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CC2538: MAC 7s timeout

Part Number: CC2538
Other Parts Discussed in Thread: Z-STACK,

When debugging some AF:dataRequest transmit reliability issues we discovered that messages sent directly from ZC to ZED (direct, no ZR) are subject to a 7 second timeout (from the datarequest). The data confirm will return with ZMacTransactionExpired.

This has been tested to cause issues when sending multiple packets to ZED (using the ZC's queues). 

This does not apply when zstack is used as a coordinator or when the packet comes from another ZR or ZED in the network (NWK_INDIRECT_TIMEOUT applies here).


What can we do to increase the timeout specific to sleepy ZEDs directly connected to ZC?