MC52i AT Command Set

MC52i AT Command Set
1.4 AT Command Syntax
1.4.2 Concatenating AT Commands
Concatenating AT commands on the same line is possible, though not recommended because of restrictions
listed below (for more details see [14]).
When concatenating AT commands you need to enter the "AT" or "at" prefix only once at the beginning of a command
line. Basic commands (i.e., V.250 commands) are concatenated without delimiter. Extended commands
(i.e., commands starting with AT+ or AT^) use a semicolon as delimiter.
Disadvantages and restrictions:
• There is no way to control the minimum time to wait between finishing an AT command and sending the next
one. Please refer to Section 1.5, Communication between Customer Application and MC52i for details about
timing.
• The sequence of processing the AT commands may be different from the sequential order of command input.
• Many AT commands cannot be concatenated (see list below). Concatenating these commands might end up
with an error result code, or leads to an unexpected order of responses.
AT command type
Comment
V.250 commands Cannot be concatenated with FAX commands (prefix
AT+F)
GSM 7.07 commands
Cannot be concatenated with extended commands
(prefix AT^S)
GSM 7.05 commands (SMS)
To be used standalone
Commands starting with AT&
To be used standalone
AT+IPR
To be used standalone
MC52i_ATC_V01.201 Page 19 of 551 4/16/10
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