23/12/2015 SMSTutorial:+CMSERRORFinalResultCodeSpecifictoSMSATCommands

http://www.developershome.com/sms/resultCodes2.asp#16.2.1.1 1/5

16.2.FinalResultCodeSpecifictoSMSATCommands

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ThefinalresultcodesOKandERRORareavailabletoallATcommands.UnlikeOKandERROR,the+CMSERRORfinalresultcodeisonlyavailabletoSMSATcommands.Itnotifiesyouabouttheoccurrenceofamessageservicefailure.

16.2.1.The+CMSERRORFinalResultCodeNotifiestheOccurrencesandCausesofMessageServiceFailures

The+CMSERRORfinalresultcodeisreturnedwhenamessageservicefailureoccurs.Anerrorcodeisprovidedforprogrammerstocheckwhatcausesthemessageservicefailure.The+CMSERRORfinalresultcodeisspecifictoSMSATcommands,i.e.the+CMSERRORfinalresultcodewillonlybeoutputtedbyATcommandsthatareusedtoperformtasksrelatedtoSMSmessaging.BelowaretheSMSATcommandsthatmayoutputthefinalresultcode+CMSERROR:

+CMGC(commandnameintext:SendCommand)

+CMGD(commandnameintext:DeleteMessage)

+CMGL(commandnameintext:ListMessages)

+CMGR(commandnameintext:ReadMessage)

+CMGS(commandnameintext:SendingMessage)

+CMGW(commandnameintext:WriteMessagetoMemory)

+CMSS(commandnameintext:SendMessagefromStorage)

+CNMA(commandnameintext:NewMessageAcknowledgementtoME/TA)

+CNMI(commandnameintext:NewMessageIndicationstoTE)

+CPMS(commandnameintext:PreferredMessageStorage)

+CRES(commandnameintext:RestoreSettings)

+CSAS(commandnameintext:SaveSettings)

+CSMS(commandnameintext:SelectMessageService)

Thesyntaxofthe+CMSERRORfinalresultcodeis:

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+CMSERROR:error_code

JustasthefinalresultcodesOKandERROR,the+CMSERRORfinalresultcodealwaysstartsandendswithacarriagereturncharacterandalinefeedcharacter.error_codeisanintegerthatisassociatedtoacertainerror.Alistofsomeerrorcodesandtheirmeaningscanbefoundin"Tableof+CMSErrorCodesandTheirMeanings".

Asmentionedearlier,aftertheexecutionofacommandline,onlyonefinalresultcodeisreturned.Hence,whenanerroroccurs,youwillnotfindboth+CMSERRORandERRORinthecommandresponse.ForerrorsrelatedtoSMSmessaging,the+CMSERRORfinalresultcodeisreturned.ForothererrorssuchasinvalidcommandsyntaxandunsupportedATcommand,theERRORfinalresultcodeisreturnedasusual.

Belowshowssomecommoncausesof+CMSerrors:

ASIMcardisnotpresentintheGSM/GPRSmodemormobilephone.

TheSIMcardrequiresapassword(e.g.PIN,PIN2,PUKandPUK2)butyouhavenotenteredit.

AninvalidmemoryindexisassignedtoanATcommand.

ThememoryoftheGSM/GPRSmodem,mobilephoneorSIMcardforstoringSMSmessagesisfull.

TheSMSCaddressisunknownorincorrect.

Followingisanexamplethatdemonstratestheusageofthe+CMSERRORresultcode.Let'ssaythereisonlyoneSMStextmessagestoredonourNokia6021anditisstoredinthememorylocationatindex1.Ifweenterthecommandline"AT+CMGR=11"(itmeans"toreadtheSMSmessageatmemoryindex11"),Nokia6021willreturna+CMSerror:

AT+CMGR=11

+CMSERROR:321

Asmentionedearlier,whenaterminalprogramsuchasHyperTerminalofMicrosoftWindowsseesacarriagereturncharacter,itmovesthecursortothebeginningofthecurrentline.Whenitseesalinefeedcharacter,itmovesthecursortothesamepositiononthenextline.Hence,thecommandlineyouentered,togetherwiththeresponsereturned,willbedisplayedlikethisinaterminalprogramsuchasHyperTerminalofMicrosoftWindows:

AT+CMGR=11

+CMSERROR:321

Tofindoutthemeaningofthe+CMSerrorcode321,goto"Tableof+CMSErrorCodesandTheirMeanings".Fromthere,weknowthatthereadmessageoperationfailedbecauseaninvalidmemoryindexwasassignedtotheATcommand+CMGR.

