Hi-Link HLK-RM04 User manual

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Hi-Link(HK)co.,Ltd
HLK-RM04 UserManual
ETHERNET
WIFI
Full FunctionSerialNetwork/Wireless Module
1BRIEFINTRODUCTION....................................................................................................................................5
2SUMMARIZE.......................................................................................................................................................5

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2.1 TECHNICAL SPECIFICATIONS............................................................................................................................5
2.2 HARDWARE EXPLANATION ..............................................................................................................................6
2.2.1 MechanicalDimensions........................................................................................................................6
3QUICKSTART.....................................................................................................................................................8
3.1 RESTOREFACTORYSETTINGS...........................................................................................................................8
3.2 CONFIGURATENETWORKPARAMETER ..............................................................................................................8
3.3 CONFIGURATESERIALNETWORKPARAMETER...................................................................................................9
4FUNCTIONDESCRIPTION...............................................................................................................................9
4.1 SERIALTO ETHERNET......................................................................................................................................9
4.2 SERIALTO WIFI CLIENT..............................................................................................................................10
4.3 SERIALTO WIFIAP......................................................................................................................................10
4.4 DEFAULTMODE.............................................................................................................................................11
4.5 SERIALWORKMODESWITCHING....................................................................................................................11
4.6 SERIAL-NET DATACONVERSION .....................................................................................................................13
4.7PARAMETERCONFIGURATIONDIRECTION............................................................................................15
5WEBCONFIGURATION..................................................................................................................................15
5.1 WEBNETWORKCONFIGURATION...................................................................................................................16
5.1.1 SerialtoEthernet-dynamicip..............................................................................................................17
5.1.2 SerialtoEthernet-staticip...................................................................................................................17
5.1.3 SerialtoWIFICLIENT-dynamicip......................................................................................................17
5.1.4 SerialtoWIFICLIENT-staticip...........................................................................................................18
5.1.5 SerialtoWIFIAP................................................................................................................................18
5.2 WEBSERIALCONFIGURATION .......................................................................................................................18
5.3 SUBMITTING ALTERATION .............................................................................................................................20
6SERIALATCOMMANDCONFIGURATION..................................................................................................20
6.1 ACCESS TOAT COMMANDMODE....................................................................................................................20
6.2 AT COMMAND ..............................................................................................................................................20
6.2.1 Netmode.............................................................................................................................................22
6.2.2 wifi_conf.............................................................................................................................................22
6.2.3 Channel..............................................................................................................................................23
6.2.4 dhcpc..................................................................................................................................................23
6.2.5 net_ip..................................................................................................................................................23

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6.2.6 net_dns...............................................................................................................................................24
6.2.7 dhcpd..................................................................................................................................................24
6.2.8 dhcpd_ip.............................................................................................................................................24
6.2.9 dhcpd_dns...........................................................................................................................................25
6.2.10 dhcpd_time..........................................................................................................................................25
6.2.11 net_commit..........................................................................................................................................25
6.2.12 out_trans.............................................................................................................................................26
6.2.13 remoteip..............................................................................................................................................26
6.2.14 remoteport..........................................................................................................................................26
6.2.15 remotepro............................................................................................................................................26
6.2.16 timeout................................................................................................................................................27
6.2.17 mode...................................................................................................................................................27
6.2.18 uart.....................................................................................................................................................27
6.2.19 uartpacklen.........................................................................................................................................28
6.2.20 uartpacktimeout..................................................................................................................................28
6.2.21 escape................................................................................................................................................28
6.2.22 tcp_auto............................................................................................................................................28
6.2.23 save....................................................................................................................................................29
6.2.24 reconn.................................................................................................................................................29
6.2.25 ver......................................................................................................................................................29
6.2.26 lport....................................................................................................................................................29
6.2.27 RTS.....................................................................................................................................................30
6.2.28 XON_XOFF........................................................................................................................................30
6.2.29 net_wanip...........................................................................................................................................30
6.2.30 tcp_client_check..................................................................................................................................31
6.2.31 S2N_Stat.............................................................................................................................................31
6.2.32 Get_MAC............................................................................................................................................31
6.2.33 wifi_ConState......................................................................................................................................31
6.2.34 wifi_Scan............................................................................................................................................32
6.2.35 suspend...............................................................................................................................................32
6.2.36 C2_remoteip........................................................................................................................................32
6.2.37 C2_remoteport....................................................................................................................................32
6.2.38 C2_remotepro.....................................................................................................................................33
6.2.39 C2_timeout..........................................................................................................................................33
6.2.40 C2_mode.............................................................................................................................................33

