CN104601417A - ZIGBEE technology based wireless on-off controller and method - Google Patents
ZIGBEE technology based wireless on-off controller and method Download PDFInfo
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Abstract
The invention designs a ZIGBEE technology based wireless on-off controller for controlling various intelligent home devices. The controller comprises ZIGBEE radio frequency chips for controlling the intelligent home devices through ZIGBEE application protocols. According to another embodiment, a wireless on-off control system is provided and is arranged in a network formed by the intelligent home devices to be used for integrating and controlling the intelligent home devices. The system comprises a radio network gateway and a plurality of control nodes in wireless connection with the radio network gateway. The radio network gateway comprises a ZIGBEE upper node unit for building a network and analyzing protocols and transmits data to the control nodes through the ZIGBEE application protocols. The control nodes comprise ZIGBEE radio frequency chips for configuring parameters of the devices of the control nodes and performing broadcasting through the radio network gateway regularly, so that the device states can be searched and controlled in real time.
Description
Technical field
The embodiment of the present invention is building block technique about ZIGBEE wireless multifunctional switch control rule and application process, realizes long-range Smart Home Radio Control Function.
Background technology
Product in the market about Smart Home is also a lot, of a great variety, and application is complicated, and wireless communication technology is immature, and communication reliability and real-time can not get ensureing, and network node quantity is few, and node is many, and blocking up seriously appears in network.The invention mainly solves the problem, miscellaneous product set in an application system, and modular operation, use simple, highly versatile, an order gets final product handoff functionality type, be suitable for applying in different products, realize real multi-functional control.And utilize ZIGBEE technology to realize two-forty, remote, many device nodes, the feature such as communicate reliable and stable, non-directional, thus greatly improve home intelligence degree.
What current like product on the market mostly adopted is infrared technique or small wireless technology.To have Application comparison in the household appliances of remote control general traditional for infrared technique, but communication distance is short, data communication is very dangerous, very large by on-the-spot environmental impact, directivity is single, and can not barrier be penetrated, must be very low at visual range communication, traffic rate, and success rate is not very high.Small wireless technology is radio communication dedicated network construction mode, carries out data double-way transmission with ISM or special frequency, exempts from wiring.Due to the independently developed proprietary protocol of communication protocol Shi Ge producer of small wireless networking, do not have unified technical standard, the interoperability of equipment is poor, and interconnect difficulty.In addition, the routing algorithm of small wireless networking is too simple, convergence rate not even recurrence slowly often, also there is bottleneck in system scale and extended capability, the Anti-Jamming Technique that small wireless adopts at bottom is limited, so for the Wireless Application Environment of current changeable complexity, certain communication success rate can be reduced.And traffic rate is low, response speed is slow, affects real-time report and the control of data, causes the sensation controlling to delay to people.
Summary of the invention
The embodiment of the present invention solves aforementioned drawback, designing a kind of wireless switch controller based on ZIGBEE technology, for controlling multiclass intelligent home device, comprising the ZIGBEE radio frequency chip being controlled these intelligent home devices by ZIGBEE application protocol.
In one embodiment, described ZIGBEE radio frequency chip selects EM357 cake core, built-in 32 arm processors.
In one embodiment, described ZIGBEE radio frequency chip electric current is in the dormant state set to 0.7 μ A.
In one embodiment, described ZIGBEE application protocol is based on object dictionary (OD) technology, arranges the parameter of intelligent home device and state and controls.
In another embodiment, a kind of wireless switching control system is provided, be arranged in the network of an intelligent home device composition, for integrated and control multiclass intelligent home device, it is made up of several Controlling vertex of radio network gateway and wireless connections with it, wherein said radio network gateway comprises a ZIGBEE host node equipment, for building network and protocol analysis, and transmits data by ZIGBEE application protocol to Controlling vertex; Described Controlling vertex comprises ZIGBEE radio frequency chip, and for configuring the parameter of Controlling vertex place equipment, and timing is undertaken broadcasting with real-time query and the state controlling place equipment by described radio network gateway.
In one embodiment, described ZIGBEE application protocol is based on object dictionary (OD) technology, arranges the parameter of described radio network gateway and Controlling vertex and state and controls.
