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Re: [paho-dev] MQTT-SN talk at EclipseCon


I think that means MQTT-SN allows mesh networking (depending on the capabilties of the underlying transport like ZigBee, UDP). Do you?


On 03/16/2015 03:16 PM, Stefano Costa wrote:
Il 16/03/2015 15:50, Ian Craggs ha scritto:

MQTT-SN has features which take advantage of the underlying transport's
ability to support multicast or broadcast, like that in UDP for
instance.  This means that gateways (or servers) can advertise their
presence, and then clients can dynamically connect to them, switching
from one gateway to another as needed.

Every client can also multicast or broadcast messages.  This means that
messages can be sent to a gateway or another client without a connection
having to be established.  Each client could also relay messages that it
receives, or filter out those that it is not interested in.

So in MQTT-SN, you can use a connection to a server, similar to MQTT, or
you can use multicast to send messages to every other participant in the

ok thanks for clarification
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Ian Craggs
icraggs@xxxxxxxxxx                 IBM United Kingdom
Paho Project Lead; Committer on Mosquitto

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