SA818PRO G-NICE | Alldatasheet
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www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -1- SA818Pro
- Designed to comply with CE/FCC requirements
- Independent TX/RX frequencies, supports both voice and data transmission
- 38 CTCSS levels & 166 CDCSS levels
- High power, long range (1.6 W @ 4 V, 2 W @ 5 V; 1 W for CE/FCC versions) Product Specification
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -2- Catalogue Note:RevisionHistory Revision Date Comment V1.0 2026-02 Firstrelease We reserve the right to change, correct, enhance, or modify the product and this document at any time withoutpriornotice.Usersshouldobtainthelatestinformationbeforeplacinganorder.Theinformation inthisnoticesupersedesallpreviousversions.NiceRFreservesallrights.
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -3- 1. Descriptions SA818Pro is a cost-effective integrated professional walkie-talkie module, built-in high-speed micro-controller,high-performance RF transceiver chipand RF power amplifier,and provides a standard serial port to communicate with the module, so that the relevant parameters of the module and the transceiver can be set quickly and easily. Function to control. Users only need to connect an audio amplifier, microphone, and speaker to this module to work as a small walkie-talkie. The simplified interface and ultra-small size enable this module to be widely used, and it can also be easily and quickly embedded in various handheld devices to improve the overall performance of the terminal product. SA818Pro strictly uses lead-free technology for production and testing, and meets RoHS and Reach standards. SA818ProwalkietalkiemodulebuildsontheSA818byaddingalow-noiseamplifier(LNA),improving receiver sensitivity by 4 dB, and introducing support for lightweight data transmission. This enables thedevicetotransmitstatusinformation,shortcommands,orpositioningdatainadditiontovoice. In terms of RF performance, the SA818Pro delivers stable output power across the entire 400~470MHz band,withpowervariationoflessthan1dB.Atlowpower,itachieves27dBm1dBover400-470Mhz (Note:TheSA818ProisfullycompatiblewiththeSA818inbothhardwareandsoftwareinterfaces.) The SA818Pro is strictly manufactured and tested using lead-free processes, complying with RoHS and Reachstandards.TheSA818Promoduleisalsoavailableinaversion that meetsCEcertification tocater todifferentmarketdemands. 2. Features UHFbandfrequency:400~480MHz VHFbandfrequency:134~174MHz (Above2frequencybandsareoptional. Customizedoptionsareavailablefor 200–260 MHzand470–520 MHz.) TxandRxfrequency,TxandRxCTCSS, CDCSScanbesetalone. Bandwidth12.5KHz/25KHz RSSISignalStrengthIndicator Distanceupto4-5kminopenarea Sensitivity：-124dBm Supportswirelessdatatransmissionandreception High-integrated,SmallSize 38CTCSS&166CDCSS 8levelsquelch 8adjustablevolume HighPower:1.5W(typical),1W(CE)， LowPower:500mW Widerangeofworkingvoltage:3.3-5.5V TCXOcrystal,Stableperformance 3. Application smallwalkietalkie Invisibleintercomsystem audiosurveillancesystem OutdoorSportproducts buildingcommunitysecuritysystem
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -4- 4. Internalblockdiagram 5. Specification Parameter Testcondition Min Typ. Max Unit Powersupply 3.3 4.2 5.5 V WorkingTemperaturerange -30 25 70 ℃ CurrentConsumption Sleepcurrent ≤1 uA RXcurrent 76 mA TXcurrent（Highpower） @4.0v,1.6W 920 1000 mA TXcurrent（lowpower） @4.0V,0.5W 500 600 mA TXcurrent（Highpower） @4.0v,1.0W,FCC 800 900 mA TXcurrent（lowpower） @4.0V,0.5W,FCC 600 650 mA TransmittingRFParameters Frequencyrange UHF 400 470 MHz VHF 134 174 MHz Outpower（highpower） @VCC=4.0V 31 31.8 32.5 dBm Outpower（lowpower） 26 27 27.5 dBm Outpower（highpower） @VCC=4.0V,FCC 28.5 29.5 30.5 dBm Outpower（lowpower） @VCC=4.0V,FCC 26 27 27.5 dBm Modulationfrequency @1.5KHz/2.5KHzfrequency deviation 10 mV Audiomodulationdistortion 2 5 % SignaltoNoiseRatio 38 40 45 dB adjacent-channelpower @12.5Koffset -60dBc dBm CTCSSModulationfrequency 0.35 0.5 0.75 KHz ReceivingRFParameters Receivingsensitivity 13dBoutputvoice(SNR) -124 dBm ReceivingSNR @1.5KHzfrequencydeviation 45 50 dB Audiooutputamplitude 700 mV AudioOutputimpedance 200 OHm
