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HXJZ-873 Low Power Wireless Module
User’s Manual
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HXJZ-873 Mini Power Wireless Module User’s Manual
About HXJZ-873
HXJZ-873, the Low power wireless module, is used as the wireless data transmission in short distance.
With the small size, weight and power consumption and good stability and reliability, it has the function
of bi-directional data sign transmission, test and control.
It is used for Wireless meter reading, such as water meter, electric meter and gas meter, parking meter,
intellective card, electronic weighing apparatus, meter for checking on work attendance, queue wireless meter,
building control, shipping company control, alarm system, intelligent equipment, Automatic data
collecting system; Industrial remote control and remote test building automation, safety and
security, powerhouse equipment wireless monitor, entrance control system, etc. It provide the USB power
interface to be convenient
for the mini computer and PC users if necessary.
HXJZ-873 Feature
1.Ultra low power transmission
Transmission power :500mW, high receiving sensitivity: -123dbm , size: 58mm*38mm*10 mm.
2. Low power consumption
Receiving current<45mA，transmission current<360mA，sleeping current < 1mA.
3. Saving power model
HXJZ-873 have three saving power models: awaken from Hardware, awaken from COM Port, awaken from
air
(the user need to ask for it before place an order).
4.IO attemper function
HXJZ-873 have 2 on-off input ports, 2 on-off output ports.
5. ISM frequency band, not requiring on application of f requency point
Carrier frequency of 433MHz，also capable of 868/915MHz.
6. High anti-interference and low BER (Bit error Rate)
Based on the GFSK modulation mode, it adopts the efficient communication protocol. The actual bit error
rate of 10-5 ~ 10-6 can be achieved when channel bit error rate is 10-2.
7. Long transmission distance
Within the range of visibility, the reliable transmission distance is (BER=103/1200bps)>3000m, (BER=10-3/9600bps)>2000m when the antenna height is greater than 3m (BER=103/9600bps).
8. Transparent data transmission
Transparent data interface is offered to suit any standard or nonstandard user protocol.
Any false data generated in the air can be filtrated automatically (What has been
received is exactly what has been transmitted). The charge time for receiving and sending <10ms.
9. Multi-channel and speed
The standard HXJZ-873 configuration provides 16 channels. to meet the multiple communication combination
mode of the users. It has baud rate to be chosen such as 1200bps、2400bps、4800bps、9600bps、19200bps、
38400bps. The wireless transmission rate is direct ratio with baud rate of interface to meet user’s equipment
requirement.
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HXJZ-873 Mini Power Wireless Module User’s Manual
10. High speed wireless communication and large data buffer
When the speed rate in the air is quicker than interface’s, allowing to transmit unlimited length data at one
time, when the speed rate is slower or equal the interface’s, allowing the transmission of 255 Bytes long data
frames at one time for more flexible programming by users.
11. Intelligent data control and the user doesn’t need to prepare excessive programs
Even for semi duplex communication, the user doesn’t need to prepare excessive
programs, only receiving/transmitting the data from the interface. HXJZ-873 will automatically
complete the other operations, such as transmission/receiving conversion in the air, control, etc.
12. High reliability, small and light
Single chip radio- frequency integrated circuit and single chip MCU are used for
lessened peripheral circuits, high reliability, and low failure rate.
13. Watchdog monitor
Watchdog monitors the inner function, so that change the traditional product structure and
improve the product reliability.
Application of HXJZ-873
1.Appearance figure
Antenna socket
TX/RX indicator light
Red: TX , Green :RX
HXJZ-873 figure
User interface
2.HXJZ-873 interface definition
1) User’s interface
HXJZ-873 have one interface of TTL/RS232/RS485, user can choose one .
HXJZ-873 standard interface: when the antenna upward , the plastic socket gap
upward ，from left to right,1-9 pin in turn，as below figure:
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HXJZ-873 Mini Power Wireless Module User’s Manual
(Remarks: Jack space between is 2.0 mm.)