In one embodiment, the real time status information of Controlling vertex is read by READ_OD command frame, wherein according to the corresponding command format of the different choice of the identifier of the Controlling vertex of required access; The parameter of Controlling vertex is write to carry out Long-distance Control, wherein according to the corresponding command format of the different choice of the identifier of the Controlling vertex of required access by WRITE_OD command frame.
In one embodiment, described identifier selects MAC Address.
In another embodiment, the control method of wireless switch controller, for controlling multiclass intelligent home device, comprising: carry out initialization to a ZIGBEE radio frequency chip, and carry out initialization to radio network gateway; Comprise further: reset watchdog unit (WDT) in described ZIGBEE radio frequency chip; Detect serial ports and whether connect time-out, if so, then produce a serial data process event; If not, then a wireless data processing event is produced; Produce Wireless Data Protocol process event; Detect and whether joined in a ZIGBEE application protocol.
In one embodiment, the process event in described step includes: judge whether there are data in delayed delivery buffer area in ZIGBEE radio frequency chip, if so, then sends data by ZIGBEE application protocol; If not, then device type and the parameter of this Controlling vertex is judged; The state of this Controlling vertex is set by the outside input unit of Controlling vertex.
The embodiment of the present invention can realize the function controlling plurality of devices, practical shirtsleeve operation, as long as amendment parameter just can realize the function of distinct device.Have for output signal equipment: electrically driven curtain, electric curtain, electric driven glass, lamp switch, desk lamp with dimmer switch switch, audible-visual annunciator etc.Have for input signal equipment: gate inhibition's signal, human body heat-releasing transducer, carbon monoxide transducer, Smoke Sensor and scene control etc.Application process comprises device definition and configuration, and how to realize long-range reading and control.
The embodiment of the present invention has mainly gathered tens kinds of functions of the equipments.Comprise for output signal equipment: electrically driven curtain, electric curtain, electric driven glass, lamp switch, desk lamp with dimmer switch switch, audible-visual annunciator etc.For input signal equipment: gate inhibition's signal, human body heat-releasing transducer, carbon monoxide transducer, Smoke Sensor and scene control etc.Technological innovation composition is divided into: the ZIGBEE data transmit-receive module hardware composition 1, on wireless multifunctional on-off controller equipment.2. wireless multifunctional controller system framework and software protocol and flow process.2, the definition of multifunction switch movement controller and application.
Embodiment
What multifunction switch controller equiment adopted is leading ZIGBEE radio frequency chip.Such as chip chooses the EM357 chip of Silincon company, and chip possesses 32 ARM CortexTM-M3 processors of industry-leading.
The invention provides a kind of wireless switching control system, be arranged in the network of an intelligent home device composition, for integrated and control multiclass intelligent home device, it is made up of several Controlling vertex of radio network gateway and wireless connections with it, wherein said radio network gateway comprises a ZIGBEE host node equipment, for building network and protocol analysis, and transmit data by ZIGBEE application protocol to Controlling vertex; Described Controlling vertex comprises ZIGBEE radio frequency chip, and for configuring the parameter of Controlling vertex place equipment, and timing is undertaken broadcasting with real-time query and the state controlling place equipment by described radio network gateway.
In one embodiment, described ZIGBEE application protocol is based on object dictionary (OD) technology, arranges the parameter of described radio network gateway and Controlling vertex and state and controls.
In one embodiment, the real time status information of Controlling vertex is read by READ_OD command frame, wherein according to the corresponding command format of the different choice of the identifier of the Controlling vertex of required access; The parameter of Controlling vertex is write to carry out Long-distance Control, wherein according to the corresponding command format of the different choice of the identifier of the Controlling vertex of required access by WRITE_OD command frame.
In one embodiment, described identifier selects MAC Address.
In another embodiment, the control method of wireless switch controller, for controlling multiclass intelligent home device, comprising: carry out initialization to a ZIGBEE radio frequency chip, and carry out initialization to radio network gateway; Comprise further: reset watchdog unit (WDT) in described ZIGBEE radio frequency chip; Detect serial ports and whether connect time-out, if so, then produce a serial data process event; If not, then a wireless data processing event is produced; Produce Wireless Data Protocol process event; Detect and whether joined in a ZIGBEE application protocol.
