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XT55 AT Command Set - Wireless Data Modules

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<strong>XT55</strong> <strong>AT</strong> <strong>Command</strong> <strong>Set</strong>13.7 <strong>AT</strong>+CMGSs• Message Length in Text ModeThe maximum length of a short message depends on the used coding scheme: It is 160 characters if the 7bit GSM coding scheme is used, and 140 characters according to the 8 bit GSM coding scheme.In case UCS2 character set selected it is highly recommended to set <strong>Data</strong> Coding Scheme ( of<strong>AT</strong>+CSMP) to 16-bit data, otherwise the length of sms user data is restricted to 88 octets. Even better for messageswith UCS2 character set is the PDU Mode.• At baudrates lower than 19200 it is recommended to use the line termination character only (refer to of<strong>AT</strong>S3, default ) before entering text or PDU. Use of the line termination character followed by theresponse formatting character (see of <strong>AT</strong>S4, default ) can cause problems.<strong>XT55</strong>_<strong>AT</strong>C_V03.03 Page 328 of 459 9/9/05Confidential / Released

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