No response in 'wishes' so just trying under questions:
I see for https://pubsubclient.knolleary.net/ that the MQTT client has been updated several times recently. Has/ will the rMQTT client be updated to the latest version? Also has the B4X Broker been updated recently?
Thanks
I admit that when someone just writes: there is a new version, can library X be updated I don't give it too much attention. Better to say, there is a problem X and it is solved by this update.