Eddy Wireless EDW-ML8021 User manual

EDW-ML8021 GS GPRS odem User’s anual
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EDW-ML8021 GSMGPRSModemUser sManual
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EDW-ML8021 GS GPRS odem User’s anual
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Content
EDW-ML8021 GPRS Modem User sManual .............................................................................................. 1
1.Introduction.......................................................................................................................................3
2.Productconcept.................................................................................................................................3
3.Applicationinterface......................................................................................................................... 5
3.1Pindescription.............................................................................................................................. 5
3.2Operatingmodes......................................................................................................................... 5
3.3LEDindication............................................................................................................................ 6
3.3.1RedLedisthepower indicates........................................................................................... 6
3.3.2YellowLedistheRINGindicates...................................................................................... 6
3.3.3GreenLedistheWorkingstateindicates.......................................................................... 6
4.Mechanicaldimension...................................................................................................................... 7
5.ProductList........................................................................................................................................ 8

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1.Introduction
ThisdocumentdefinestheEDW-ML8021 module series and describesthe hardware interface ofthe
EDW-ML8021 module that connectstothecustomer application and the hardware interface.
Thisdocumentcan helpcustomer quicklyunderstandmoduleinterface specifications,electrical
andmechanicaldetails. Withthe helpofthis document,associatedapplicationnotesanduser
guide,customercanuse EDW-ML8021 moduletodesign andset upmobile applications
quickly.
2.Productconcept
TheEDW-ML8021 is aQuad-bandGSM/GPRS engine that worksatfrequencies
GSM850MHz, GSM900MHz, DCS 1800MHzandPCS1900MHz. TheEDW-ML8021 features
GPRS multi-slotclass 12andsupportstheGPRS coding schemes CS-1, CS-2,CS-3 andCS-4.
TheEDW-ML8021 is integrated withInternetservice protocols, whichare TCP/UDP, FTPandHTTP.
ExtendedATcommandshavebeendevelopedforcustomertousetheseInternetservice protocols
easily.
Table1Modulekeyfeatures
Feature
Implementation
Powersupply
Singlesupplyvoltage5.0V
–
12V
.
Frequencybands
●Quad
-
band: GSM850,GSM900,DCS1800, PCS1900.
●Themodulecansearchthesefrequencybandsautomatically
●ThefrequencybandscanbesetbyATcommand.
●ComplianttoGSM Phase2/2+
Tr
ansmittingpower
●Class4(2W)atGSM850andGSM900
●Class1(1W)atDCS1800 andPCS1900
GPRS connectivity
●GPRS multi
-
slotclass12 (default)
●GPRS multi-slotclass1~12(configurable)
●GPRS mobilestationclassB
Temperaturerange
●Normal
operation:
-
35°C~+80°C
●Restrictedoperation:-45°C~-35°Cand+80°C~+85°C1)
●Storagetemperature:-45°C~+90°C
DATAGPRS:
●GPRS datadownlink transfer:max. 85.6kbps
●GPRS datauplinktransfer:max.85.6kbps
●Codingscheme:CS-1,CS-2,CS-3and CS-4

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CSD:
●SupporttheprotocolsPAP(PasswordAuthentication Protocol)
usually usedforPPP connections
●Internetserviceprotocols TCP/UDP/FTP/HTTP/MMS
●SupportPacketSwitchedBroadcastControl Channel(PBCCH)
●CSDtransmissionrates: 2.4,4.8,9.6, 14.4kbpsnon-transparent
●UnstructuredSupplementaryServicesData(USSD)support
SMS
●MT,MO,CB,Text andPDU mode
●SMS storage:SIMcard
FAX
Group3Class1and Class 2
SIMinterface
PortSIMcard:1.8V, 3V,Protectedagain
stESDwithaTVSdiode
array.
Serialinterface
●Supportfrom4800 bpsto115200 bps,defaultautobaudrate
●SupportRS232
●EmbedstandardATcommand GSM07.05and07.07）
Phonebook
management
Supportphonebooktypes:SM,FD, LD, RC,ON,MC
SIM
ApplicationToolkit
SupportSATclass3, GSM11.14 Release99
Physicalcharacteristics
79*53*21mm
1)Whenthemoduleworksin this temperaturerange, thedeviationsfromtheGSM specification
mightoccur. Forexample, thefrequencyerrororthephaseerrorcouldincrease.
Table2Codingschemesand maximumnetdataratesoverairinterface
Codingscheme
1Timeslot
2Timeslot
4Timeslot
CS
-
1:
9.05kbps
18.1kbps
36.2kbps
CS
-
2:
13.4kbps
26.8kbps
53.6kbps
CS
-
3:
15.6kbps
31.2kbps
62.4kbps
CS
-
4:
21.4kbps
42.8kbps
85.6kbps

