Operate in API mode
API frames
XBee/XBee-PRO DigiMesh 2.4 RF Module User Guide
127
Transmit Status frame - 0x8B
Description
When a Transmit Request (0x10, 0x11) completes, the device sends a Transmit Status message out of
the serial interface. This message indicates if the Transmit Request was successful or if it failed.
Format
The following table provides the contents of the frame. For details on frame structure, see
Frame data
fields
Offset Description
Frame type
3
0x8B
Frame ID
4
Identifies the serial interface data frame being reported. If Frame ID = 0 in
the associated request frame, no response frame is delivered.
16-bit
destination
address
5
The 16-bit Network Address where the packet was delivered (if
successful). If not successful, this address is 0xFFFD (destination address
unknown).
6
Transmit retry
count
7
The number of application transmission retries that occur.
Delivery
status
8
0x00 = Success
0x01 = MAC ACK failure
0x02 = Collision avoidance failure
0x21 = Network ACK failure
0x25 = Route not found
0x31 = Internal resource error
0x32 = Internal error
Discovery
status
9
0x00 = No discovery overhead
0x02 = Route discovery
Example
In the following example, the destination device reports a successful unicast data transmission
successful and a route discovery occurred. The outgoing Transmit Request that this response frame
uses Frame ID of 0x47.
Frame Fields
Offset
Example
Start delimiter
0
0x7E
Length
MSB 1
0x00
LSB 2
0x07
Frame type
3
0x8B
