The server does not support retained messages. Sent in a CONNACK or DISCONNECT packet when the client publishes a RETAIN message to a server that has not announced support for it.
Numeric value: 154
RetainNotSupported
mqtt The server does not support retained messages. Sent in a CONNACK or DISCONNECT packet when the client publishes a RETAIN message to a server that has not announced support for it.
Numeric value: 154