HXJZ-877 Low Power Wireless Module User`s Manual
Contents
1. soft Wh en 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 877 communication 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 comply with its equipment or PC Parameters default value Channel 5 Interface speed rate 9600BPS Interface verify none Speed rate in air 9600BPS 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 5072MHZ 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 HXJZ 877 Mini Power Wireless Module User s Manual Technical specification of HX JZ 877 Modulation mode GFSK Working frequency 433MHZ Transmission power SOOmW Receiving sensitivity 123dBm Transmitting current lt 360mA Receiving current lt 45mA Sleeping current lt 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 use r can Choose one Change time for receiving and sending lt 10ms Interface dat2. Awaken from Hardware 1 Awaken from Hardware In this model the current is under 100uA Sleeping status when you input low level at NO 5 pin HXJZ 877 can sleep but it can not transmit and receive data Normal work status when you input High level at NO 5 pin JZ873 turn into Normal work status 10ms later it can transmit and receive data Remarks if you keep the NO 5 pin untouched then HXJZ 877 is in Normal work status 2 Awaken from COM Port When HXJZ 877 in this model the current is under 11mA When you input data with COM port HXJZ 877 turn into Normal work status after 10mS and can transmit the data When HXJZ 877 not receive data in COM port in 20 seconds HXJZ 877 will turn into sleep status 3 Awaken from Air In this model the current is under 20mA When in this status HXJZ 877 works intermittently When HXJZ 877 received data from air HXJZ 877 will turn into Normal work status after 10ms It can receive data normally When HXJZ 877 not receive data from air in 20 seconds It will turn into sleep So when you choose HXJZ 877 Mini Power Wireless Module User s Manual Awaken from Air you can transmit some useless data firstly HXJZ 877 parameters setting HXJZ 877 have one interface of TTL RS232 RS485 You should say clearly which interface you need when place an order HXJZ 877 main parameters COM baud rate and verify RF baud rate Channel and frequency You can change these parameters by our RF Module
3. HXJZ 877 Low Power Wireless Module User s Manual HXJZ 877 Mini Power Wireless Module User s Manual About HXJZ 877 HXJZ 877 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 apparatu s 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 877 Feature 1 Ultra low power transmission Transmission power 500mW high receiving sensitivity 123dbm Size 63mm 43mm 15mm 2 Low power consumption Receiving current lt 45mA transmission current lt 360Ma sleeping current lt ImA 3 Saving power model HXJZ 877 have three saving power models awaken from Hardware awaken from COM Port awaken from Air 4 ISM frequency band not requiring on application of frequency point Carrier frequency of 433MHz also capable o
4. a format 8E1 8N1 801 Power supply 5 0 5V DC Working temperature 20 C 85 C Working humidity 10 90 relative humidity without condensation Dimension 64mm 43mm 15mm Attachable Communication with Model JZ871 HXJZ 877 JZ873 JZ878 Model and name T TTL interface 2 RS232 interface 4 RS485 interface td With shell Company Logo HXJZ 877 Mini Power Wireless Module User s Manual Optional Antenna spillikin Flagelliform Small acetabula antenna Trouble and solve ways Item Trouble Trouble causes and solve ways a Power Line badness touch No shine of 1 b Power is bad Indicator light c Power line meet in reverse or diode of polarity protect is bad a Radio is badness touch with PC terminal No transmitting or 2 ak b Radio with TTL RS232 RS485 not match terminal receiving c RX frequency and TX frequency is not same a antenna not match or touch bad 3 High Bit error rate b RF baud rate is not right c Power supply ripple is too great Indicator light a Electromagnetism disturb in circumstance twinkling b Same frequency disturb in the circumstance
5. ake 2 TXD A Serial data transmitting RXD A RS 485 RS 485 end 3 RXD B Serial data receiving end TXD B RS 485 RS 485 GND Power supply Ground DGND AGND 5 VCC 5 0 5V 5 0 5V TTL 3V user s choose 6 L No use retain 7 L No use retain 8 O2 No use retain 9 O No use retain HXJZ 877 Mini Power Wireless Module User s Manual User s equipment 5v regulator n power supply an fF WwW N e transmitter receiver Remarks To avoid to connect the interface reversely 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 reversely pls Change the connection wires between pin 2 and 3 2 Power supply HXJZ 877 uses DC power supply with voltage of 5V It can also share power with other equipment however the high quality power 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 Saving power model HXJZ 877 have three Power Saving models Awaken from Hardware Awaken from COM Port Awaken from Air The model can be set by RF Module software The user can choose Power Saving model the default model is
6. f 868 915MHz 5 High anti interference and low BER Bit error Rate Based on the GFSK modulation mode it adopts the efficient communication protocol T he actual bit error rate of 10 5 10 6 can be achieved when channel bit error rate is 6 Long transmission distance Within the range of visibility the reliable transmission distance is BER 10 3 1200bps gt 3000m when the antenna height is greater than 3m BER 10 3 9600bps 7 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 lt 10ms 8 Multi channel and speed The standard HXJZ 877 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 9 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 10 Intelligent data control a
7. nd the user doesn t need to prepare excessive programs Even for semi duplex communication the user doesn t need to prepare excessive programs only HXJZ 877 Mini Power Wireless Module User s Manual receiving transmitting the data from the interface HXJZ 877 will automatically complete the other operations such as transmission receiving conversion in the air control etc 11 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 12 Watchdog monitor Watchdog monitors the inner function so it can change the traditional product structure and improve the product reliability Application of HXJZ 877 1 Appearance figure TX RX indicator light Red TX RX Antenna socket e Green HXJZ 877 figure User interface 2 HX JZ 877 interface definition HXJZ 877 Mini Power Wireless Module User s Manual 1 User s interface HXJZ 877 have one interface of TTL RS232 RS485 user can choose one HXJZ 877 standard interface when the antenna upward the plastic socket gap upward from left to right 1 9 pin in turn as follows Remarks Jack space between is 2 0 mm Definition of connecting pins and connection method Item PIN Description Level User terminal Remarks no Connected to the terminal 1 SLE Sleep control input end Low level to sleep ee High level aw
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