PINGREQ of MQTT-SN

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Apr 19, 2015, 6:01:54 AM4/19/15

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Hi All,

Client ID in PINGREQ of MQTT-SN is optional.

this means the identified client is in the awake state in specification.

but, Client ID in MQTT is optional.

and gateway can recognize the client is sleep mode because of duration in DISCONNECT.

therefore, I think PINGREQ should not contain the Client ID.

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