In one embodiment, the process event in described step includes: judge whether there are data in delayed delivery buffer area in ZIGBEE radio frequency chip, if so, then sends data by ZIGBEE application protocol; If not, then device type and the parameter of this Controlling vertex is judged; The state of this Controlling vertex is set by the outside input unit of Controlling vertex.
Embedded stable, the reliable ZIGBEE protocol stack of this module, communication range is wide, and network reliability is high.
This modular design is the extra small module of volume, and be the paster encapsulation of stamp hole, overall dimension is only 18mm*14.5mm*3.75mm.Adopt the manufacture of SMT technology, module is easy to use, very save space.
This module communication protocol meets international standard ZIGBEE/IEEE 802.15.4 standard, can with the device interoperabilities such as the Smart Home of other producers.
This module quiescent current only only has 0.7 μ A, can meet the demand of user for low cost, power consumption wireless sensor network, and battery at most can with 3 years.
ZIGBEE module adopts ISM 2.4GHz frequency range.This be global general-use exempt from occupancy permit frequency ISM, be free frequency range;
This module supports 16 communication ports, traffic rate 250kbps; Adopt direct sequence spread spectrum (DSSS) technology and O-QPSK modulation system, CSMA – CA (csma/conflict avoidance) communication mode, antijamming capability is strong.MAC layer supports 64 bit address space, and the MAC Address whole world is unique.
1.ZigBee multifunction switch control system is made up of the equipment (hereinafter referred to as Controlling vertex) of a ZigBee management node (hereinafter referred to as radio network gateway) and the some ZigBee of comprising Multifunction open gateway controller routing modules.
2. gateway is communicated or WiFi communication by standard serial port with ZigBee function software, and gateway has building network and protocol analysis and transmits the function of data.
3. switch control node is built in controlled plant, and typical controlled plant comprises ZigBee socket, ZigBee lamp switch, ZigBee electrically driven curtain, ZigBee Temperature Humidity Sensor etc.After radio network gateway powers on, automatically complete networking, ZigBee management software only need configure correct system parameters by serial ports or WiFi, and timing is broadcasted by radio network gateway, can real-time query and the state controlling all devices.
4. this application agreement adopts object dictionary technology (Object Dictionary, hereinafter abbreviated as OD), arranges the parameter of radio network gateway itself and Controlling vertex and state and controls.Object dictionary (OD) technology is the data management technique generally used in communication network, while system provides excellent interoperability and expandability, ensure that the degree of freedom and the flexibility of developer to greatest extent.The essence of object dictionary technology unifies layout according to the parameter of mode to internal system of standard, makes these inner parameters can according to the mode of standard from external reference.
5. the OD value reading Controlling vertex is its parameter of inquiry and state (such as ZigBee lamp switch is bright/state of going out), the OD value writing Controlling vertex is and arranges its parameter or state (such as by representing in lamp switch module OD value that the byte value of light on and off state is set to 1 expression and turns on light, being set to 0 expression and turning off the light).OD adopts the mode of index+subindex to conduct interviews, and OD index 2 byte integer represent, span is that 0-65535, OD subindex 1 byte integer represents, 0-255, concrete span depending on OD definition and change.OD subindex represents that needs read or arrange the sequence number of the field in OD structure, and 0 represents whole OD structure, and 1 represents first character section, so analogizes.It should be noted that subindex must be more than or equal to 1 when writing OD.
6.ZigBee management software to be communicated with COO by standard RS232 serial ports or WiFi read-write operation and realizes network status query and management, the frame structure of set form is adopted during communication, every frame data are made up of frame head+frame length+data+School Affairs+postamble five part, wherein frame head, postamble is respectively a byte, gets fixed value, is respectively 0x2A and 0x23, frame length byte is checked and is a byte, and value is obtain after 256 remainders after valid data are added.
7. adopt Read_OD order for reading multifunctional controller real time status information
For being read the numerical value of parameter by OD, command id: 0x01.According to the difference of access destination node address format, can use following command format: command format, for other nodes, in order, destination address territory uses MAC Address, Number=0x01:
Frame is the elementary cell of transmission information
| 1 | 1 | 8 | 8 | 2 | 1 |
| 0x01 | 0x01 | Src. Addr | MAC Addr | Index | Sub |
8. adopt Write_OD command frame format writing controller parameter, implement the Long-distance Control to equipment such as lamp switches
For the numerical value by OD write parameters, command id: 0x02.According to the difference of access destination node address format, following command format can be used: command format, for other nodes, in order, destination address territory uses MAC Address, Number=0x01: define equipment information parameter, carry out Version Control and management, support remote upgrade function, performing remote upgrade if desired can remotely modifying program.
