livoxGen/Proto1: Refine auto-detection vs heuristic logic

docs/livox-gen1-lidar-dap-spec.md

@@ -145,7 +145,23 @@ The `livoxProto1` provider accepts the following parameters:
 
 ## Device Discovery and Connection
 
-The specification uses a retry-based connection strategy:
+The specification uses a retry-based connection strategy with two different approaches:
+
+### Connection Methods
+
+**1. Broadcast-Based Connection (connectToKnownDeviceReq)**
+- Uses device IP addresses discovered from broadcast advertisements
+- **smo-ip parameter**: Optional - if omitted, driver auto-detects the appropriate interface
+- **smo-subnet-nbits parameter**: Optional - used for validation if smo-ip is provided
+- **When to use**: When devices are actively broadcasting their presence
+
+**2. Heuristic Connection (connectByDeviceIdentifierReq)**
+- Generates device IP addresses from serial numbers using network prefix
+- **smo-ip parameter**: **Required** - needed to determine network prefix for IP generation
+- **smo-subnet-nbits parameter**: **Required** - needed to calculate valid device IP addresses
+- **When to use**: When devices are not broadcasting or for initial setup
+
+### Connection Strategy
 
 1. **Initial Check**: Check if device is already known from broadcasts
 2. **Direct Connect**: Attempt direct connection based on calculated IP address