User's Manual

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9XTend™ OEM RF Module - Product Manual v2.x6x

MD (RF Mode) Command

<Networking & Security> The MD command is

used to select/read the settings that enable the

Polling and Repeater Modes on the module.

Polling Mode - A ‘Polling Base’ is responsible for

polling remotes. A ‘Polling Remote’ requires a poll

in order to transmit.

Repeater Mode - A ‘Repeater’ re-sends RF data

unless the transmission is addressed to it or if the

transmission has already been detected. A

‘Repeater End Node’ handles repeated messages,

but will not repeat the message over-the-air.

Refer to the P

olling and Repeater Mode sections

of the ‘RF Communication Modes’ chapter for

more information.

MK (Address Mask) Command

<Networking & Security> The MK command is

used to set/read the Address Mask of a module.

All RF data packets contain the Destination

Address of the TX (transmitting) module. When a

packet is received, the TX module Destination

Address is logically "ANDed" (bitwise) with the

Address Mask of the RX (receiving) module. The

resulting value must match the Destination

Address or Address Mask of the RX module for the

packet to be received and sent out the RX mod-

ule's DO (Data Out) pin. If the "ANDed" value does not m

atch the Destination Address or Address

Mask of the RX module, the packet is discarded.

Sniffer Mode (when MK = 0): ACK requests are ignored and every RX (receive) frame is sent to

the UART, without regard for repeated frames.

All “0” values are treated as irrelevant values and ignored.

Refer to the ‘Addressing’ section [p45] for more information.

MT (Multi-transmit) Command

<Networking & Security> The MT command is

used to enabled multiple transmissions of RF data

packets. When Multi-transmit Mode is enabled

(MT > 0), packets do not request an ACK

(acknowledgement) from the receiving RF mod-

ule(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 retransmiss

ions. 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 trans-

mission event (when RN > 0).

NOTE: The actual number of forced transmissions is the parameter value plus one. For example, if

MT = 1, two transmissions of each packet will be sent.

AT Command: ATMD

Binary Command: 0x31 (49 decimal)

Parameter Range: 0 - 6

Parameter Configuration

Transparent Operation

(Repeate

r Base)

1 [reserved - not used]

[reserved - not used]

3Polling Base

4 Polling Remote

5 Repeater

6 Repeater End Node

Default Parameter Value: 0

Number of bytes returned: 1

Minimum Firmware Version Required: 2.x20

AT Command: ATMK

Binary Command: 0x12 (18 decimal)

Parameter Range:0 - 0xFFFF

Default Parameter Value: 0xFFFF (65535d)

Number of bytes returned: 2

Related Commands: DT (Destination Address),

HP (Hopping Channel), ID (Modem VID), MY

(Source Address)

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)