Definition of connecting pins and connection method:
Item no
PIN
Description Level
Connected
User terminal
Remarks
1
SLE
Sleep control (input) end
Low level to sleep, High
level awake
2
TXD/ A (RS-485)
Serial data transmitting end
RXD/ A (RS-485)
3
RXD/ B (RS-485)
Serial data receiving end
TXD/ B (RS-485)
4
GND
Power supply/Ground
DGND/AGND
5
VCC
+5±0.5V
+5±0.5V
TTL 3V user’s choose
6
I
2
NO. 2 on-off input
user terminal on-off output
7
I
1
NO. 1 on-off input
user terminal on-off output
8
O
2
NO. 2 on-off output
user terminal on-off input
9
O
1
NO. 1 on-off output
user terminal on-off input
User’s equipment
+5v regulator n. power supply
transmitter-receiver
Remarks:
To avoid to connect the interface reverse and can not communicate, please check and assure the voltage of 2
and 3 pin is existing by using Multimeter. If there is one pin that has the voltage, another has not voltage,
which means the interface is connected reverse, please change the connection wires between pin 2 and 3.
2) Power supply
HXJZ-873 uses DC power supply with voltage of +5V. It can also share power supply with other
equipment, however, the high quality power supply with desirable ripple factor should be selected. In addition,
the reliable grounding must be used if there is other device in the system equipment. In case of failure to
connect with the earth, it can form its own grounding, but it must be absolutely separated from the municipal
electric supply.
3) Application of IO cont rol
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HXJZ-873 Mini Power Wireless Module User’s Manual
HXJZ-873 have 2 on-off input ports，2 on-off output ports , you can use as follow:
HXJZ-873 on-off
Output
User terminal on-off
HXJZ-873 output app circuit
HXJZ-873 on-off Input
User terminal on-off output
HXJZ-873 Input app
circuit
3.Saving power model
HXJZ-873 have three Saving power models: awaken from Hardware, awaken from COM Port, awaken from
Air. The model can be set by RF Module software. You can choose one saving power model, the default
model is awaken from Hardware.
1) Awaken from Hardware:
When HXJZ-873 sleeping in this saving power model, the current is under 100uA.
Sleeping status: when you input low level at NO. 5 pin, HXJZ-873 can sleep. In this status, HXJZ-873 cannot
transmit and receive data.
Normal work status: when you input High level at NO. 5 pin, HXJZ-873 turn into Normal work status,
10ms later, HXJZ-873 can transmit and receive data.
Remarks: if you keep the NO. 5 pin untouched, then HXJZ-873 in Normal work status.
2) Awaken from COM Port:
When HXJZ-873 sleeping in this saving power model, the current is under 11mA. When
you input data to
HXJZ-873 with COM port, HXJZ-873 turn into Normal work status after 10mS and can transmit the data. When
HXJZ-873
did not receive data in COM port in the period of 20 seconds, HXJZ-873 will turn into sleep status.
3) Awaken from Air:
When HXJZ-873 sleeping in this saving power model, the current is under 20mA. When HXJZ-873 in
this saving power status, HXJZ-873 works intermittently. When HXJZ-873 received awaken data from air,
HXJZ-873 will turn into normal work status after 10ms, it can receive data normally. When HXJZ-873 did
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HXJZ-873 Mini Power Wireless Module User’s Manual
not receive data from air in the period of 20 seconds, it will turn into sleep. So when you wake up HXJZ873 from air, you can transmit some useless data firstly.
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HXJZ-873 Mini Power Wireless Module User’s Manual
4、IO Attemper Function
HXJZ-873 have two communicate protocol: full transparence protocol and ID protocol.
(Remark: full transparence protocol is default protocol, if you need HXJZ-873 with ID protocol,
please tell us when you book )
1) Full transparence protocol
In this mode, whatever you use, any data frame, HXJZ-873 can send it to another side as like as two
peas, it cannot change data format and data bits. HXJZ-873 with this transmit mode be used for Reading
meter, RTU and PLC with Address itself and so on.