Notethataftertheoccurrenceofa+CMSerror,theGSM/GPRSmodemormobilephonewillnotprocesstheremainingATcommandsinthecommandline.Thus,ifthecommandlinesenttoNokia6021is"AT+CMGR=11+CGMI"(+CGMIistheATcommandforretrievingthemanufacturernameoftheGSM/GPRSmodemormobilephone),youwillgetthefollowingresultinWindows'HyperTerminal:

AT+CMGR=11+CGMI

+CMSERROR:321

ButifthepositionsofthetwoATcommandsinthecommandlineareexchanged,Nokia6021willoutputtheresultoftheexecutionoftheATcommand+CGMIbeforeoutputtingthe+CMSERRORresultcode.BelowistheresultdisplayedinWindows'HyperTerminal:

23/12/2015 SMSTutorial:+CMSERRORFinalResultCodeSpecifictoSMSATCommands

http://www.developershome.com/sms/resultCodes2.asp#16.2.1.1 3/5

AT+CGMI+CMGR=11

Nokia

+CMSERROR:321

16.2.1.1.Tableof+CMSErrorCodesandTheirMeanings

Thefollowingtablelistssomeofthe+CMSerrorcodesandtheirmeanings.

+CMSerrorcode Meaning

300 Mobileequipment(ME)failure.Mobileequipmentreferstothemobiledevicethatcommunicateswiththewirelessnetwork.UsuallyitisamobilephoneorGSM/GPRSmodem.TheSIMcardisdefinedasaseparateentityandisnotpartofmobileequipment.

301 SMSserviceofmobileequipment(ME)isreserved.See+CMSerrorcode300forthemeaningofmobileequipment.

302 TheoperationtobedonebytheATcommandisnotallowed.

303 TheoperationtobedonebytheATcommandisnotsupported.

304 OneormoreparametervaluesassignedtotheATcommandareinvalid.(ForPDUmode)

305 OneormoreparametervaluesassignedtotheATcommandareinvalid.(ForTextmode)

310 ThereisnoSIMcard.

311 TheSIMcardrequiresaPINtooperate.TheATcommand+CPIN(commandnameintext:EnterPIN)canbeusedtosendthePINtotheSIMcard.

312 TheSIMcardrequiresaPHSIMPINtooperate.TheATcommand+CPIN(commandnameintext:EnterPIN)canbeusedtosendthePHSIMPINtotheSIMcard.

313 SIMcardfailure.

314 TheSIMcardisbusy.

23/12/2015 SMSTutorial:+CMSERRORFinalResultCodeSpecifictoSMSATCommands

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315 TheSIMcardiswrong.

316 TheSIMcardrequiresaPUKtooperate.TheATcommand+CPIN(commandnameintext:EnterPIN)canbeusedtosendthePUKtotheSIMcard.

320 Memory/messagestoragefailure.

321 Thememory/messagestorageindexassignedtotheATcommandisinvalid.

322 Thememory/messagestorageisoutofspace.

330 TheSMScenter(SMSC)addressisunknown.

331 Nonetworkserviceisavailable.

332 Networktimeoutoccurred.

340 ThereisnoneedtosendmessageacknowledgementbytheATcommand+CNMA(commandnameintext:NewMessageAcknowledgementtoME/TA).

500 Anunknownerroroccurred.

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TableofContentsContentsataGlance

1.IntroductiontoSMSMessaging2.WhatMakesSMSMessagingSoSuccessfulWorldwide?3.ExampleApplicationsofSMSMessaging4.WhatisanSMSCenter/SMSC?5.BasicConceptsofSMSTechnology6.IntraoperatorSMSMessages7.InteroperatorSMSMessages8.InternationalSMSMessages9.WhatisanSMSGateway?10.HowtoSendSMSMessagesfromaComputer/PC?11.HowtoReceiveSMSMessagesUsingaComputer/PC?12.IntroductiontoGSM/GPRSWirelessModems13.HowtoUseMicrosoftHyperTerminaltoSendATCommandstoaMobilePhoneorGSM/GPRSModem?14.IntroductiontoATCommands

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23/12/2015 SMSTutorial:+CMSERRORFinalResultCodeSpecifictoSMSATCommands

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15.GeneralSyntaxofExtendedATCommands16.ResultCodesofATCommands17.ATCommandOperations:Test,Set,ReadandExecution18.TestingtheCommunicationbetweenthePCandGSM/GPRSModemorMobilePhone19.CheckingiftheGSM/GPRSModemorMobilePhoneSupportstheUseofATCommandstoSend,ReceiveandReadSMSMessages20.OperatingMode:SMSTextModeandSMSPDUMode21.SettingorReadingtheServiceCenterAddress/SMSCAddress(AT+CSCA)22.PreferredMessageStorage(AT+CPMS)23.WritingSMSMessagestoMemory/MessageStorage(AT+CMGW)24.DeletingSMSMessagesfromMessageStorage(AT+CMGD)25.SendingSMSMessagesfromaComputer/PCUsingATCommands(AT+CMGS,AT+CMSS)26.ReadingSMSMessagesfromaMessageStorageAreaUsingATCommands(AT+CMGR,AT+CMGL)

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