XB24-BUIT-004 Digi International/Maxstream, XB24-BUIT-004 Datasheet - Page 45

• 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
4.5.2. Queried Sampling
4.5.3. Periodic IO Sampling
4.5.4. Digital IO Change Detection
The IS command can be sent to a device locally, or to a remote device using the API remote
command frame (see Chapter 8 for details). When the IS command is sent, the receiving device
samples all enabled digital IO and analog input channels and returns an IO sample. If IS is sent
locally, the IO sample is sent out the uart. If the IS command was received as a remote
command, the IO sample is sent over-the-air to the device that sent the IS command.
If the IS command is issued in AT firmware, the module returns a carriage return-delimited list
containing the above-listed fields. The API firmware returns an AT command response packet with
the IO data included in the command data portion of the response frame.
The following table shows an example of the fields in an IS reponse.
.
Table 4‐09.
Periodic sampling allows an XBee / XBee-PRO module to take an IO sample and transmit it to a
remote device at a periodic rate. The periodic sample rate is set by the IR command. If IR is set
to 0, periodic sampling is disabled. For all other values of IR, data will be sampled after IR
milliseconds have elapsed and transmitted to a remote device. The DH and DL commands
determine the destination address of the IO samples. DH and DL can be set to 0 to transmit to the
coordinator, or to the 64-bit address of the remote device (SH and SL). Only devices running API
firmware can send IO data samples out their Uart. Devices running AT firmware will discard
received IO data samples.
A sleepy end device will transmit periodic IO samples at the IR rate until the ST timer expires and
the device can resume sleeping. See section 5.3 for more information on sleep.
Modules can be configured to transmit a data sample immediately whenever a monitored digital IO
pin changes state. The IC command is a bitmask that can be used to set which digital IO lines
should be monitored for a state change. If one or more bits in IC is set, an IO sample will be
transmitted as soon as a state change is observed in one of the monitored digital IO lines. Figure
xx below shows how edge detection can work with periodic sampling.
0x01
0x0C0C
0x03
0x0408
0x03D0
0x0124
© 2008 Digi International, Inc.
Example
[1 sample set]
[Digital Inputs: DIO 2, 3, 10, 11 low]
[Analog Inputs: A/D 0, 1]
[Digital input states: DIO 3, 10 high, DIO 2, 11 low]
[Analog input ADIO 0= 0x3D0]
[Analog input ADIO 1=0x120]
Sample AT Response
44