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -5- 6. OutputPowervs.SupplyVoltage(@424.75MHz) SupplyVoltage（V) OutputPower（dBm) Workingcurrent（mA) 3.0 27.8 629 3.3 29.6 759 3.6 31.0 889 4.0 32.0 964 4.4 32.7 1020 5.0 33.7 1110 7. TypicalApplicationSchematic 8. Protocol The module provides a good user interface (standard serial port), users can send commands through the serial port to adjust and read the module's parameters. The memory is integrated inside the module,andtherelatedparametersoftheconfigurationcanbestoredwhenthepowerisoff. Commandsendingformat: Allcommandsbeginwith"AT"andendwith<CR><LF>. Afterthemoduleisrunning,thestandardsettingsofthecommunicationserialportare: Rate:9600bpsDatabit:8bitStopbit:1bitParitybit:none Commandreturnformat:
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -6- Returnsthecharacterstringrelatedtothesendingcommand,allendingwith<CR><LF>. Frameformatdefinition: AllcommandsinthecommunicationprotocolaretransmittedinASCIIcode. Theterminal-to-modulecommunicationadoptstheform:AT+DMOXXX The module adopts the form of terminal communication: +DMOXXX (Note: the terminal does not needtoreturn) 9. Instructions AT+DMOCONNECThandshakecommand Description: The handshake command is intended to prove that the module is connected and operating normally. Each time the terminal is sent, the module will respond after receiving this command. Multiple response command; if the module does not respond to the 3-way handshake command, the terminalshouldrestartthemodule. Format:AT+DMOCONNECT Example:AT+DMOCONNECT +DMOCONNECThandshakeresponsecommand Description: Module handshake response command, the module must respond immediately after receivingtheDMOCONNECTcommand. Format:+DMOCONNECT:0 Example:+DMOCONNECT:0 Parameterdescription:0—>Normalworkingstate S+sweepcommand Description:Setthefrequencytobescanned. Format:S+scanRF Example:S+455.2250 ParameterDescription: scanRF:thefrequencytobescanned S=Sweepfrequencyresponsecommand Description: Sweep response command, the module will go to sweep after receiving the sweep
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -7- command,andreturnthesweepresultaftersweepingthefrequency Format:S=X Parameter X description: 0—>the frequency to be swept has a signal 1—>the frequency to be swept hasnosignal AT+DMOSETGROUPsetgroupcommand Description:Settheworkingparametersofthemodule. Format:AT+DMOSETGROUP=GBW,TFV,RFV,Tx_CXCSS,SQ,Rx_CXCSS Example1:AT+DMOSETGROUP=0,415.1250,415.1250,0000,1,0000 Example2:AT+DMOSETGROUP=0,415.1250,415.1250,023N,1,025I ParameterDescription: GBW:bandwidthsetting(0:12.5K1:25K) TFV:Transmitfrequencyvalue(134.0000M～174.0000M,400.0000M～470.0000M) RFV:Receivingfrequencyvalue(134.0000M～174.0000M,400.0000M～470.0000M) (Note:Thetransmittingfrequencyandreceivingfrequencycanbethesameordifferent,buttheset frequencymustbe12.5Kand25K. Integermultiples) Tx_CXCSS:TransmitCXCSSvalue SQ:Squelchlevel(0～8)(0:monitormode,scanmodecannotbeused0) Rx_CXCSS:ReceiveCXCSSvalue (Note: different CXCSS values can be used for transmitting and receiving, 0000: no coding 0001-0038:CTCSS Followedbyletters:CDCSS,codingseeappendix1) +DMOSETGROUPSetgroupresponsecommand Description:Afterthemodulereceivesthesettinggroupcommand,itreturnstheoperationresult Format:+DMOSETGROUP:X Example:+DMOSETGROUP:0 ParameterXdescription:0—>success,1—>datasettingoutofrange AT+DMOSETVOLUMEsetvolumecommand Description:Setthevolumelevelofthemodule
