Add randomness for retransmission time

PelionIoT / mbed-coap

CoAP C library - Builder and Parser for CoAP messages

Apache License 2.0

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Closed anttiylitokola closed 7 years ago

anttiylitokola commented 7 years ago

CoAP specification advice to use random value for retransmission purposes "ACK_RANDOM_FACTOR MUST NOT be decreased below 1.0, and it SHOULD have a value that is sufficiently different from 1.0 to provide some protection from synchronization effects."

anttiylitokola commented 7 years ago

@terhei, could you check this change as well?