Description

This frame type is emitted when a network transmission request completes. The status field of this frame indicates whether the request succeeded or failed and the reason. This frame type provides additional networking details about the transmission.

This frame is only emitted if the Frame ID in the request is non-zero.

Broadcast transmissions are not acknowledged and always return a status of 0x00, even if the delivery failed.

Format

The following table provides the contents of the frame. For details on frame structure, see API frames.

Offset Size Frame Field Description

0

8-bit

Start Delimiter

Indicates the start of an API frame.

1

16-bit

Length

Number of bytes between the length and checksum.

3

8-bit

Frame type

Transmit Status - 0x8B

4

8-bit

Frame ID

Identifies the data frame for the host to correlate with a prior request.

5

16-bit

Reserved

Unused.

7

8-bit

Reserved

Unused.

8

8-bit

Delivery status

Complete list of delivery statuses:

0x00 = Success

0x03 = Message purged

0x74 = Message too long

9

8-bit

Reserved

Unused.

EOF

8-bit

Checksum

0xFF minus the 8-bit sum of bytes from offset 3 to this byte (between length and checksum).