Android Question MQTT and PINGREQ

[quique]

Hi! I am just getting my feet wet into MQTT under B4A... and I cannot seem to find a way to issue a PINGREQ.

I've seen that Erel and other's code just go publishing into a topic as a way of "pinging" the Broker, but I would very much like to use the real PING functionality that MQTT protocol specifies, which is only 2 bytes long.

I just need to send 192,0 (2 bytes) and wait for 208,0 as a PONG ...

Did anyone got this working or can give me a hint ?

Also: My app seems to "freeze" for several seconds when starting up. Is this the mqtt library "starting up" ?

Regards,

Enrique

 

[Erel]

Also: My app seems to "freeze" for several seconds when starting up. Is this the mqtt library "starting up" ?

Unlikely. You should start a new thread for this.

Ping requests are sent automatically based on the keep alive interval. Default value is 60 seconds.
You shouldn't try to use it in the application level.

 

[quique]

Thanks Erel. I did not find a "keep alive" setting, so I was having doubts about the whole thing, but now it is ok and I can work with 60 seconds PINGS.