XB24-BUIT-004 Digi International/Maxstream, XB24-BUIT-004 Datasheet - Page 50

• Manufacturer Part Number: XB24-BUIT-004
• Description: MODULE 802.15.4 SER 2 U.FL CONN
• Manufacturer: Digi International/Maxstream
• Series: XBee™r

Specifications of XB24-BUIT-004

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: Home/Building Automation, Industrial Control, ZigBee™
• Power - Output: 2 mW (3 dBm)
• Sensitivity: -96dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 38mA
• Current - Transmitting: 35mA
• Data Interface: PCB, Through Hole
• Antenna Connector: U.FL
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

XBee ZNet 2.5/XBee‐PRO ZNet 2.5 ZigBee OEM RF Modules v1.x4x
5.4. Commissioning Pushbutton and Associate LED
4
and sends received data packet out the
Source receives loopback transmission
Source Device
Demonstration of how the loopback cluster ID and data endpoint can be used to measure the link
5.3.2. RSSI Indicators
UART
AT Firmware
API Firmware
Figure 5‐019.Link Quality in a Mesh Network
The configuration steps to send data to the loopback cluster ID depend on the firmware type.
To send data to the loopback cluster ID on the data endpoint of a remote device, set the ZA
command to 1 and set the CI command value to 0x12. The SE and DE commands should be set to
0xE8 (default value). The DH and DL commands should be set to the address of the remote (0 for
the coordinator, or the 64-bit address of the remote). After exiting command mode, any received
serial characters will be transmitted to the remote device, and returned to the sender.
Send an Explicit Addressing ZigBee Command API frame (0x11) using 0x12 as the cluster ID and
0xE8 as the source and destination endpoint. Data packets received by the remote will be echoed
back to the sender.
It is possible to measure the received signal strength on a device using the DB command. DB
returns the RSSI value (measured in –dBm) of the last received packet. However, this number can
be misleading. The DB value only indicates the received signal strength of the last hop. If a
transmission spans multiple hops, the DB value provides no indication of the overall transmission
path, or the quality of the worst link – it only indicates the quality of the last link and should be
used sparingly.
The DB value can be determined in hardware using the RSSI/PWM module pin (pin 6). If the RSSI
PWM functionality is enabled (P0 command), when the module receives data, the RSSI PWM is set
to a value based on the RSSI of the received packet. (Again, this value only indicates the quality
of the last hop.) This pin could potentially be connected to an LED to indicate if the link is stable
or not.
The XBee modules support a set of commissioning and LED behaviors to aid in device deployment
and commissioning. These include the commissioning push button definitions and associate LED
behaviors. These features can be supported in hardware as shown below.
© 2008 Digi International, Inc.
1
(0x12) and data endpoint (0xE8) on a
Transmit data to the loopback cluster ID
quality in a mesh network
Mesh Network
remote device
Remote Device
2
The remote device receives data on
the loopback cluster ID and data
received packet back to the
3
Remote transmits the
endpoint
sender
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