GM862-GPS Software User Guide - SemiconductorStore.com

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GM862-GPS Software User Guide1vv0300729 Rev. 4 - 24/01/073.4.1.1 Enabling/Disabling the power saving function• send command AT+CFUN=where: is the power saving function mode, the supported values are:0 - minimum functionality, NON-CYCLIC SLEEP mode: in this mode, the AT interface is notaccessible.1 - mobile full functionality with power saving disabled (factory default)2 - disable TX4 - disable both TX and RX5 - mobile full functionality with power saving enabled• wait for response:Response Reason ActionOKThe power save is now activeERROR some error occurred Enable extended result codes(see par. 2.5.2.1), and retry.+CME ERROR: 4 operation not supported Check command syntax and value.TIP: The power saving function is disabled by default when the device starts up, in order toguarantee that even without the DTR line support it is possible to exchange commands withthe module; for this reason the power saving setting command shall be issued after everypower up.NOTE: The power saving for GSM part will not be activated if the GPS part is switched on.The DTR functionality is usable only when +CFUN=5 is selected.Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 54 of 111
GM862-GPS Software User Guide1vv0300729 Rev. 4 - 24/01/073.5 SMS handlingThe Telit GM862-GPS supports the Short Message Service, it is possible to store, delete, write, sendand receive a SMS, which is a short text message up to 160 characters long.3.5.1 SMS device setupBefore accessing the Short Message Service, the device has to be properly set up.3.5.1.1 Select SMS format typeThe GM862-GPS supports SMS in two different formats:• PDU• TextThe difference is that in the PDU mode the device returns and receives SMS encoded in the formatready to be sent to the network; in TEXT mode the device converts automatically the read PDU intotext and viceversa. By using TEXT mode the PDU data encoding knowledge is not needed andoperations are easier. For this reason, we will use the TEXT mode to explain how to operate withSMS. If you are familiar with PDU encoding then you can operate with PDU by selecting that formatand using appropriate command syntax.• Send command AT+CMGF=where: is the SMS format type:0 – PDU1 – Text• wait for response OKTIP: This setting is stored and remains until the device is turned off. Hence, there's no need toissue it more than one time. For TEXT mode use =1.For example:1- Let's assume you want to set TEXT format for the SMS:command:AT+CMGF=1response:OKReproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 55 of 111
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