Technology JZX874C Micro-power wireless module User`s Manual
Contents
1. U Shenzhen JZC TELECOM Technology CO LTD JZC TELECOM Technology JZX874C Micro power wireless module User s Manual DVER 2 0 SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 86 755 86714296 805 Mobile 86 13692285161 FAX 86 755 22676585 Website http www rfmodules net Email business jzxtx com P O 518040 Skype jizhuo_ 002 Address NO 308 310 B BLD Xanadu Creative Park Ping Shan 1 Road Taoyuan Street Nanshan District Shenzhen China U JZC TELECOM Technology JZX874C Micro power wireless module JZX874C Micro power wireless module JZX874C data transmission module is highly integrated micro power half duplex wireless data transmission module which uses TI high performance RF chips and high speed microcontroller Module provides eight channels and is equipped with a professional set up software for the user to change parameters the module with transparent transmission mode no user written set and transmission procedures you can transmit data of any size Module is small the use of voltage is wide easy to use Applications X Water electricity gas heating automatic meter reading system XWireless smart terminal PDA XWireless Queue System XWireless alarm and security system XSmart Card X Medical and electronic instrumentation automation control X Intelligent teaching equipment X Intelligent home automation and lighting control XWireless electronic scale SH2. 4 5 V I TTL TO RS232 vais TX R 232 TXD RX S232 RXD PC with RS232 A ee Module COM port ornverter Note As JZX874C mode TTL interface module so the PC must be added to connect the TTL to RS232 converter and converter must supply DC 5V of electricity For software testing and change parameters gt RF Bodule Radio software 3 06 dsl IGT E l S Sa l u kE s S a Become 0 sran Beem Are m Even lt paos Radio Parameters Transmit Bom Sides Data transmit Please Choose Sodel Base Fre or Search FIRST taal ZK874 lt Base fre 433MHZ lt Channel and Frequency Channel 5 s Rea write Frequend4 34 6S40MHZ COM Port Comt RF Baud Rate Baud p aie CTH Baud Rat 19200 Roas wrew very NONE COM Parameters Data Bits B Baud Rate 9600 lt gt Reacts Weite Begin Bits venty NONE Reap Stop Bits lt RSSI and Power resi pof om Anaon Che Close 2 Canc a ai ss wo Ta T Rect m E ed ee g gwel lt I Yes SheanIhen IL thas technelegy CD COM 9000 NONE 1 SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 86714296 Tech 0755 61319411 61319410 WEB http www rfmodules net 4 U JZC TELECOM Technology JZX874C Micro power wireless module A JZX874C module connected to the PC and plug in the power select the serial port used B the radio detection when the check to the station the software will prompt detection success you ca
3. Channel First channel 1e 430 2000MHze vee be 434 6940MHze Serial port speed 9600BPS an ae ead 20 431 4288MHze 6 434 2332MHze erial port veriication INU 3e 431 7360MHze Te 433 1580MHze Airborne speed 9600BPS de 430 5072MHze ge 433 9260MHze JZX874C default parameter Gana Frequency De fe Te Be Optional Antenna x iim small rod antenna thick whip antenna small suction cup antenna SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 86714296 Tech 0755 61319411 61319410 WEB http www rfmodules net U JZC TELECOM Technology JZX874C Micro power wireless module Technical specification of JZX874C Technical specification 100mW 20 dB the power would be 50mw when voltage at 3V lt ISmA_CTTL interface Channel Rate 1200 2400 4800 9600 19200 38400Bit s customer customized Communicated Model JZX874C JZX872 JZX873 JZX874 JZX875 JZX878 SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 86714296 Tech 0755 61319411 61319410 WEB http www rfmodules net 8 U JZC TELECOM Technology JZX874C Micro power wireless module Trouble and solve ways Trouble and solve ways Communication at both ends of the air rate parity inconsistency Frequency inconsistenc Between devices not Without power communicated Module has destroyed The pin of sleep mode not set Environment very bad or the antenna is blocked The existence of the same fr
4. 14296 Tech 0755 61319411 61319410 WEB http www rfmodules net 2 U JZC TELECOM Technology JZX874C Micro power wireless module sleep mode that is through the power module in a dormant state it must be user controlled mode Wake up pin block the module can send and receive data In the application of JZX874C module the module uses a wide voltage range but also be divided into two kinds of voltage the first for the 5V power supply module also known as conventional module the voltage of DC 4 5 5 5V The second is 3V power supply modules custom module for the user the voltage of DC 2 7 3 3V users in the use of power to DC power supply the current must be greater than 50mA but to choose a good power supply ripple Module pin definition JZX874C module J1 Interface Block a total of five pins defined n detail as follows FP PH h RXD RS485 B Serial data receiving TXD RS485 B o ee Module with customer equipment connections F3 3 fronsen Term mouse in TTL Or vacant Equipment Module Note JZX874C did not sleep in the state the module of the SLE feet must be vacant In the sleep state when the module must be low the module can send and receive data SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 86714296 Tech 0755 61319411 61319410 WEB http www rfmodules net 3 U JZC TELECOM Technology JZX874C Micro power wireless module Module with PC connections
