Ht (Time Before Wake-Up Initializer) Command; Hv (Hardware Version) Command - Digi XTend User Manual

Rf module

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In order for modules to communicate with each other, the modules must have the same channel number since each

channel uses a different hopping sequence. Different channels can be used to prevent modules in one network from

listening to transmissions of another.

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)

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 initializer is sent by a TX (transmitting) RF module. The HT parameter should be set

shorter than inactivity 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 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 modules to remain awake

and receive the next transmission.

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)

<Diagnostics> The HV command is used to read the hardware version of the RF module.

AT Command: ATHV

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

Legacy Modem Minimum Firmware Version Required: v1.x80

XTend RF Module User Guide

Command descriptions

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