XT09-MI【PDF 28/71 页】MODULE RF 900MHZ 1W 115K W/MMCX

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9XTend? ? OEM ? RF ? Module ?‐? Product ? Manual ? v2.x4x ? [2007.01.04]

HP (Hopping Channel) Command

<Networking & Security> The HP command is

used to set/read the RF module's hopping channel

number. A channel is one of three layers of filtra-

tion available to the module.

In order for modules to communicate with each

other, the modules must have the same channel

number since each channel uses a different hop-

ping sequence. Different channels can be used to

prevent modules in one network from listening to

transmissions of another.

HT (Time before Wake-up Initializer) Command

<Sleep (Low Power)> The HT command is used

to set/read the time of inactivity (no serial or RF

data is sent or received) before a wake-up initial-

izer is sent by a TX (transmitting) RF module. The

HT parameter should be set shorter than inactiv-

ity timeout [ST Command] time of any RX

(receiving) modules operating in Cyclic Sleep

(SM=4-8). The wake-up initializer sent by the TX

module instructs all RX modules to remain awake

to receive RF data.

From the RX module perspective: After HT time

Chapter ? 3 ?‐? RF ? Module ? Configuration

AT Command: ATHP

Binary Command: 0x11 (17 decimal)

Parameter Range: 0 - 9

Default Parameter Value: 0

Number of bytes returned: 1

Related Commands: ID (Modem VID), DT

(Destination Address), MK (Address Mask)

AT Command: ATHT

Binary Command: 0x03 (3 decimal)

Parameter Range: 0 - 0xFFFF

[x 100 milliseconds]

Default Parameter Value: 0xFFFF (wake-up

initializer will not be sent)

Number of bytes returned: 2

Related Commands: LH (Wake-up Initializer

Timer), SM (Sleep Mode), ST (Time before

Sleep)

elapses and the inactivity timeout [ST Command]

is met, the RX module goes into cyclic sleep. In cyclic sleep, the RX module wakes once per sleep

interval [SM Command] to check for a wake-up initializer. When a wake-up initializer is detected,

the module stays awake to receive data. The wake-up initializer must be longer than the cyclic

sleep interval to ensure that sleeping modules detect incoming data.

When HT time elapses, the TX module knows it needs to send a wake-up Initializer for all RX mod-

ules to remain awake and receive the next transmission.

HV (Hardware Version) Command

<Diagnostics> The HV command is used to read

the hardware version of the RF module.

AT Command: ATHV

Parameter Range: 0 - 0xFFFF [Read-only]

Minimum Firmware Version Required: v1.x80

ID (Modem VID) Command

<Networking & Security> The ID command is

used to set/read the VID (Vendor Identification

Number) of the RF module. RF modules must

have matching VIDs in order to communicate.

? ? 2007 ? MaxStream, ? Inc.

AT Command: ATID

Binary Command: 0x27 (39 decimal)

Parameter Range:

0x11 - 0x7FFF (user-settable)

0 - 0x10 & 0x8000 - 0xFFFF (factory-set)

Default Parameter Value: 0x3332 (13106d)

Number of bytes returned: 2

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