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6.2.41 C2_uart...............................................................................................................................................34
6.2.42 C2_uartpacklen...................................................................................................................................34
6.2.43 C2_uartpacktimeout............................................................................................................................34
6.2.44 C2_tcp_auto......................................................................................................................................34
6.2.45 C2_tcp_client_check...........................................................................................................................35
6.3 AT COMMANDCONTROLCODEROUTION ........................................................................................................35
6.3.1 Inquiryconfigurationinformation........................................................................................................35
6.3.2 SerialtoEthernet(Dynamicipaddress)................................................................................................36
6.3.3 SerialtoEthernet(staticipaddress).....................................................................................................37
6.3.4 Serialtowifi client(dynamicIPaddress)..............................................................................................38
6.3.5 Serialtowifi client(staticIPaddress)..................................................................................................39
6.3.6 Serialtowifi AP..................................................................................................................................40
6.3.7 Restorefactoryvalue...........................................................................................................................41
7SERIALCONFIGURATIONTOOLS...............................................................................................................41
7.1 SEARCHINGTHE MODULE..............................................................................................................................43
7.2 SET EACH PARAMETERS.................................................................................................................................43
7.3 SUBMITTHECONFIGURATION.........................................................................................................................44
7.4 USER DATA RETENTION.................................................................................................................................45
7.5 INQUIRYCONFIGURATION ..............................................................................................................................45
7.6 ACCESS TOTRANSPARENTTRANSMISSIONMODE.............................................................................................45
7.7 RESTOREFACTORYFACTORYVALUESETTING..................................................................................................45
8DEVICESEARCHTOOLS..................................................................................................................................46
9RESTOREFACTORYSETTINGS...................................................................................................................47
10 FIRMWAREUPGRADE....................................................................................................................................48
APPENDIX ADOCUMENTREVISIONRECORD...............................................................................................48

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1BriefIntroduction
HLK-RM04 isanewlow-costembeddedUART-ETH-WIFImodule(serialport-Ethernet-
Wirelessnetwork)developedbyShenzhenHi-Link(HK)co.,Ltd
Thisproductisanembeddedmodulebasedontheuniversalserialinterface networkstandard,
built-inTCP/IPprotocolstack,enabling theuserserialport,Ethernet,wirelessnetwork(wifi)
interface betweentheconversions.
ThroughtheHLK-RM04 module,thetraditionalserialdevicesdonotneedtochangeany
configuration;datacanbetransmittedthroughtheInternetnetwork.Provideaquicksolutionfor
theuser sserialdevicestotransferdataviaEthernet.
Picture1.F-structure
2Summarize
2.1 TechnicalSpecifications
Table2-1TechnicalSpecifications
wireless IEEE802.11n、IEEE 802.11g、IEEE802.11b
Networkstandard wired IEEE802.3、IEEE802.3u
Wireless transmissionrate
11n:maximumupto150Mbps
11g:maximumupto54Mbps
11b:maximumupto11Mbps
Tracksnumber 1-14
Frequencyrange 2.4-2.4835G
Emissionpower 12-15DBM
Interface 2Ethernet,2serial,1usb （host/slave）,GPIO
Antenna
Antennatype Onboardantenna/ExternalAntenna
Ethernet
WIFI
（
C
lient/AP
）
S
erialCom

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FunctionalParameters
WIFIworkmode Client/AP/Router
WDS Function SupportWDS wireless bridgeconnection
Wireless MACaddress filtering
Wirelesssecurityfunctionswitch
64/128/152bit WEPencryption
Wireless security
WPA-PSK/WPA2-PSK、WPA/WPA2securitymechanism
RemoteWebmanagement
Configurationfileimportandexport
Networkmanagement
WEBsoftwareupgrade
SerialtoEthernet
Maximumtransmission
rate 230400bps
TCPconnection Max connectionnumber>20
UDPconnection Max connectionnumber>20
Serialbaud rate 50~230400bps
OtherParameters
Statusindicator Statusindicator
Operatingtemperature -20-70℃
Operatinghumidity 10%-90%RH（noncondensing）
Storagetemperature -40-80℃
Environmentalstandard
Storagehumidity 5%-90%RH（noncondensing）
Additionalproperties Frequencybandwidthoptional 20MHz、40MHz，Automatic
2.2 HardwareExplanation
2.2.1 Mechanical Dimensions
HLK-RM04 Mechanical Dimensionsisshowninthefollowing picture

