Discovery Packets

Discovery Packets

Device discovery packets are used to allow the network controller to discover all Art-Net devices attached to the network.

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ArtPoll & ArtPollReply

The ArtPoll packet is broadcast by the Controllers in order to discover all other Art-Net devices attached to the network.

All Art-Net devices, including the sender of the ArtPoll, respond with an ArtPollReply packet.

Controllers should broadcast the ArtPoll packet continuously with a repeat time of 2.5 to 3s.

Both the ArtPoll and ArtPollReply packets are broadcast using the network’s directed broadcast address.

Example 1: Controller IP settings are:

IP Address          2.100.90.80

Subnet Mask:    255.0.0.0

Then the ArtPoll and ArtPollReply packets are broadcast to:

2.255.255.255

Example 2: Controller IP settings are:

IP Address          192.168.0.1

Subnet Mask:    255.255.255.0

Then the ArtPoll and ArtPollReply packets are broadcast to:

192.168.0.255

Upon receipt of an ArtPoll, all Art-Net devices broadcast an ArtPollReply to the directed broadcast address. Any device that does not respond with an ArtPollReply within 3s of the ArtPoll is considered to have disconnected.