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Old February 25th, 2008   #3
sblair
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Yes, that was intentional. There are many different valid implementations and there was not a "one size fits all" approach that worked for everyone.

If you get an ACK_TIMER and the device does not support QUEUED_MESSAGES then you would go back and query the device again after the timer has expired.

It depends on the device as to whether it needs ACK_TIMER or not. There are many implementations where there is no need for ACK_TIMER as the information is immediately available.

A controller shouldn't worry about ACK_TIMER being supported in an end-device unless it gets an ACK_TIMER response.
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