XT55 AT Command Set - Wireless Data Modules

XT55 AT Command Set2.8 AT+CFUNs2.8 AT+CFUN Set phone functionalityThe AT+CFUN command serves to control the functionality level of the ME. It can be used to reset the ME, tochoose one of the SLEEP modes or to return to full functionality.Intended for power saving, SLEEP mode reduces the functionality of the ME to a minimum and thus minimizesthe current consumption. SLEEP mode falls in two categories:• NON-CYCLIC SLEEP mode =0• and CYCLIC SLEEP modes, selectable as = 5, 6, 7, 8 or 9.NON-CYCLIC SLEEP mode permanently blocks the serial interface. The CYCLIC SLEEP mode, however, is adynamic process which alternatingly enables and disables the serial interface. The major benefit of all CYCLICSLEEP modes is that the serial interface remains accessible and that, in intermittent wake-up periods, characterscan be sent or received without terminating the selected mode. The best choice is using = 7, 8 or 9, sincein these modes XT55 automatically resumes power saving, after you have sent or received a short message ormade a call. =5 or 6 do not offer this feature to the same extent and are only supported for compatibilitywith earlier releases. In all CYCLIC SLEEP modes, you can enter =1 to permanently wake up XT55 andtake it back to full functionality. Please refer to Section 2.8.1, Wake up the ME from SLEEP mode for a summaryof all SLEEP modes and the different ways of waking up the module.For CYCLIC SLEEP mode (= 5, 6, 7, 8 or 9) both the ME and the application must be configured to usehardware flow control. This is necessary since the CTS signal is set/reset every time when the ME listens to apaging message from the base station. This is the way how the module indicates to the application when theUART is active. For detailed information on the timing of the CTS signal refer to [2]. The default setting of hardwareflow control is AT\Q0 which must be altered to AT\Q3. For use after restart you are advised to add it to theuser profile saved with AT&W.If both interfaces ASC0 and ASC1 are connected, hardware flow control must be set in either application.The AT+CFUN test command returns the values of the supported parameters.The AT+CFUN read command returns the current functionality value.The AT+CFUN write command can be used to reset the ME, to choose one of the SLEEP modes or to return tofull functionality.SyntaxTest CommandAT+CFUN=?Response(s)+CFUN: (list of supported s) , (list of supported s)OKRead CommandAT+CFUN?Response(s)+CFUN: OKWrite CommandAT+CFUN=[[, ]]Response(s)OKERROR+CME ERRORReference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge LastGSM 07.07 ! % % § § § ! ! !XT55_ATC_V03.03 Page 36 of 459 9/9/05Confidential / Released