XStream™
OEM
RF
Module
–
Product
Manual
v5.x00
[2006.02.24]
LH (Wake-up Initializer Timer) Command
AT Command: ATLH
Binary Command: 0x0C (12 decimal)
<Sleep (Low Power)> Set/Read the amount of
time during which the RF initializer is sent. When
receiving modules are put into Cyclic Sleep Mode,
they power-down after a period of inactivity
[specified by ST (Time before Sleep) Command]
and will periodically awaken and listen for
transmitted data. In order for the receiving
modules to remain awake, they must detect
~35ms of the wake-up initializer.
Parameter Range: 0 – 0xFF
[x
100
milliseconds]
Default Parameter Value: 1
Number of bytes returned: 1
Related Commands: HT (Time before Wake-up
Initializer), SM (Sleep Mode), ST (Time before
Sleep)
LH Command must be used whenever a receiver is operating in Cyclic Sleep Mode. This lengthens
the Wake-up Initializer to a specific amount of time (in tenths of a second). The Wake-up
Initializer Time must be longer than the cyclic sleep time that is determined by SM (Sleep Mode)
Command. If the wake-up initializer time were less than the Cyclic Sleep interval, the connection
would be at risk of missing the wake-up initializer transmission.
Refer to the figures in the Sleep Mode sections [p13] to view correct and incorrect configuration
diagrams. The images help visualize the importance that the LH value be greater than the SM cyclic
sleep value.
MD (RF Mode) Command
AT Command: ATMD
Binary Command: 0x32 (50 decimal)
Parameter Range: 0 – 4
Parameter
Configuration
0
Peer-to-Peer
(transparent operation)
1
Multi-Stream
Base
2 Multi-Stream
Remote
3
Repeater & End Node
4
End
Node
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands: CB (Connection Duration
Timeout), CE (Connection Inactivity Timeout),
CM (Connection Message), DC (Disconnect)
Minimum Firmware Version Required: 4.30
<Networking & Security> The MD command is
used to select/read the RF Mode (Peer-to-peer,
Multi-Stream or Repeater Modes) of the module.
Multi-Streaming Mode enables exclusive
connections in point-to-multipoint networks.
Refer to the Multi-Streaming Mode section [p43]
for more information regarding how these
parameter values affect other parameter values.
Repeater Mode enables longer range via an
intermediary module. When MD=3, the module
will act as a “store and forward” repeater. Any
packets not addressed to this node will be
repeated. A Repeater End Node (MD=4) handles
repeated messages, but will not forward the data
over-the-air. Refer to the Repeater Mode section
[p38] for more information.
MK (Address Mask) Command
©
2006
MaxStream,
Inc.
Confidential
and
Proprietary
27
<Networking & Security> MK Command is used
to set/read the address mask of the module.
All data packets contain the destination address
(DT Parameter) of the transmitting module.
When an RF data packet is received, the
transmitter’s destination address is logically
“ANDed” (bitwise) with the Address Mask of the
receiver. The resulting value must match the
destination address or the address mask of the
receiver for the packet to be received and sent
out the module DO serial port. If the “ANDed”
value does not match either the destination address or the address mask of the receiver, the
packet is discarded. (All “0” values are treated as “irrelevant” values and are ignored.)
AT Command: ATMK
Binary Command: 0x12 (18 decimal)
Parameter Range: 0 – 0xFFFF
Default Parameter Value: 0xFFFF
(Destination address (DT parameter) of the
transmitting module must exactly match the
destination address of the receiving module.)
Number of bytes returned: 2
Related Commands: DT (Destination Address),
HP (Hopping Channel), ID (Module VID), MY
(Source Address)
Refer to the Addressing Options section [p36] for more information.
electronic components distributor