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Picture2.DimensionsUnit:mm
2.2.2PinsandInterface
ThePinofthisproductasshownaboveisdefinedasfollows
Table2-2modulepininterface
No. Function Direction Explaination
1 VCC5V A SupplyVoltage, 5V+/-10%
2 GND GND AnalogueGround
3 WIFILED O WLAN ActivityLED
4 VO3.3 I 3.3VOutput(SuuportAtmost300mA)
5 LINK1 I/O 10/100PHYPort#1activityLED
6 N/AReserved
7 N/AReserved
8 GPIO0GeneralGPIOReserved
9 GPIO1GeneralGPIOReserved
10 ES/RST I/OExittransparenttransmissionmode/Restore
factory

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11 TXOP1I/O10/100PHYPort#1TXP
12 TXON1I/O10/100PHYPort#1TXN
13 RXIP2I/O10/100PHYPort#2TXP
14 RXIN2I/O10/100PHYPort#2TXN
15 RXIN1I/O10/100PHYPort#1RXN
16 RXIP1I/O10/100PHYPort#1RXP
17 TXON2I/O10/100PHYPort#2OXN
18 TXOP2I/O10/100PHYPort#2OXP
19 GPIO2I GeneralGPIOReserved
20 UART_RXI UARTRXD.
21 UART_TXO UARTTXD.
22 GPIO3I GeneralGPIOReserved
23 LINK2I/O 10/100PHYPort#2activityLED
24 GPIO4O GeneralGPIOReserved
25 WPS/RSTI WiFiProtectedSetup /Restorefactoryvalue
26 GPIO5O GeneralGPIOReserved
27 VO1.8PowerOut 1.8VOutput(SuuportAtmost300mA)
28 VCC5VPowerIn SupplyVoltage, 5V+/-10%
Notes: TheI/Oportlevelvoltageis3.3V
3QuickStart
3.1 Restorefactorysettings
Inordertoensurethatall oftheconfigurationprocess iscorrect，bringthemoduletorestorethe
factorysettingsfirst.Ifitisalreadyinfactorymode,youcanskipthisstep.Poweronthemodule
with5V(350mA)electricsource,waitabout30 seconds,Afterstarting,LowerES/RSTpinmore
thanTrst,releaseofES/RSTfeet,thesystemwill automaticallyrestart.Afterrebootingthesystem
themoduleisalreadyinFactorymode.
3.2 Configuratenetworkparameter
SetthePCtostaticIPmodeandthenconnectitwiththemoduleviaEthernetorwifi.TheIP
address issetto192.168.16.100/255.255.255.0, gateway192.168.16.254.The(wifidefaultssidand
thedefaultpassword,see thisdocument.)openthebrowser http://192.168.16.254,entertheweb
configurationpage,defaultusernameandpasswordisadmin/admin.Modifythenetwork

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parametersthroughtheweb. Now,themodule sIPaddress is192.168.16.254. Configurationdetails
canbeseenin5.1.
3.3 Configurateserialnetworkparameter
Opensthebrowser http://192.168.16.254/ser2net.asp,entertheserial-to-networkweb
configurationpage.Configuretheserial-to-networkparametersasneededthroughawebpage.
Configurationdetailscanbeseenin5.2.
4FunctionDescription
Themodulecanbedividedintofourmajormodes defaultmode，serialtoEthernet,serialto
WIFICLIENTandserialtoWIFIAP.
4.1 SerialtoEthernet
Chart3.serialtoEthernetmodel
Inthismode,ETH1enable,WIFI,ETH2functionclose.Throughtheappropriatesettings,the
databetweenCOM1andETH1networkcanachievemutualconversion.
EthernetcanbeconfiguredasdynamicIPaddress(DHCP),canalsobeconfiguredasstaticIP
address (STATIC).
DHCPIP
/STATICIP
ETHERNETSERIAL
HLK-RM04MCU SWITCH
/ROUTER
COM1 ETH1

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4.2 SerialtoWIFICLIENT
Chart4.SerialtoWIFICLIENTmodel
Inthismode,WIFIenable,moduleworksintheclientmode,ETH1,ETH2functionclose.
Throughtheappropriatesettings,thedatabetweenCOM1andWIFInetworkcanachievemutual
conversion.
WIFICLIENTcanbeconfiguredasdynamicIPaddress (DHCP),canalsobeconfiguredas
staticIPaddress (STATIC).
WIFIsafety:supportallencryptionmethodsatpresent.
4.3 SerialtoWIFIAP
Chart5.SerialtoWIFIAPmodel
Inthismode,WIFIenable,moduleworksintheAPmode,ETH1,ETH2functionclose.
DHCPENABLE
SERIAL
HLK-RM04MCU WIFICLIENT
(PHONE、pad)
COM1 WIFI
AP
DHCPIP
/STATICIP
SERIAL
HLK-RM04MCU WIFIAP
COM1 WIFI
Client

