User Manual
Table Of Contents
- 1. XBee®/XBee-PRO® RF Modules
- 2. RF Module Operation
- 3. RF Module Configuration
- Programming the RF Module
- Remote Configuration Commands
- Command Reference Tables
- Command Descriptions
- A1 (End Device Association) Command
- A2 (Coordinator Association) Command
- AC (Apply Changes) Command
- AI (Association Indication) Command
- AP (API Enable) Command
- AS (Active Scan) Command
- BD (Interface Data Rate) Command
- CA (CCA Threshold) Command
- CC (Command Sequence Character) Command
- CE (Coordinator Enable) Command
- CH (Channel) Command
- CN (Exit Command Mode) Command
- CT (Command Mode Timeout) Command
- D0 - D4 (DIOn Configuration) Commands
- D5 (DIO5 Configuration) Command
- D6 (DIO6 Configuration) Command
- D7 (DIO7 Configuration) Command
- D8 (DI8 Configuration) Command
- DA (Force Disassociation) Command
- DB (Received Signal Strength) Command
- DH (Destination Address High) Command
- DL (Destination Address Low) Command
- DN (Destination Node) Command
- DP (Disassociation Cyclic Sleep Period) Command
- EA (ACK Failures) Command
- EC (CCA Failures) Command
- ED (Energy Scan) Command
- EE (AES Encryption Enable) Command
- FP (Force Poll) Command
- FR (Software Reset) Command
- GT (Guard Times) Command
- HV (Hardware Version) Command
- IA (I/O Input Address) Command
- IC (DIO Change Detect) Command
- ID (Pan ID) Command
- IO (Digital Output Level) Command
- IR (Sample Rate) Command
- IS (Force Sample) Command
- IT (Samples before TX) Command
- IU (I/O Output Enable) Command
- KY (AES Encryption Key) Command
- M0 (PWM0 Output Level) Command
- M1 (PWM1 Output Level) Command
- MM (MAC Mode) Command
- MY (16-bit Source Address) Command
- NB (Parity) Command
- ND (Node Discover) Command
- NI (Node Identifier) Command
- NO (Node Discover Options) Command
- NT (Node Discover Time) Command
- P0 (PWM0 Configuration) Command
- P1 (PWM1 Configuration) Command
- PL (Power Level) Command
- PR (Pull-up Resistor) Command
- PT (PWM Output Timeout) Command
- RE (Restore Defaults) Command
- RN (Random Delay Slots) Command
- RO (Packetization Timeout) Command
- RP (RSSI PWM Timer) Command
- RR (XBee Retries) Command
- SC (Scan Channels) Command
- SD (Scan Duration) Command
- SH (Serial Number High) Command
- SL (Serial Number Low) Command
- SM (Sleep Mode) Command
- SO (Sleep Mode Command)
- SP (Cyclic Sleep Period) Command
- ST (Time before Sleep) Command
- T0 - T7 ((D0-D7) Output Timeout) Command
- VL (Firmware Version - Verbose)
- VR (Firmware Version) Command
- WR (Write) Command
- API Operation
- Appendix A: Agency Certifications
- Appendix B. Additional Information
XBee®/XBee‐PRO®RFModules‐802.15.4‐v1.xEx[2011.06.1]
©2011DigiInternatonal,Inc. 23
Modes of Operation
XBee®/XBee-PRO® RF Modules operate in five modes.
Figure2‐07. ModesofOperation
Idle Mode
When not receiving or transmitting data, the RF module is in Idle Mode. The module shifts into the
other modes of operation under the following conditions:
• Transmit Mode (Serial data is received in the DI Buffer)
• Receive Mode (Valid RF data is received through the antenna)
• Sleep Mode (Sleep Mode condition is met)
• Command Mode (Command Mode Sequence is issued)
Transmit/Receive Modes
RF Data Packets
Each transmitted data packet contains a Source Address and Destination Address field. The Source
Address matches the address of the transmitting module as specified by the MY (Source Address)
parameter (if MY >= 0xFFFE), the SH (Serial Number High) parameter or the SL (Serial Number
Low) parameter. The <Destination Address> field is created from the DH (Destination Address
High) and DL (Destination Address Low) parameter values. The Source Address and/or Destination
Address fields will either contain a 16-bit short or long 64-bit long address.
The RF data packet structure follows the 802.15.4 specification.
[Refer to the XBee/XBee-PRO Addressing section for more information]
Direct and Indirect Transmission
There are two methods to transmit data:
• Direct Transmission - data is transmitted immediately to the Destination Address
• Indirect Transmission - A packet is retained for a period of time and is only transmitted after
the destination module (Source Address = Destination Address) requests the data.
Indirect Transmissions can only occur on a Coordinator. Thus, if all nodes in a network are End
Devices, only Direct Transmissions will occur. Indirect Transmissions are useful to ensure packet
delivery to a sleeping node. The Coordinator currently is able to retain up to 2 indirect messages.