AT Command Set - Olitec

ReferenceGSM 07.05Note• After invoking the commands CMGW, CMGS, CMGC wait for theprompt ">" and then start to send text to the module.• To send the message simply enter . See Execute commandfor possible responses.• Sending can be aborted by entering . Of course, the messagewill not be sent, though the operation is acknowledged withOK.• When sending e-mails via SMS check that, depending on the provider,the @ symbol will be recognized and correctly interpreted. Ifnot, make sure what character to use instead. A widely used alternativeis typing “*”.• At baudrates lower than 19200 it is recommended to use the linetermination character only (refer to +ATS3, default , pg. 30)before entering the text/pdu. Use of the line termination characterfollowed by the response formating character (see +ATS4, default, pg. 30) can cause problems.• All characters entered behind the “>” prompt will be recognized asGSM characters. For example, “Backspace” (ASCII character 8)does not delete a character, but will be inserted into the SMS asan additional physical character. As a result, the character youwanted to delete still appears in the text, plus the GSM codeequivalent of the Backspace key. See also Chapter 8.5 which providesthe supported alphabet tables.• In text mode, the maximum length of an SMS depends on theused coding scheme: It is 160 characters if the 7 bit GSM codingscheme is used, and 140 characters according to the 8 bit GSMcoding scheme.Page 142 of 207