Configuration and commands Network commands
XBee®-PRO 900HP/XSC RF Modules
211
HT (Time before Wake-up Initializer)
Sets or displays the time of inactivity (no serial or RF data is sent or received) before a transmitting
(TX)RF device sends a wake-up initializer. The main purpose of this command is to prevent devices
from sending the Long Header with every data packet. For more information on long headers, see LH
(Wakeup Initializer Timer).
For RX devices operating in Cyclic Sleep mode (SM = 4-8), set HT to be shorter than the ST command.
The TX device sends a wake-up initializer, which instructs all receiving (RX) devices to remain awake
to receive RF data.
From the perspective of the RX device: after HT time elapses and the inactivity timeout (ST command)
is met, the RX device goes into cyclic sleep. In cyclic sleep, the RX device wakes once per sleep interval
(SM command) to check for a wake-up initializer. When it detects a wake-up initializer, the device
stays awake to receive data. The wake-up initializer must be longer than the cyclic sleep interval to
ensure that sleeping devices detect incoming data.
When HT time elapses, the TX device knows it needs to send a wake-up initializer for all RX devices to
remain awake and receive the next transmission.
Binary command
0x03 (3 decimal)
Parameter range
0 - 0xFFFF [x 100 ms]
Default
0xFFFF (wake-up initializer will not be sent)
Bytes returned
2
ID (Network ID)
Sets or displays the Vendor Identification Number (VID) of the device. Devices must have matching
VIDs in order to communicate. If the device uses OEM network IDs, 0xFFFF uses the factory value.
Binary command
0x27 (39 decimal)
Parameter range
0x10 - 0x7FFFF (user-settable)
0x8000 - 0xFFFF (factory-set)
Default
N/A
MK (Address Mask)
Sets or read the device's Address Mask.
All RF data packets contain the Destination Address of the transmitting (TX) device. When a device
receives a packet, the TX device's Destination Address is logically combined bitwise (in other words,
joined with AND) with the Address Mask of the receiving (RX) device. The resulting value must match
To Next Page
Loading...
Need help?
General
