XIB-R【PDF 26/36 页】BOARD INTERFACE RS232/485

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MK (Address Mask) Command

<AT Command: Networking> MK Command is used to set the radio modem address mask. All RF

packets contain the Destination Address of the transmitting radio modem. When an RF 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 receiving modem 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 ignored.)

AT Command: MK

Parameter Range: 0 - 0xFFFF

# of bytes returned: 2

Default Parameter Value: 0xFFFF (When set to this value, the Destination Address of the trans-

mitter must exactly match the Destination Address of the receiver.)

Related Commands: DT (Destination Address), HP (Channel)

NB (Parity) Parameter

<Non-AT Settable Parameter: Serial Interfacing>

NB Parameter allows parity for the modem to be

changed. Parity is an error detection method in

which a bit (0 or 1) is added to each group of bits

so that it will have either an odd number of 1's or

an even number of 1's. For example, if parity is

odd, then any group of bits that arrives with an

even number of 1's must contain an error.

PW (Pin Wake-up) Parameter

<Non-AT Settable Parameter: Sleep (Low

Power)> Under normal operation, a radio modem

in Cyclic Sleep Mode cycles from an active state to

a low-power state at regular intervals until data is

ready to be received. If PW Parameter is set to 1,

the SLEEP Pin (Pin 2 of the embedded OEM RF

Module) can be used to awaken the modem from

Cyclic Sleep. If the SLEEP Pin is de-asserted

(low), the radio modem will be fully operational

and will not go into Cyclic Sleep. Once SLEEP is asserted, the radio modem will remain active for

the period of time specified by ST (Time before Sleep) Command, and will return to Cyclic Sleep

Mode (if no data is ready to be transmitted). PW Command is only valid if Cyclic Sleep has been

enabled using SM Command.

RE (Restore Defaults) Command

<AT Command: AT Command Options> RE Command restores all AT-settable parameters to fac-

tory default settings. However, RE Command will not write the default values to non-volatile mem-

ory. Unless the WR (Write) Command is issued after the RE Command, the default settings will not

be saved in the event of radio modem reset or power-down.

AT Command: RE

Related Command: WR (Write)

Parameter Ranges: 0 - 4

Parameter

Configuration

8-bit (no parity) or 7-

bit (with any parity)

8-bit even parity

8-bit odd parity

8-bit mark parity

8-bit space parity

Default Parameter Value: 0

Number of bytes returned: 1

Parameter Ranges: 0 - 1

Parameter

Configuration

disabled

enabled

Default Parameter Value: 0

Number of bytes returned: 1

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