User's Manual

AT S Registers

This section lists the basic AT Command Set S registers. The S registers use the

following format: ATSr=n<CR> where “ r” is the S register number and “ n” is the value

or parameter to set it to. To read the current contents of an S Register, issue ATSr?<CR>

where “ r” is the register in question. The module will then display the value of the S

______________

S0 0-2 ASCII 0 This register serves several functions. The ATS0=1

automatically enter the always listening (ATA)

mode. If ATS0=1&W and the module is powered

Off/On or reset, the module will automatically enter

the always listening mode. The module will attempt

to connect using the current %M, %A, %F, %S and

S7 settings. For Auto Link operation ATS0=1 will

place the module in Answer mode and ATS0=2 will

place the module in Originate Mode. See Auto Link

section for More information. There is a 5 second

delay prior to entering this mode to allow you to exit

this mode or to enter other commands. The DTR

signal must be present for this feature to work (See

AT&Dn command). Any Key can also abort this

feature (See AT–An command) This command is

also used for setting up Master / Slave modules for

broadcast polling mode. (See Point to Multi-point

Operation for more information.

S2 0-127 ASCII 43 Escape Code Character

S3 0-127 ASCII 13 Command terminator (Carriage Return Character or

the Enter Key)

S4 0-127 ASCII 10 Line feed character

S5 0-127 ASCII 8 Back space character

S7 1-255 Seconds 30 Defines the amount of time the modules will wait to

complete the initial wireless data link before

returning to the command mode. If ATS7=255 and

ATA is issued the module will wait indefinitely to

detect an incoming signal from the remote

WHM900. (See AT&Dn and AT–An to exit always

listening mode.

S18 1-256 5 Link Recovery – In the event that a link has failed,

this register selects how many times the module will

attempt to re-establish an RF link. Each attempt to

recover the lost link will be approximately 10

seconds.