6 votes
Accepted

How does EMQ persist QoS 1/2 messages?

So how does EMQ persist QoS 1/2 messages until delivery, i.e. a reboot of the broker or with respect to memory limits? The answer seems to be: it doesn't. This issue on their bug tracker says: I ...
Aurora0001's user avatar
  • 18.5k
6 votes
Accepted

Subscribing to MQTT birth and will topics? (emqttd)

I would like to monitor clients connecting and disconnecting from a separate process that would be subscribing to a system topic where birth and will messages are posted. emqtt's User Guide shows a ...
Ghanima's user avatar
  • 2,539
4 votes
Accepted

MQTT Connection Using Keep-Alive > 5 Minutes Silently Disconnects on Azure VM Broker?

I found my issue and how to fix it. Posting as an answer here for completeness in case others have similar issues. Azure virtual machines (Resource Manager, not classic) can be created with a public ...
Nate Caleb's user avatar
3 votes

MQTT Connection Using Keep-Alive > 5 Minutes Silently Disconnects on Azure VM Broker?

Just to complete this question. As worked out in the comments. It looks like Azure's router drops connections that have been idle for 5 mins. See this Stack Overflow answer for details: https://...
hardillb's user avatar
  • 12.6k
2 votes

Is MQTT-SN still "new" or is it obsolete?

First off, great question (and starred as favo(u)rite +1). However after researching how to go about implementing MQTT-SN, it seems there isn't much activity in terms of development being done the ...
Mawg's user avatar
  • 3,110
1 vote

Is MQTT-SN still "new" or is it obsolete?

I can only speculate one one aspect of the question: Most IoT communication is now over WiFi or cellular instead of BLE or Zigbee so MQTT-SN isn't necessary. (I'll need to rethink my project ...
Sean Houlihane's user avatar
1 vote

MQTT Connection Using Keep-Alive > 5 Minutes Silently Disconnects on Azure VM Broker?

This. I can't remember where I captured this from, so I'm unable to link to source. All pinpoint accurate information though. Yes, Microsoft should bake in more appropriate values into their Azure ...
evilSnobu's user avatar
  • 111
1 vote

Subscribing to MQTT birth and will topics? (emqttd)

Well, not sure about the birth message and LWT (Last Will and Testament) is optional as per the spec. So, you wouldn't necessarily receive messages unless you had your broker customised to such ...
cogitoergosum's user avatar

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