HI, IN the spec shhet, those are the value for the Delivery status field of the Zigbee Transmit Status (0x8B) frame type :
0x00 = Success
0x02 = CCA failure
0x15 = Invalid destination EndPoint
0x21 = Network ACK failure
0x22 = Not join to network
0x23 = Self-Adressed
0x24 = Address not found
0x25 = Route not found
0x74 = Data payload to large
I receive some times 0x91… so I guess there’s is some info missing on this status. Can anyone help me find what 0x91 means and what are the other possible value for this status ?