Discovery Packets
Device discovery packets are used to allow the network controller to discover all Art-Net devices attached to the network.
ArtPoll & ArtPollReply
The ArtPoll packet is sent 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 send the ArtPoll packet continuously with a repeat time of 2.5 to 3s.
The ArtPoll packet is 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 packet is 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 packet is broadcast to:
192.168.0.255
Upon receipt of an ArtPoll, all Art-Net devices respond by unicasting an ArtPollReply. Any device that does not respond with an ArtPollReply within 3s of the ArtPoll is considered to have disconnected.
