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INTRODUCTION

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19 ATCommandsforHSPA‐H5Modems

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Numericform Verboseform

11 CONNECT4800.

12 CONNECT9600.

15 CONNECT14400.

23 CONNECT1200/75.

CommandResponseTim e‐Out

Ifresponsecodesareenabled,whichisthedefaultsetting,theneverycommandissuedtothemodulereturnsa

resultresponse.

Thetimeneededtoprocessthegivencommandand returntheresponsevaries,dependingonthecommandtype.

CommandsthatdonotinteractwiththeSIMorthenetwork,and

onlyinvolveinternalsetupsorreadings,havean

immediateresponse.

CommandsthatinteractwiththeSIMorthenetworkcantakemanysecondstosendaresponse,dependingon:

 SIMconfiguration—forexample,numberofcontactsstoredinthephonebook,numberofstoredSMS.

 Thenetworkthecomma ndmayinteractwith.

CommandIssuingTiming

ThechainCommand‐>Responseisalwaysrespected.Youmaynotissueanewcommanduntilthemodule

finishessendingallofitsresponseresultcodes.

Thisappliesespeciallytoapplicationsthat“sense”theOKtextandthereforemaysendthenextcommandbefore

thecompletecode<CR><LF>OK<CR><LF>issentby

themodule.

Itisrecommendedtowaitforatleast20msbetweentheendofthereceptionoftheresponseand theissueofthe

nextATcommand.

Iftheresponsecodesaredisabled,andassuch,themoduledoes notreportresponsestothecommand,thenthe

20mspause

timeisrespected.

Duringcommandmode,duetohardwarelimitations,undersevereCPUloadtheserialportcanlosesome

charactersifplacedinautobaudingathighspeeds.Thereforeifyouencounterthisproblemfixthebaudratewith

+IPRcommand.Theflowcontrolincommandmodeisenabled.

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Multitech MTR-C2 Specifiche Pagina 19