Technical data

Technical Datasheet
&
User’s Manual
Narrowband multi-channel data radio modem
LinkWiser™-S400M Rev. 2.1
Cellution Inc.
#317, NKIC, 48-84 Honguen-1dong, Seodaemun-gu, Seoul, Korea Zip: 120-760
Enquiries: [e-mail]
/ [e-mail]
Voice: [phone] / Fax: [phone]
9
Please contact [e-mail]
for more details.
12. CONFIGURATION
This section describes the configuration and test commands supported by the radio module. In most
cases, once the configuration is set it will not need to be changed. Configuration is performed using a
serial terminal, or appropriate communication application.
All commands and command values accepted by the radio module are described in this section; any
entries other than those listed here results in an invalid command or argument error message.
The first step to configuring the Radio Module is to put it in Configuration Mode.
12-1 Entering Configuration Mode
A series of three consecutively typed characters, called an escape sequence, forces the radio module
to exit data transfer mode and enter the module configuration mode. While in Configuration Mode, you
can communicate directly with the radio module using a number of specific commands to configure
and test the radio module.
The escape sequence is factory set to ‘+++’ (No carriage return key is followed). A pause length of
which is called the escape guard time (about 1s) must be completed both before and after when
escape sequence is entered. These three '+' characters must not be sent as one continued frame. The
delay between 2 characters must be between 10ms~1s for the (‘+++’) sequence. This prevents the
radio module from interpreting the escape sequence as data and the vice versa. The guard time must
also be met when the Radio Module is initially powered up.
Configuration changes are stored permanently in non-volatile memory within the Radio Module.
Exiting Configuration Mode and returning back to data transfer mode is accomplished by typing “ATO”
at the command prompt. This will force a soft reset of the Radio Module resulting in any configuration
changes taking effect.
12-1-1 Command Format
LinkWiser™ module’s parameters are set through the use of AT type commands sent on the serial link.
'AT' commands complies with Hayes protocol used in PSTN module standards. This ‘AT’ protocol is
used to configure the module parameters, based on the following principles:
A data frame always begins with the two ASCII ’AT’ characters, standing for ‘ATtention’, Commands
are coded over one or several characters and may include additional data.
A given command always ends up with a < CR> Carriage Return.
AT COMMAND ADDITIONAL DATA <CR>
Note: The delay between 2 characters of the same command must be less than 30 seconds.
All alphabetical characters typed in configuration command mode are converted to upper case before
being interpreted by the configurator. Thus commands can be typed using either upper or lower case.
Despite its similarity to standard telecommunication module, it remains a radio link module and is
consequently fitted with some particular and specific ‘AT’ commands proper to radio transmission (I.e.
communication channel, radio rate...).
12-1-2 Configuration Commands in details
+++
Configuration
mode Command
Configuration Mode Activation ‘+++’ Command gives an instant access to the
module’s parameters configuration mode (AT mode). ‘+++’ Command should
be entered one by one. The time between two ‘+’ must be between 10ms ~1s.
Answer: > Description