I don’t know that it’s been a major priority on our side since the newest specification allows client IDs of the length that we use in Cayenne, but it’s certainly come up with a few of you here, as well as back in January in this thread. It seems that a lot of MQTT software on the web does not conform with the update in 3.1.1. I’ll log an issue internally to consider making this an option when adding a new MQTT device (or just shortening it across the board on new Client ID generation).
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