Shenzhen JZC Telecom Technology JZX874A User manual

JZC TELECOM
Technology
Shenzhen JZC TELECOM Technology CO.,LTD.
JZX874A/B Micro Power Wireless Module
User’s Manual
DVER 2.0
SHENZHEN JZC TELECOM TECHNOLOGY CO., LTD
TEL:[phone]-805 Mobile:[phone]
FAX: [phone] Website：http://www.rfmodules.net/
Email:busin[email protected]om 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

JZC TELECOM
Technology
JZX874 A/B Micro Power Wireless Module
SHENZHEN JZC TELECOM TECHNOLOGY CO., LTD TEL：[phone]
Tech:0755-61319411/61319410 WEB: http://www.rfmodules.net/
JZX874A/B Micro Power Wireless Module
JZX874A/B data transmission module is
highly integrated micro-power half-duplex, and
the aluminum shell with a USB port for wireless
data transmission module, has a strong anti-static
and anti-jamming,
which uses "TI" high-performance RF chips and
high-speed microcontroller. Module provides
eight channels, and is equipped with 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. And provides
USB interface means Plug and Play, small size,
easy to use.
Applications：
Features：
※Water, electricity, gas, heating
automatic meter reading system
※Frequency: 428-434MHz
※Wireless smart terminal PDA
※Wireless Queue System
※Wireless alarm and security system
※Smart Card
※Medical and electronic
instrumentation automation control
※Intelligent teaching equipment
※Intelligent home automation and
lighting control
※Wireless electronic scale
※Distance:500m-2000m(1200Bps)
※Modulation:GFSK
※Transparent transmission
※Built-in watchdog to ensure
long-term reliable operation
※USB Interface
※Convenient and flexible
※Almost 512bytes data buffer
※Suitable for built-in installation

JZC TELECOM
Technology
JZX874 A/B Micro Power Wireless Module
SHENZHEN JZC TELECOM TECHNOLOGY CO., LTD TEL：[phone]
Tech:0755-61319411/61319410 WEB: http://www.rfmodules.net/
JZX874A/B module is the use of aluminum alloy shield wireless module, there is a strong
anti-static and anti-jamming, the module uses ISM frequency band, without application frequency;
can be set to 16 communication channels, According to transmit power divided into: (874A:
transmission power less than 100mW, high receiving sensitivity-120dbm. 874B: transmit power
less than 500mW, high receiving sensitivity-123dbm), size 70mm * 45mm * 19mm (main module),
and produced JZX874C interface module supporting a large number for wireless meter reading,
reactive power compensation industry, easy to use.
JZX874A/B the use of transparent transmission mode, the user's system in order to ensure
reliable and stable increase in the transmission or the 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 recommended user program using the ARQ mode, the error data packets
retransmission. As follows:
If the actual error rate 10-4, users need to send 1KB about 10000bit information, if the 1KB 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.
JZX874A/B 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. JZX874A/B 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 1200/2400/4800/9600/19200bps five kinds of rate
and 8 frequencies; provide USB interface mode, it need only install with the provided USB driver,
you can get on a COM port on the PC for users to use.

JZC TELECOM
Technology
JZX874 A/B Micro Power Wireless Module
SHENZHEN JZC TELECOM TECHNOLOGY CO., LTD TEL：[phone]
Tech:0755-61319411/61319410 WEB: http://www.rfmodules.net/
JZX874A/B work for the conventional model, that module into the computer, install the driver
software, the main good, it is in receive mode; you also may be sending data.
Module with PC connections
USB connections
For software testing and change parameters

JZC TELECOM
Technology
JZX874 A/B Micro Power Wireless Module
SHENZHEN JZC TELECOM TECHNOLOGY CO., LTD TEL：[phone]
Tech:0755-61319411/61319410 WEB: http://www.rfmodules.net/
Methods of operation
1. on the computer to install "JZX-USB Driver"
2. JZX874A/B between the module and the PC, select the serial port used.
3. the radio detection, when the check to the station (the software will prompt detection
success), you can read or change a single parameter.
4. change the 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.
Frequency
Communicated Module
JZX874A/B wireless module with all the JZX87 series of models to communicate with each other.
Communications as long as you pay attention to the following:
A. select all the modules to communicate with each other the same channel.
B. you have the same communication module of the air rate.
C. the communication module, power supply, interface connection is connected

JZC TELECOM
Technology
JZX874 A/B Micro Power Wireless Module
SHENZHEN JZC TELECOM TECHNOLOGY CO., LTD TEL：[phone]
Tech:0755-61319411/61319410 WEB: http://www.rfmodules.net/
JZX874A/B default parameter
Channel: Five channel;
Serial port speed: 9600BPS
Serial port verification: Null
Airborne speed: 9600BPS
Technical specification of JZX874A/B
Technical specification
Modulation：
GFSK
Frequency：
433MHz
Transmit Power：
A:100mW(20 dB) B:500mW(27dB)
Receiver sensitivity：
A:-120dBm B:-123dBm
Transmit Current：
<400mA
Receive Current：
<50mA
Channel Rate：
1200/2400/4800/9600/19200Bit/s Customized
Serial Port Rate：
1200/2400/4800/9600/19200Bit/s Customized
Interface：
USB
Interface-data-format：
8E1/8N1/8O1
Working Power：
DC 4.5-5.5V
Working Temperature：
-20℃～75℃
Working humidity：
10%～90% Relative humidity, non condensing
Size：
70mm*45mm*19mm
Communicated Model：
JZX871/JZX873/JZX872/JZX875/JZX878/JZX874C

JZC TELECOM
Technology
JZX874 A/B Micro Power Wireless Module
SHENZHEN JZC TELECOM TECHNOLOGY CO., LTD TEL：[phone]
Tech:0755-61319411/61319410 WEB: http://www.rfmodules.net/
Optional Antenna:
Trouble and solve ways:
Trouble and solve ways:
Troubles
Cause and Remedy
Between
devices not
communicated
Communication at both ends of the air rate, parity inconsistency
Frequency inconsistency
Without power
Module has destroyed
The pin of sleep mode not set
Short Distance
Environment very bad or the antenna is blocked
The existence of the same frequency or magnetic or electrical interference, or
replacement of the channel away from sources of interference
Power match or not. Voltage and current is large enough
Module cant
communicate
with PC
Without power
TTL to RS232 converter is damaged, or without power supply
Converters .module.pc with connection error
Change work channels
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