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4. Comparative AT Command Reference
4.1. Introduction
This chapter compares the AT commands available on the DART 300 with those of the original
DART 200. This is not intended as a complete reference to the AT Command behaviour, but
instead identifies the differences in behaviour of commands and offers suggested alternatives
where the new DART 300 does not support the same functionality as the original DART 200.
There is also a cross reference for commands that exist on the DART 300 but not on the
DART 200. These allow users familiar with the DART 200 to better understand command syntax
from the DART 300 by finding the roughly equivalent DART 200 commands.
The phrase “Not supported” indicates that the command syntax is not directly supported. The
functionality may be provided by a different mechanism, which will be described in the table. If
no explanatory text is provided, then there is not an equivalent function available.
4.2. AT Command Set
The following tables list the commands grouped by their prefix.
AT
is assumed at the beginning
of all commands except where specified. A space following the “
AT
” is optional.
Table 4-1 Basic AT Commands
Command DART 200 DART 300
+++
Time Dependent Escape Sequence (TDES)
Uses a sequence of EGEGE where the guard
time between successive characters must meet
or exceed the time set in
S12
.
Time Dependent Escape Sequence (TDES)
Uses a sequence of GEEEG. That is: a
preceding and trailing guard time with the time
between successive escape characters less than
the guard time.
AT+++
Not Supported. Time Independent Escape Sequence (TIES).
Offered only in TCP or UDP mode.
<0xC0>
+++
<0xC0>
Not Supported.
Escape sequence (SLIP service)
Not preceded by AT. There are no guard
times associated with this escape sequence.
A/
Repeat Last Command
Not preceded by AT. Re-executes the last AT
command string entered (buffered).
Repeat Last Command
Same behaviour.
A
Answer – Manual
Behaviour and result codes discussed in the
DART 200 reference.
Answer – Manual
Similar behaviour in practice but details are
different from the DART 200. Result codes
are also interpreted differently. Consult the
respective product references for details.
