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I am using Arduino Uno with W5100 Ethernet shield with Web and Android dashboard.
I have had lots of issues with loss of communication, since the system has gone over to MQTT, some of them seem to be partially solved, but I still experience some problems. Mostly I get a problem of system non responding to the smartphone dashboard and not allowing to set any remote on/off command or read update readings from Androind and, recently, having tried all possible situations, I came to the conclusion that if I connect with two or more smartphones simultaneously, at least one of them, or both, do not connect any longer.
Is this a know issue?
is there a limit on how many phones are connected simultaneously to a system?
I must add to this, that if I connect via web, with a PC, I do not get the same problem.