Re: [m2m-iwg] COAP

[Matteo Collina <matteo.collina@xxxxxxxxx>]

The real difference between CoAP and MQTT is in how the notification of events works:

http://tools.ietf.org/html/draft-ietf-core-observe-08

In practice, it is the "gateway" or end-user that start observing for changes on the sensor.

In MQTT, it is the other way around, it is the sensor that publishes stuff on a broker.

However CoAP allows some true P2P communication between devices, which is not possible in a central system like MQTT. 

It has a real difference, and it may be the reason because it lacks adoption.

I think deploying a central client-server system is much easier.

Cheers,

Matteo