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3.Applicationinterface
3.1Pindescription
Table3Pin description
PIN
Name
1
,4,6,7,8,9
NC
2
TXD
3
RXD
5
GND
3.2Operatingmodes
Thetablebelow briefly summarizesthevariousoperatingmodesreferredtointhefollowing
chapters.
Table4Overviewofoperatingmodes
Mode
Function
Normal
operation
GSM/GPRS
SLEEP
Themodulewill automaticallygointoSLEEPmodeif
DTRissettohigh leveland thereisnointerrupt(such
asGPIOinterruptordataonserialport).
Inthis case,thecurrentconsumptionofmodulewill
reducetotheminimallevel.
DuringSLEEPmode,themodulecanstillreceive
pagingmessageandSMS fromthesystemnormally.
GSMIDLE
Softwareisactive. T
hemodulehasregisteredtothe
GSMnetwork,andthemoduleisreadytosend and
receive.
GSMTALK
GSMconnectionisgoing.Inthismode,thepower
consumptionisdecidedbytheconfiguration ofPower
ControlLevel(PCL),dynamicDTXcontrol and the

EDW-ML8021 GS GPRS odem User’s anual
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workingRF band.
GPRSIDLE
Themoduleisnot
registeredtoGPRS network. The
moduleis notreachablethrough GPRSchannel.
GPRS
STANDBY
ThemoduleisregisteredtoGPRSnetwork,butno
GPRS PDPcontextis active. TheSGSNknowsthe
RoutingAreawherethemoduleis locatedat.
GPRS
READY
ThePDP
context isactive,butnodatatransferis going
on.Themoduleis readytoreceiveorsendGPRS data.
TheSGSNknowsthecellwhere themoduleis located
at.
GPRSDATA
Thereis GPRSdatain transfer.Inthis mode, power
consumptionisdecidedbythePCL,workingRF band
and GPRS multi-slotconfiguration.
POWER
DOWN
Normalshutdownbysendingthe “AT+QPOWD=1”
command,using the
PWRKEY pin.Thepower managementASICdisconnectsthepower
supplyfromthebasebandpartofthemodule, andonlythepower supply
fortheRTCisremained.Softwareisnotactive. Theserialinterfacesare
notaccessible. Operating voltage(connectedtoVBAT)remainsapplied.
Minimum
functionality
mode(without
removing power
supply)
Usethe “AT+CFUN”commandcansetthemoduleto aminimum
functionalitymodewithoutremoving thepower supply.Inthiscase, the
RFpartofthemodulewill notworkortheSIMcardwill notbeaccessible,
orbothRF partandSIMcardwill beclosedall,buttheserialportis still
accessible. Thepowerconsumptioninthiscaseisverylow.
Note:Themoduleis settoautobaudratemode(AT+IPR=0)in default configuration.Intheauto
baudratemode,theURC “RDY”afterpoweringonisnotsenttohostcontroller.ATcommand
canbesenttothemodule2-3seconds afterthemoduleis poweredon.Hostcontrollershould
firstly sendan “AT”or “at”string in orderthatthemodulecandetectbaud rateofhost controller,
andit shouldsend thesecondorthethird “AT”or “at”stringuntilreceiving “OK”stringfrom
module.Ifyouneedtousingfixedbaud rate, Thenan “AT+IPR=x;&W”shouldbesentto
moduleand savetheconfigurationtoflashmemoryofmodule.After theseconfigurations,the
URC “RDY”wouldbereceivedfromtheSerialPortofmoduleeverytimewhenthemoduleis
poweredon. Refer toChapter “AT+IPR”inARcommandmanual.
3.3LEDindication
3.3.1RedLedisthepower indication.
3.3.2YellowLedistheRINGindication.
3.3.3GreenLedis theWorkingstateindication.
TheWorking stateofthisLED islistinthetable6.
Table6Workingstateindication

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state
ModuleFunction
Off
The
moduleisnotrunning(Power Off)
64msOn/800msOff
Themoduleisnotsynchronizedwithnetwork
64msOn/2000msOff
Themoduleissynchronizedwithnetwork
64msOn/600msOff
GPRS datatransferisongoing.
4.Mechanicaldimension

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5.ProductList
Name
Unit
Quantity
Describe
Picture
EDW-ML8021
Item
1
Module
Antenna
Item
1
StandardSupply
PowerAdapter
Item
1
DC5V2A
RS
-
232 Cable
Item
1
StandardSupply