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9XTend™
OEM
RF
Module
–
Product
Manual
v1.2.4
©
2005
MaxStream,
Inc.
Confidential
&
Proprietary
26
MK (Address Mask) Command
<Networking & Security> MK Command is used
to set/read the “Address Mask”. All data packets
contain the Destination Address 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’s 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 (65535d)
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 (Modem VID), MY
(Source Address)
MT (Multi-Transmit) Command
<Networking & Security> MT packets do not
request an acknowledgement from the receiving
module(s). MT takes precedence over RR, so if
both MT and RR are non-zero, then MT+1
packets will be sent, with no ACK requests.
When a receiving module receives a packet with
remaining forced retransmissions, it calculates
the length of the packet and inhibits transmission
for the amount of time required for all
retransmissions. Thereafter, a random number of
delay slots are inserted between 0 and RN before transmission is allowed from the receiving
module(s). This prevents all listening modules from transmitting at once upon conclusion of a
multiple transmission event (when RN > 0).
AT Command: ATMT
Binary Command: 0x3D (61 decimal)
Parameter Range: 0 – 0xFF
Default Parameter Value: 0 (no forced
retransmissions)
Number of bytes returned: 1
Related Commands: Networking (DT, MK, MY,
RN, TT), Serial Interfacing (BR, PK, RB, RO), RF
Interfacing (FS)
Comment: Actual number of forced transmissions is the parameter value plus one. For example,
if MT=1, two transmissions of each packet will be sent.
MY (Source Address) Command
AT Command: ATMY
Binary Command: 0x2A (42 decimal)
Parameter Range: 0 – 0xFFFF
Default Parameter Value: 0xFFFF (Disabled –
DT (Destination Address) parameter serves as
both source and destination address.)
Number of bytes returned: 2
Related Commands: DT (Destination Address),
HP (Hopping Channel), ID (Modem VID), MK
(Address Mask)
<Networking & Security> Set/Read the source
address of the module.