[OASIS Issue Tracker] (MQTT-596) CONNECT keep alive max is 18h 12m and 15s!

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

Davide Lenzarini created MQTT-596:
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             Summary: CONNECT keep alive max is 18h 12m and 15s!
                 Key: MQTT-596
                 URL: https://issues.oasis-open.org/browse/MQTT-596
             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
          Issue Type: Improvement
            Reporter: Davide Lenzarini


Having a keep alive max of only 18h 12m and 15s can be a real limit for constrained IoT device that for instance needs to send a single message per day. A possible solution is to create a new CONNECT flags byte (anyway required to support security). So the current flag on bit 7 instead of reserved should be:
 * 0=no additional flags
 * 1= another byte of flags with the following structure
 ** Reserved (7)
 * Reserved (6)
 * Reserved (5)
 * Reserved (4)
 * Reserved (3)
 * Reserved (2)
 * Reserved (1)
 * KeepAliveUOM
 ** 0 = seconds
 ** 1 = minutes



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