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -8- Format:AT+DMOSETVOLUME=X Example:AT+DMOSETVOLUME=1 ParameterXDescription:Thevalueofthevolumelevelparameteris1～8 +DMOSETVOLUMEvolumesettingresponsecommand Description:Setthevolumelevelofthemoduleandanswertheresult Format:+DMOSETVOLUME:X Example:+DMOSETVOLUME:0 ParameterXdescription:0—>settingsuccessful1—>settingfailed AT+RSSIreadsignalstrengthcommand Description:Readthesignalstrengthofthemodule Format:RSSI?Example:RSSI? RSSI=XXXReadsignalstrengthresponsecommand Description:Readthesignalstrengthresultresponseofthemodule Format:RSSI:XXX Example:RSSI:010 ParameterXdescription:thecurrentsignalstrengthvalue,thelargerthevalue,thestrongerthesignal strength AT+SETTAILSettailcommand Description:Turnon/offtheemissiontailtoneofthemodule Format:AT+SETTAIL=X Example:AT+SETTAIL=0 Parameterdescription:X,0meansturnoffthetailtone,1meansturnonthetailtone; +DMOSETTAILEndtonesettingresponsecommand Description:Settheendtoneresultresponseofthemodule Format:+DMOSETTAIL:X Example:+DMOSETTAIL:0 DescriptionofparameterX:0—>settingsuccessful1—>settingfailed +DMOREADGROUPReadgroupcommand Description:ReadtheworkingparametersofthemoduleAT+DMOREADGROUP
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -9- Format:AT+DMOREADGROUP Example:AT+DMOREADGROUP +DMOREADGROUPReadgroupresponsecommand Description:Readgroupcommandresponse Format:+DMOREADGROUP=GBW,TFV,RFV,Tx_CXCSS,SQ,Rx_CXCSS Example1:+DMOREADGROUP:0,433.5000,433.5000,0001,1,0001 ParameterDescription: GBW:bandwidthsetting(0:12.5K1:25K) TFV:Transmitfrequencyvalue(134.0000M～174.0000M,400.0000M～470.0000M) RFV:Receivingfrequencyvalue(134.0000M～174.0000M,400.0000M～470.0000M) Tx_CXCSS:TransmitCXCSSvalue SQ:Squelchlevel(0～8)(0:monitormode,scanmodecannotbeused0) Rx_CXCSS:ReceiveCXCSSvalue (Note: different CXCSS values can be used for transmitting and receiving, 0000: no coding 0001-0038:CTCSS Followedbyletters:CDCSS,codingseeappendix1) AT+VERSIONreadversionnumbercommand Description:Readthesoftwareversionnumberofthemodule Format:AT+VERSION Example:AT+VERSION +VERSIONReadversionnumberresponsecommand Description:Readversionnumberresponsecommand Format:+VERSION:X Example:++VERSION:SA818PRO_V1.0 Parameterdescription:X—>modulesoftwareversionnumber AT+TXOMES—SMSSendingFunction Description:UsedbythetransmittertosendSMS(shortmessage)data. Format:AT+TXOMES=XXXX Example1:AT+TXOMES=1234567890
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -10- Theactualtransmitteddataisthestring“1234567890”,withalengthof10bytes. Example2:Hexadecimaltransmission:41542B444D4F4D45533D313233343536373839 Theactualtransmittedcontentcorrespondstocharacters“1”to“9”,withadatalengthof9bytes. Notes: 1. The maximum number of transmitted bytes is19. Sending 19bytes takes approximately 300–400 ms. Considering mode switching and the response time of both transmitter and receiver, if data is transmitted frequently, it is recommended to set the sending interval to 1–2 seconds (recommended 1.5s). 2. The transmitter and receiver must be set to the same frequency,and SQ(squelch level, 0–8) must notbesetto0. +TXOMES—SMSSendAcknowledgement Description:AcknowledgementcommandreturnedaftersendinganSMS. Format:+TXOMES:X Example:+TXOMES:0 ParameterX: 0→Sendsuccessful 1→Sendfailed +RXOMES—SMSReceiveUpload Description:AutomaticuploadofreceivedSMSdataonthereceiverside. Format:+RXOMES=xxxxxxxxxx Datareceivedbythereceiver Example:+RXOMES=0123456789 Thereceiveddataisthestring“0123456789”. 10. Pindefinition
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -11- PinNO. Pinname I/Ostate
1 AudioON Audiopoweramplifiercontrol:defaulthighlevel;goeslowwhenasignal
2 UPDATA UART Upgrade Pin – Pull low on power-up to enter UART upgrade
mode;normallyleftfloating.
