Art-Net vs sACN: Choosing the Right Protocol¶

Both Art-Net and sACN are professional lighting control protocols, but they serve different purposes and excel in different scenarios. This guide helps you choose the best protocol for your setup.

Standards Background: - Art-Net - Proprietary protocol by Artistic Licence, widely adopted industry standard - sACN - ANSI E1.31 official standard by Entertainment Services and Technology Association (ESTA)

Quick Decision Matrix¶

Protocol Comparison¶

Network Transport¶

Art-Net: - Uses UDP broadcast (255.255.255.255) or unicast - Port 6454 - Simple broadcast means all devices see all traffic - Works on any standard Ethernet network

sACN: - Uses IP multicast (239.255.x.y) or unicast fallback - Port 5568
- Efficient: only interested receivers get the data - Requires multicast-capable network infrastructure

Art-Net Broadcast Network¶

graph TB
    HA1[Home Assistant] -->|UDP Broadcast| SWITCH1[Network Switch]
    SWITCH1 --> ALL1[All Devices<br/>Process or Ignore]
    ALL1 --> NODE1[Art-Net Node 1]
    ALL1 --> NODE2[Art-Net Node 2]
    ALL1 --> CONSOLE1[Art-Net Controller]

    classDef ha fill:#4CAF50,stroke:#2E7D32,color:#fff
    classDef artnet fill:#FF6B6B,stroke:#E63946,color:#fff
    classDef network fill:#45B7D1,stroke:#2980B9,color:#fff

    class HA1 ha
    class NODE1,NODE2,CONSOLE1 artnet
    class SWITCH1,ALL1 network

sACN Multicast Network¶

graph TB
    HA2[Home Assistant] -->|Multicast Join| SWITCH2[Managed Switch<br/>IGMP Snooping]
    SWITCH2 -->|Only to Members| GROUP[Multicast Group<br/>239.255.0.1]
    GROUP --> NODE3[sACN Node 1]
    GROUP --> NODE4[sACN Node 2]
    CONSOLE2[sACN Controller] -.->|Not Subscribed| SWITCH2

    classDef ha fill:#4CAF50,stroke:#2E7D32,color:#fff
    classDef sacn fill:#4ECDC4,stroke:#26A69A,color:#fff
    classDef network fill:#45B7D1,stroke:#2980B9,color:#fff

    class HA2 ha
    class NODE3,NODE4,CONSOLE2 sacn
    class SWITCH2,GROUP network

Universe Addressing¶

Art-Net: - Universe range: 0-32,767 (but practically 0-511 per subnet) - Uses Net/Subnet/Universe addressing (e.g., 1/2/0) - 15-bit universe addressing within 4-bit net/subnet structure

sACN: - Universe range: 1-63,999 - Simple integer universe IDs (e.g., Universe 1, Universe 42, Universe 5000) - No subnet limitations

Multi-Controller Support¶

Art-Net: - HTP (Highest Takes Precedence) or LTP (Latest Takes Precedence) merge at receiver level - ArtTrigger system - Send trigger messages mapped to Home Assistant events - Manual configuration required for controller coordination - No automatic failover

sACN: - Built-in priority system (0-200, higher wins) - Automatic failover when higher-priority source disappears - Per-universe priority and per-address priority support

Synchronization¶

sACN: - Built-in synchronization via sync universe - All receivers can wait for sync signal before applying data - Frame-accurate timing for complex effects

Art-Net: - ArtSync packets for universe synchronization - Optional feature, not widely implemented - Manual timing coordination

Network Requirements Comparison¶

Art-Net Network Needs¶

✅ Advantages:

• Works on any standard Ethernet network
• No special router/switch configuration needed
• WiFi friendly (broadcast works everywhere)
• Zero network administration required

⚠️ Limitations:

• Broadcast traffic affects all network devices
• Can overwhelm networks with many universes
• No built-in traffic optimization

sACN Network Needs¶

✅ Advantages:

• Multicast efficiency - only subscribers receive data
• Scales well to large installations
• Professional network optimization

⚠️ Requirements:

• Managed switches with IGMP snooping
• Multicast-capable routers
• WiFi multicast forwarding enabled
• Network administration knowledge helpful

Installation Scenarios¶

Scenario 1: Home Theater Setup¶

Setup: Living room with RGB LED strips, smart switches, couple of moving heads

Recommendation: Art-Net

Why Art-Net wins: - Simple setup with consumer network equipment - Few devices, so broadcast traffic is minimal
- Easy troubleshooting with standard tools - Broader device compatibility - ArtTrigger events for Home Assistant automation integration

dmx:
  artnet:
    universes:
      - 0:
          devices:
            - TV Backlight:
                fixture: generic-rgb
                start_address: 1
            - Ceiling Spots:
                fixture: generic-rgbw  
                start_address: 10

Scenario 2: Nightclub Installation¶

Setup: 200+ LED fixtures, multiple lighting consoles, backup systems required

Recommendation: sACN

Why sACN wins: - Multicast efficiency with hundreds of fixtures - Priority system for console backup/override - Professional standard expected by lighting techs - Synchronization for tight visual effects

dmx:
  sacn:
    source_name: "Main Lighting Controller"
    priority: 100
    sync_address: 7000

    universes:
      - 1:   # DJ Booth RGB
      - 2:   # Dance Floor Wash
      - 3:   # Moving Heads
      - 4:   # LED Wall
      # ... up to universe 50+

Scenario 3: Mixed Professional Environment¶

Setup: Permanent installation with mix of old Art-Net gear and new sACN equipment

Recommendation: Both Protocols

Run simultaneously on different universes:

dmx:
  # Legacy equipment on Art-Net
  artnet:
    universes:
      - 0:   # Old dimmer racks
      - 1:   # Legacy LED controllers

  # New equipment on sACN  
  sacn:
    universes:
      - 10:  # Modern LED fixtures
      - 11:  # New moving lights

Future Considerations¶

sACN Adoption:

• New professional equipment primarily sACN
• Lighting console manufacturers prioritize sACN development
• ANSI standard updates continue (E1.31-2018, etc.)

Art-Net Persistence:

• Still dominant in retrofit and home installations
• Art-Net 4 adds some sACN-like features
• Broad compatibility ensures continued use

RDMnet Evolution:

• Built on sACN foundation
• Bi-directional communication for device management
• Future of professional lighting control

The choice between Art-Net and sACN ultimately depends on your specific installation requirements, network capabilities, and long-term maintenance considerations.

Art-Net™ Designed by and Copyright Artistic Licence