Digi XBee SX User Manual

Operate in API mode API frames
XBee®/XBee-PRO SX RF Module User Guide
139
Legacy RX Indicator frame - 0x80
Description
When a device in Legacy Packet Mode (AO = 2) receives an RF data packet, it sends this frame out the
serial interface.
Format
The following table provides the contents of the frame. For details on frame structure, see API frame
specifications.
Frame
data
fields Offset Description
Frame
type
3 0x80
64-bit
source
address
4-11
The sender's 64-bit address. MSB first, LSB last.
RSSI
12
Received Signal Strength Indicator of the last hop. The Hexadecimal equivalent
of (-dBm) value. For example if RX signal strength is -40 dBm, then 0x28 (40
decimal) is returned.
Options
13
Bit field:
bit 0: Packet was acknowledged
bit 1: Broadcasted packet
bits 6,7:
b’01 - Point-Multipoint
b’10 - Repeater mode (directed broadcast)
b’11 - DigiMesh
Ignore all other bits.
Received
data
14-n Received RFdata
Example
In the following example, a device with a 64-bit address of 0x0013A200 4052C507 sends a unicast
data transmission to a remote device with payload RxData. If AO = 2 on the receiving device, it sends
the following frame out its serial interface.
Frame data fields Offset Example
Start delimiter 0 0x7E

Digi XBee SX Specifications

General

Brand	Digi
Model	XBee SX
Category	Control Unit
Language	English