3 AF_OUT Audiooutput
4 NC Notconnected
5 PTT TX/RXControlPin–“0”fortransmit,“1”forreceive;defaultisreceive.
6 PD Module Sleep Enable – “0” or floating for sleep; “1” for normal
operation. 7 H/L RFPowerControl–Groundforlowpower;floatingforhighpower.
8 VBAT Connectpowerpositive
9 GND Grounding
10 GND Grounding
11 NC Notconnected
12 ANT connect50ohmantenna
13,14,15 NC Notconnected
16 RXD
RXDofthemoduleandconnecttoexternalTXD *Beforeentersleepmode,userneedtopulllowRXDPin topreventcurrentleakageorpoorresetinthenexttime.
17 TXD TXDofthemoduleandconnecttoexternalRXD
18 MIC_IN Microphoneorlinein
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -12- 11. MechanismDimension(Unit:mm) 12. Orderinformation ProductName Description SA818Pro-U Workingfrequency:400~470MHz SA818Pro-V Workingfrequency:134~174MHz SA818Pro-U-FCC Operatingfrequencyband400~470MHz,FCCcertifiedversion 13. FAQ a) Whymodulecannotcommunicateproperly？ 1) Checkifthereispowerconnectionerror； 2) CheckifModuleisinnormalcommunicationmode； 3) Checkiffrequency,channel,andmutearesame； 4) Checkifmoduleisdamaged； b) Whytransmissiondistanceisnotfarasitshouldbe？ 1) Powersupplyrippleistoolarge； 2) Theantennatypesdonotmatch,ornotinstalledproperly； 3) Thesamefrequencyinterference； 4) Thesurroundingenvironmentisharsh,stronginterferencesources.
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -13- Appendix1：DEMOBoard In additional, we provided DEMO Board for customers to debug the software program, test all the functionandmeasurethedistance.Thefigureshowsasbelow: Usercansetrelatedparametersthroughthebuttons: 1) Txfrequency：400~470MHz 2) Rxfrequency：400~470MHz 3) ChannelBandwidth：12.5KHz/25KHz 4) CTCSS：0~38 5) CDCSS:0—166 6) Squelch：0~8 7) Volume：1~8 ButtonOperation： 1) SETbutton Presstoentersettingmode. 2) UP/Downbutton Insettingmode,presstoincrease/decreasethesettingitem.
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -14- 3) PTTbutton IfNotinsettingmode,Presstotalk,(Listenstatewhenreleased) 4) High/Lowslideswitch Switchtohigh/lowoutputpower Note: With data FLASH inside, all the setting parameters are saved and keep unchangedevenpoweroff.
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -15- Appendix2：Muteontheinterfacedisplayandsendcorrespondencetable ★ Note: N code is inverted corresponding to I code, such as 023N code is 023I code is inverted:023N=~023I=00110111111000111001000 Code TransformBitPattern HexBitPattern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
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com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
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -17- 565I 10101110100111100011000 574F18 606I 01100001100110011011101 30CCDD 612I 01010001100110001110011 28CC73 624I 00101001100110101111000 14CD78 627I 11101001100111111000000 74CFC0 631I 10011001100100010100111 4CC8A7 632I 01011001100101000011111 2CCA1F 654I 00110101100111000011001 1ACE19 662I 01001101100111100010010 26CF12 664I 00101101100111001001110 16CE4E 703I 11000011100111010100010 61CEA2 712I 01010011100110111101000 29CDE8 723I 11001011100100011001110 65C8CE 731I 10011011100100100111100 4DC93C 732I 01011011100101110000100 2DCB84 734I 00111011100101011011000 1DCAD8 743I 11000111100110110010100 63CD94 754I 00110111100111110000010 1BCF82 Appendix3：Analogsubtonecomparisontable Subtonecoding 1 2 3 4 5 6 7 8 9 10 Subtonecoding 11 12 13 14 15 16 17 18 19 20 Subtonecoding 21 22 23 24 25 26 27 28 29 30 Subtonecoding 31 32 33 34 35 36 37 38
www.nicerf.com SA818Pro NiceRF Wireless Technology Co., Ltd. Rev 1.0 sales@nicerf.com -18- Appendix4：SMDReflowChart