AT Commands Manual - Teltonika

AT CommandsUser ManualIf the command parameters are optional, they can be also left out in the command line. In such casesnormal default values are assumed as follows: in case of integer type parameters, the default value is 0, exceptthe cases specified for each concerned command; in case of text parameters, the default value is an empty string,except the cases specified for each concerned command.2.4 Information responses and result codesInformation responses start and end with when V1 is enabled and with when V0 isenabled. If the command syntax is wrong CME ERROR: unknown is sent. If the parameters are wrong +CMEERROR: or +CMS ERROR: is sent. gives hints to the kind of the error. If no SIMcardis present or the PIN was not correctly entered, +CME ERROR: is sent for the most commands.If the command line could be performed successfully, the string OK is sent. In the following description are intentionally omitted.3 General behaviors3.1 Start up and initializationA complete start up can take place only with a SIM-card with disabled PIN-check. For a SIM-card withenabled PINM check the most commands are answered with +CME ERROR: SIM-PIN requested. Afterentering PIN via +CPIN command, which allows a start up completion, a lot of SIM-files will be read; it ispossible that some commands are affected for a few seconds. The serial interface driver does not allow a newcommand, until the old one is terminated by OK or +CME ERROR: . If at start up the MS detectsinconsistencies related to the NVRAM the following message is displayed: “! NVR DOES NOT FIT TO SW-VERSION. NVR-update is needed!”8