What is $SYS/keeplive for? about android

[binarybucks]

The Paho Java client does not provide a public interface to send Ping
messages to keep the connection alive. Thus I had to add a workaround by
manually publishing a PUB message to an arbitray topic.

On Thu, Feb 6, 2014 at 1:03 PM, JP Mens [email protected] wrote:

First notice of this as I'm still having big trouble with #33#33
.

Denied PUBLISH from jpm-nex4 (d0, q1, r0, m146, '$SYS/keepalive', ... (1 bytes))

I note the code contains

src/st/alr/mqttitude/services/ServiceBroker.java
770: MqttTopic topic = mqttClient.getTopic("$SYS/keepalive");

What's that for?

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Mit freundlichen Grüßen / With kind regards
Alexander Rust

[jpmens]

This should be documented somehow; people actually looking at broker logs (hah! who does that?!) may be worried (as I was). :-)

[binarybucks]

Documented in https://github.com/owntracks/owntracks/wiki/Android