|Re: [paho-dev] MQTT-SN - Where to start from|
this is a good place to ask.
An MQTT-SN to MQTT gateway is currently being worked on and is available in the gateway branch of the Paho MQTT-SN repository:
This enables MQTT-SN clients to connect to Mosquitto or any other MQTT broker. We are very interested in any feedback you have on it. I think it's more capable than the gateway I was describing in the presentation you mention, so should be suitable for a wide variety of applications.
MQTT-SN is not yet implemented in Mosquitto - Roger would like to add it, but has a lot on his plate already, so I don't think it's likely to arrive anytime soon.
On 13/01/17 09:58, Moran Adrian wrote:
In first place, sorry if this is not the correct distribution list to ask my question (is not uniquely related to Paho client).
I have been reading about MQTT-SN protocol for few days, reading the specification (http://mqtt.org/new/wp-
content/uploads/2009/06/MQTT-), the Ian Craggs’ session at EclipseCon 2015 (https://www.eclipsecon.org/ SN_spec_v1.2.pdf na2015/sites/default/files/) and other ‘less official’ sites. slides/MQTT-SN-2015.odp
I know the technology is little bit immature yet, but I would like to start with some tests using MQTT-SN. When I started using MQTT I quickly recognized two main reference software (Paho as client and Mosquitto as broker), but in the case of MQTT-SN I can´t see any winning ‘reference code’ to be used. Is there any pure C Paho version that supports this protocol? I see this (https://github.com/eclipse/
paho.mqtt-sn.embedded-c), and after reading Ian Craggs’ slides from EclipseCon, the Nicholas J. Humfrey’s one (https://github.com/njh/mqtt- sn-tools) .
On the other side, I would need a Gateway to talk to. Of course I initially thought in Mosquitto and I saw that the feature is proposed (https://www.eclipse.org/
proposals/technology.), but I can´t see MQTT-SN in current Mosquitto source code (https://github.com/eclipse/ mosquitto/ mosquitto). Does it means that the protocol is not implemented yet in Mosquitto?
Finally, I saw in Paho MQTT-SN Embedded C client that it has code for a Gateway. I understand that it will be a tiny Gateway to be used on very resource limited devices, right? I mean, if the device is not so constrained Mosquitto alternative would be suitable, right?
I don´t mind if some features are not implemented on the selected client/gateway, I could try to implement them myself and contribute to the community.
Thank you so much for your guidance and sorry in the mail is too offtopic for this list.
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