication Protocol

• Radar and PC must be on the same subnet.
• UDP datagram protocol is used with Little Endian byte order.
• Communication flow:
  1. PC sends Link Command.
  2. Radar acquires PC IP/Port.
  3. Radar reports Track Data and Heartbeat Packets.

Two message types:

• PC → Radar: Control commands (Link, Parameter Control)
• Radar → PC: Report messages (Track Data, Heartbeat, Parameter Data)

2.1 Control Commands (PC → Radar)

2.1.1 Link Command

• The PC sends a 10-byte fixed link command.
• Radar responds with Track Data and Heartbeat Packets.
• Radar default IP: 192.168.0.100, Port: 12580.
• Send once per minute.

Link Command Format (10 bytes):

2.1.2 Parameter Control

Used for querying or modifying radar parameters.

General Message Format (32 bytes):

Parameter Type List:

• 1 – Status Query

  • Param1: Device type (fixed 0x01)
  • Param2: Status type (0–255, see Section 2.2.3 Table 5-1)
  • Param3/4: Default 0

• 2 – GPS & Orientation

  • Param1: Latitude (float, -90° to +90°)
  • Param2: Longitude (float, -180° to +180°)
  • Param3: Altitude (float, -500m to +10,000m)
  • Param4: Azimuth (float, 0–360°)

• 11 – Threshold Settings

  • Param1: Detection Threshold (float, 11.0–40.0 dB)
  • Param2: High-Speed Threshold (float, 1.0–40.0 m/s)
  • Param3: Low-Speed Threshold (float, 0.0–10.0 m/s)
  • Param4: Reserved

• 20 – Single Frame Command

  • Param1: Command header (0xA5), ID (0x10), Type (0x01), Address + Data1–4
  • Param2: Data5–8
  • Param3: Frame ID
  • Param4: Checksum

• 21 – Sector Parameters

  • Param1: Start Angle (byte, 0–255, unit 1.4063°)
  • Param1: End Angle (byte, 0–255)

• 22 – Silence Zone Parameters

  • Param1–2: Define up to 4 angular silence zones (start/end angles, 0–255)

2.2 Report Messages (Radar → PC)

2.2.1 Track Data

Radar continuously sends track reports after receiving a link command.

Track Data Format (per packet, variable size):

Then, per target (79 bytes each):

2.2.2 Heartbeat Packet

Format (16 bytes):

2.2.3 Parameter Data

Returned when radar status is queried.

Format (32 bytes):

Status Type Examples:

• 1: BIT State (receiver/transmitter channel health bits)
• 2: GPS & Orientation (Lat, Lon, Alt, Azimuth)
• 3: Working Parameters (mode, frequency, face ID)
• 11: Thresholds (dB/m/s values)
• 12: Firmware IDs (Device ID, Version Numbers)
• 21: Sector Parameters (start/end angles)
• 22: Silence Zone Parameters (multi-zone definitions)

Notes

• Minimum interval between control commands: 100ms.
• Checksum: Calculated as byte sum of specific fields.
• Sector & Silence Zones: Only valid for mechanically scanning radars.
• Elevation/Height: Default to 0 if radar lacks height measurement.