2) ID protocol
When your terminal without Address or ID, you can use HXJZ-873 with ID protocol , in
this way you can differentiate the data from you terminal. The Main station you must use HXJZ-873 with
full transparence protocol,
the appurtenant station you must use HXJZ-873 with ID protocol. The HXJZ-873 of the appurtenant station
must set
ID according our RF module software, you can resolve the data from user terminal transmit according to ID
Protocol.
Remark: when you use HXJZ-873 with ID protocol, we provide 《communication protocol of HXJZ873》 and
programme manual.
3) IO attemper function
You can use one HXJZ-873 with full transparence protocol for the Main station, some HXJZ-873 with ID
protocol
for the appurtenant stations, each HXJZ-873 of the appurtenant station must set one unrepeatable
ID. You can attemper the appurtenant station IO according to communication protocol of HXJZ-873.
Remark: when you use IO attemper function, we provide 《 communication protocol of
HXJZ-873》 and
programme manual.
HXJZ-873 parameters setting
HXJZ-873 have one interface of TTL、RS232、RS485, You must specify the interface when you buy.
HXJZ-873
main parameters: COM baud rate and verify，RF baud rate, Channel and frequency。You can change these
parameters by our RF Module soft. When RF baud rate is faster than COM baud rate，One frame Can transmit
limitless data. When RF baud rate is not faster than COM baud rate ，One frame Can transmit 255 bytes most.
You can set the rate according your need. The general Power supply is 5V DC.
Two HXJZ-873 communicate must have condition as follow:
1.Their channels (i.e. frequency) are the same.
2.Their RF rates are the same.
3.RF Module Com baud rate and verify is agree with its equipment or PC that it connects with.
Parameters default value:
Channel： 1
Interface speed rate：9600BPS
Interface verify：none
Speed rate in air：9600BPS
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HXJZ-873 Mini Power Wireless Module User’s Manual
Channel and frequency list
Channel
Frequency
Channel
Frequency
1
430.2000MHZ
9
458.5250MHZ
2
431.4288MHZ
10
459.1250MHZ
3
431.7360MHZ
11
459.5250MHZ
4
430.507 2MHZ
12
460.1250MHZ
5
434.6940MHZ
13
460.5250MHZ
6
434.2332MHZ
14
461.1250MHZ
7
433.1580MHZ
15
461.5250MHZ
8
433.9260MHZ
16
462.1250MHZ
Technical specification of HXJZ-873
Modulation mode: GFSK
Working frequency: 433MHZ
Transmission power: <500mW
Receiving sensitivity: -123dBm
Transmitting current:: <360mA
Receiving current: <45mA
Sleeping current: <1mA
Channel speed rate: 1200/2400/4800/9600/19200/38400Bit/s, User can Choose one
Interface speed rate: 1200/2400/4800/9600/19200/38400Bit/s, User can Choose one
Change time for receiving and sending: <10ms
Interface data format: 8E1/8N1/8O1
Power supply: 5±0.5V DC
Working temperature: -20℃～85℃
Working humidity: 10%～90% relative humidity without condensation
Dimension: 58mm*38mm*10 mm
Attachable Communication with Model: JZ871/JZ872/HXJZ-873/JZ878
Model and name
JZ
873
-T
T: TTL interface
2: 232 interface
4: 485 interface
Naked board
Company logo
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HXJZ-873 Mini Power Wireless Module User’s Manual
Optional Antenna:
Trouble and solve ways:
NO.
Trouble
Trouble causes and solve ways
1
No shine of
Indicator light
a、Power Line badness touch .
b、Power is bad.
c、Power line meet in reverse, or diode of polarity protect is bad.
2
No transmit
or
No receive
a、Radio is badness touch with PC/terminal.
b、Radio with TTL/RS232/RS485 not match terminal.
c、RX frequency and TX frequency is not same.
3
Bit error rate
High
a、antenna not match, or touch bad;
b、RF baud rate is not right. c、
Power supply ripple is too great.
4
Indicator light
twinkling
a、Electromagnetism disturb in circumstance.
b、Same frequency disturb in the circumstance.
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