Description
The XBee Wi-Sun device uses this frame when it receives RF data on the specified socket. This frame is sent only for UDP sockets that have not used a Socket Connect - 0x42 to connect, providing addressing information about the source.
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 |
0xCB |
4 |
8-bit |
Reserved |
Reserved, should always be 0. |
5 |
8-bit |
Socket ID |
ID of the UDP listening socket on which data was received. |
6 |
128-bit |
Source IPv6 Address |
Specifies the IPv6 address of the sending device |
22 |
16-bit |
Source port |
Specifies the port used on the sending device. |
24 |
8-bit |
Reserved |
Reserved, should always be 0. |
25 |
variable |
Payload |
Data received. |
EOF |
8-bit |
Checksum |
0xFF minus the 8-bit sum of bytes from offset 3 to this byte (between length and checksum). |