5. ENZHEN JZC TELECOM TECHNOLOGY CO LTD Tech 0755 61319411 61319410 Features Frequency 430 434MHz x Distance 1200m 1200Bps x Modulation GFSK x Transparent transmission X Built in watchdog to ensure long term reliable operation xUART TTL RS232 RS485 Interface X Convenient and flexible x Almost 512bytes data buffer X Suitable for built in installation TEL 0755 86714296 WEB http www rfmodules net U JZC TELECOM Technology JZX874C Micro power wireless module JZX874C wireless module the use of ISM frequency band without application frequency can be set to 8 communication channels transmit power of 100mW 20dB high receiver sensitivity 121dbm size 70mm 45mm 19mm without antenna base a large number of the billing system to use very convenient for users to do the embedded wireless systems JZX874C the use of transparent transmission in order to ensure the reliability and stability of the user s system plus the transmission checksum or CRC checksum error detection mode the error data retransmission Transceiver module buffer of 512bytes means that users can be in any state 512bytes of data transfer 1 when the speed is greater than the serial port is set to air rate is theoretically unlimited length can send information packets but does not recommend users to send long data packets the proposed length of each packet data between 60 100B generally not longer than the 120B and reco
6. de to sleep Module in sleep state to work state it is necessary to SLE pin from high to low MCU is working on several ms to enter into the state but in order to send data to the stability of the user side should be more than 60ms latency available for data transmission SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 86714296 Tech 0755 61319411 61319410 WEB http www rfmodules net DB U JZC TELECOM Technology JZX874C Micro power wireless module vop IDLESSE IDLESSE 60mS Transform on transceiver and receiver End user devices receiving the data sent by the module and then transferred to the data center must have sent more than Ims delay Module A RXD Module B TXD L lms d From Module A transmit to Module B receive When the user is doing data transfer the data must take into account the delay module in order to ensure the reliability of wireless transmission the company added the module FEC forward error and other encoding rules Then from A to B module module in the middle of the transmission of data with different baud rates for the delay in the following table Air rate Time ts Air Rate Time ts bps ms bps ms O g 38400 4800 SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 86714296 Tech 0755 61319411 61319410 WEB http www rfmodules net 6 JZC TELECOM Technology T JZ A RXD JZ B TXD JZX874C Micro power wireless module
7. equency or magnetic or electrical interference or Short Distance l replacement of the channel away from sources of interference Power match or not Voltage and current is large enough Without power TTL to RS232 converter is damaged or without power supply Module cant Converters module pc with connection error communicate Change work channels with PC Serial port baud rate settings are not correct or air to re set Power supply ripple big replace the power supply Note All of the rights of final interpretation and modification by our company SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 86714296 Tech 0755 61319411 61319410 WEB http www rfmodules net 9
8. mmended user program using the ARQ mode the error data packets retransmission As follows If the actual error rate 10 4 users need to send IKB about 10000bit information if the IKB data as a packet sent at least theoretically there will be a data error in the receiver then the 1KB data can never be received correctly If it is divided into 10 packages each package 100B then send 10 packets the packets according to a probability of only 1 error the error in the form of a packet retransmission by ARQ 1 although it took more than 1 packet and the efficiency decreased by about 10 but it can guarantee all the information is correctly received JZX874C set parameters the market is no longer used wireless modules used in the traditional way to change the parameters of the jumper causing long term use because it brings bad options less dynamic change is not easy a lot of inconvenience JZX874C using the serial port setting parameters easy and quick easy set refers to the chip embedded in the user program and operating software in the background Meanwhile module 1200 2400 4800 9600 19200 38400bps six kinds of rate and 8 frequencies provide UART TTL RS232 RS485 three kinds of interfaces Choice for users In the work on JZX874C There are two ways of working first for the conventional model which module is powered On is in receive mode you also can be sending data The second is SHENZHEN JZC TELECOM TECHNOLOGY CO LTD TEL 0755 867
9. n read or change a single parameter C change parameters when you select a parameter you want to set after set up to read again to see the parameters of the module is not what you want Note Two or more modules to communicate then the frequency of the station modules and air rate must be consistent Module to communicate with user equipment the module s serial port parameters and user settings must be consistent Communicated Module JZX874C wireless module with all the JZX87 series of models to communicate with each other Communication as long as you pay attention to the following A select all the modules to the same channel B you have the same communication module of the air rate C the communication module power supply interface connection is connected Sleep Mode JZX874C divided into dormancy release version with no sleep JZX874C sleep after the current is 10uA JZX874C hibernation wake up mode for the hardware Wake is the fifth through the interface hardware input pin high to sleep wake up input low If the user has a sleep function JZX874C but do not want to use the hibernate feature available through JZX861 pin 5 to ground then achieve Details as followings Module in the working state to sleep state it is necessary to SLE pin from low to high if the module is idle no transmit receive data MCU to sleep within about Ims If you are in the collection and development data the data will be processed the frame si
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