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Throughtheappropriatesettings,thedatabetweenCOM1andWIFInetworkcanachievemutual
conversion.
WIFIsafety:supportallencryptionmethodsatpresent.
Inthismode,WIFIdevice canconnectwiththemoduleandbecomethedevice underWIFI
LAN.
4.4 Defaultmode
Chart6.Defaultmodemodel
Inthismode,WIFIenable,moduleworksintheAPmode,ETH1,ETH2functionenable.
ETH1worksasWAN,ETH2worksasLAN.Throughtheappropriatesettings,thedatabetween
COM1andnetworkcanachievemutualconversion.
WIFIsafety:supportallencryptionmethodsatpresent.
Inthismode,WIFIdevice canconnectwiththemoduleandbecomethedevice underWIFI
LAN.
WAN defaultIPisdynamicIPaddress.LAN,WIFIforthesamelocalarea network,enabledby
defaultDHCPserver.
4.5 Serialworkmodeswitching
Moduleserialworkstatusisdefinedastwomodes:transparenttransmissionmode,theAT
commandmode
DHCPENABLE
SERIAL
HLK-RM04MCU WIFICLIENT
(PHONE、pad)
COM1 WIFI
AP
ETH2
ETH1
LAN
WAN

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Chart7.Serialworkmodeswitching
Afterpower-onnormally,themodulewillcheckwhetherthecurrentnetworkserialport
configurationisnormal,ifthenetworkconnectionisnormal,themoduleautomaticallyenters
transparenttransmissionmode, andotherwisethemodulewillenterATcommandmode.
TherearetwokindsofmethodsfortransparentmodeenteringATcommandmode:
1. ES/RST pin
Inanystate,tomaintainthetimeofES/RSTpin lowlevelgreaterthanTesandlessthanTrst,
themodulewillimmediatelyentertheATcommand mode.
Chart8. ES/RST Exit transparent transmission mode
2. Specificserialdata
Whenserialexitpass-throughfeatureisturnedon,youcansendspecificserialdatatomake
themoduleexittransparenttransmissionmode. Serialexitpass-throughprocess isasfollows
>Tes
<Trst
t
ATCommand
.
ES/RST
NoYes
1.at+out_trans=0
1. ES/RSTpin
2. Specific serialdata
Powerup
Transparent
transmission
mode
ATcommand
mode
C
onfig.
normal?

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Chart9.Serialexittransparenttransmissionmode
Notes
Tpt Serialframing time
Thegroupframetimeintervalisgreaterthancontinuoussendthree "+",andthenwaitfor
about500ms(400ms<> 600ms)framing intervalisgreaterthanthetimetosendthree consecutive
0x1B.Themoduleswillexitthetransparenttransmissionmode.
Notes Thisfunctiononlycanbeusedinthecaseofserialexitpass-throughfeatureisturnedon.
4.6 Serial-netdataconversion
Therearefourmodeforserial-netconversion TCPServer、TCPClinet、UDPServer、UDP
Client。
TCPServer
Chart10.TCPServer
Inthismode, themoduleislisteningonthespecifiedport, waitingforTCPClientconnection,if
connected,all TCPdataissentdirectlytotheserialportend,thedataoftheserialendsenttoTCP
Clienend
HLK-RM04
TCPServer
TCP
Client
TCP
Client
TCP
Client
t
RX
ATCOMMAND MODE
+
+
0x1B 0x1B 0x1B
>Tpt 400ms<>600ms >Tpt
+

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TCPClient
Chart11.TCPClient
Inthismode,themoduleisconnectedtothespecifieddomain/IPport.All thedatasentfrom
theTCPServer-sideendwillbesentdirectlytotheserialport,thedatafromtheserialendsentto
theTCPServer-side.Abnormalnetworkdisconnectwillcausethemoduleactivereconnect.TCP
Activereconnectionfunctionenable,TCPServerinitiativedisconnected,themodulewill
immediatelytaketheinitiativetoreconnect, andotherwisethemodulewillnotreconnect.
UDPServer
Chart12.UDPServer
Inthismode, themoduleopensthelocaldesignatedport, once receivedthedatasenttotheport,
themodulewillsendthedatatotheserialport,andrecordtheremoteip,port.Themodulewill
recordonlythelastinformationontheremoteconnection.Serialreceiveddatawillbesentdirectly
totherecordedremoteip, port.
UDPClient
HLK-RM04
UDPServer
UDPClient
HLK-RM04
TCPClient TCPServer

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Chart13.UDPClient
Inthismode,themoduledirectlysendstheserialdatatothespecifiedip,port.Theserialdata
returnedfromtheserver-sidewillbedistributedtoserialport.
4.7Parameterconfigurationdirection
Themoduleprovidestwowaysfortheconfigurationparameters
1.Webpage；
2. SerialATcommand.
AccesstoWEBconfigurationpagerequirestheconfirmationofthemodule sIPaddresses, as
well astheusernameandpasswordthatauthenticatedbyWEB.
ConfiguratingparametersthroughtheserialportATcommandneedstomakethemoduleinto
theATcommandmodefirst.
SerialconfigurationtoolHLK-RM04_CONFIG ConfiguratethemodulethroughAT
command，provideaeasierandconvenientconfigurationprocess throughtheconfiguration
combinationofeachparameter.
5WEBconfiguration
HLK-RM04
UDPClient
UDPServer

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Chart7.WEBconfigurationpage
Throughthecorrectmoduleaddress(defaultaddress:http://192.168.16.254/ser2net.asp),you can
accesstotheWEBconfigurationpage.
Thepagecanbedividedinto3areas
1Networkconfigurationarea
2Serialfunctionconfigurationareas
3Configurationsubmitarea
5.1 WEBnetworkconfiguration
Netmodeselection
Default –defaultworkmode
ETH-SERIAL –SerialtoEthernet
WIFI(CLIENT)-SERIAL –serialtoWIFICLIENT
WIFI(AP)-SERIAL) –SerialtoWIFIAP
Choosedifferentworkmode，thewebwillshowyoudifferentpage.Modeconfigurationpage
isasfollows:

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5.1.1 SerialtoEthernet-dynamicip
Chart8.SerialtoEthernet-dynamic
5.1.2 SerialtoEthernet-staticip
Chart9.SerialtoEthernet-static
5.1.3 SerialtoWIFICLIENT-dynamicip
Chart10. serialtoWIFICLIENTdynamic

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5.1.4 SerialtoWIFICLIENT-staticip
Chart11. SerialtoWIFICLIENT-static
5.1.5 SerialtoWIFIAP
Chart12.SerialtoWIFIAP
5.2 WEBserialconfiguration
SerialWebconfigurationpage（ser2net.asp）isas follows

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Current showsthecurrentconfiguration ，Updated showsthecurrentrevisionparameters。
Submit submittherevision.
SerialConfigure Serialconfiguration.fomat Baud rate, databits, paritybit, stopbit.
Forexample “115200,8,n,1”.
SerialFramingLenth TheLenthofSerialFraming
SerialFramingTimeout ThetimeofSerialFraming
NetworkMode chooseClient、Serverornone。
RemoteServerDomain/IP RemoteServerDomain/IPaddress
Forexmpale 192.168.11.245 or www.hlktech.com .
Locale/RemotePortNumber Thespecifiedparameterisnotthesameunderthedifferentnetwork
modes. Clientspecifiestheportnumberontheremote,Serverspecifiedlocalportnumber.

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NetworkProtocol Usetcporudp Protocol
NetworkTimeout Undertheservernetworkmode, nodatatransmissionwithinthetimeoutperiod,
theconnectionwillbedisconnected. 0specifiesneverdisconnected.
5.3 SubmittingAlteration
Clickthebutton ‘Apply tosubmittheconfigurationofthecurrentpage. Ifsomeparametersof
thenetworkhavechanged,thesubmissionprocess maytakeabout25 seconds.Ifyouonlymodify
theserialfunctionalconfiguration, thesubmissionprocess willbecompletedsoon.
Clickthebutton ‘Cancel toreloadthepage,themodifiedconfigurationwillbelost.
6SerialAT commandconfiguration
6.1 AccesstoATcommandmode
Moduleinnetworkfault,suchasfaultallocationsituationwillautomaticallyexitthe
transparenttransmissionmode,enterATinstructionmode.Inanycondition,keepES/RSTfeetlow
leveloftimebutmorethanTesandless thanTrst,themodulewillenterATinstructionmode
immediately.
6.2 ATCommand
InATmode,youcanconfiguratethesystemparametersthroughtheserialportATinstruction.
Instructionformatisasfollows:
At+[command]=[value]\r
Accordingtothedifferentcommand,modulewill returnadifferentreturnvalue.
Forexample "at+remoteip=192.168.11.133\n"setremoteipaddress as192.168.11.133.
Forexample "at+remoteip=？\n"Inquiryremoteipaddress.
Atcommandisasfollows
>Tes
<Trst
t
ATCommand
.
V(ES/RST)