The OD index of facility information parameter is 0, uses this parameter of Read_OD command access, can the details of equipment.It should be noted that all parameters of this parameter are all read-only, Write_OD operation will be rejected access.Its organization definition is as follows:
AucSoftware_Version [4]: software version number, needs upgrading for judging whether when remote upgrade.
AucHardware_Version [4]: hardware version numbers, identifies the hardware version of current device.
AucOD_Version [4]: OD version number, for identifying that current OD describes version.
AucManufacture [12]: the title of manufacturer.
UiProfile_ID: professional etiquette identifies
Define grid parameter, for distinguishing different networks, avoids co-channel interference effectively.
The OD index of network parameter is 1001 (0x03E9), and be mainly used in the every attribute configuring ZigBee-network, its organization definition is as follows:
UcCurrent_Channel is provided with the current passage used, span 11-26.The communication frequency of ZigBee equipment will be changed to the write operation of this parameter.After this parameter is modified, come into force after node reset.
Whether the current communication of bCompress_Enable optimum configurations employs data compression technique, temporarily unrealized.
Whether the current communication of bEncrypt_Enable optimum configurations employs data encryption technology, temporarily unrealized.
The transmitted power of cTransmit_Power optimum configurations node.Because therefore the transmitted power of most of RF chip by software adjustment, can change this parameter, just its transmitted power can be regulated.Span is :-32dBm – 3dBm
AucPWD [16] is 128 passwords for encrypting.
The network identity (PAN ID) of the current ZigBee subnet of uiPAN_ID optimum configurations.After this parameter is modified, come into force after node reset.
The affiliated group of ucGroup_ID optimum configurations current device, uses when the data sent use group to carry out addressing.Temporarily do not support group addressing system.
AucExtendPanID parameter is for distinguishing the heterogeneous networks be operated under same frequency further.This parameter is introduced in agreement after ZigBeePRO2007.
UcEnable_EEPROM parameter is used for arranging current whether permission and uses outside EEPROM to realize program upgrade.
Multifunctional controller general parameter defines: the OD index of this parameter is 1006 (0x03EE), and multifunctional controller is mainly used in the basic implementation strategy configured, and UART port attribute.
UiUART_Frame_Gap arranges the time interval between serial ports frame and frame, and for judging whether to receive complete bag data when receiving data from serial ports, unit is millisecond.Need the value that this parameter is set according to different baud rates.Such as under 1200 baud rates, the value of this parameter should be greater than 50ms.
UcApplication, ucConnection_To_Meter: temporarily do not use
UcRandom_Delay_Scale is for after being arranged on and receiving order that broadcast mode sends, and to random delay during this command response, span is as follows
=0: do not carry out random delay;
1-15: random delay, and after acquisition random number, this figure place represented by data shift right numerical value, the numerical value obtained is as the millisecond number of random delay.
UiIndex: the equipment large class of this parameter for configuring Smart Home, i.e. OD type.Such as the OD of Multifunction open gateway controller is 4010.
UcType: this parameter is for configuring with concrete device types different under an OD, and such as touch three road lamp switchs and be configured to 0x07, touching two street light allocation is 0x06, and the configuration of other equipment is as table 1 and table 2.
UcUpLoadInterval: this parameter is used for arranging node and reports the time interval, can revise, unit is minute.
UcSEDeviceLoad: define this parameter for set device positional information.Distinguish parlor and bedroom equipment etc.
UcSEDeviceMode: the mode of operation of equipment.
Multifunction switch movement controller defines: for equipment such as simple switch control rule and signal inputs, the unified structure body of the on-off controller of definition multi-purpose function, reduces the workload increase problem of the research and development to same category of device access multiple in intelligent domestic system, hardware, software.The OD index of this parameter is 4010, is mainly used in the basic implementation strategy of deploy switch.By the reading to index, the state of inquiry or control switch.
Int8u ucDeviceType; // 0-Null; 1-0x7f output equipment; 0x81-0xff inputs serial equipment
1-0x7f is for output signal equipment: electrically driven curtain, electric curtain, electric driven glass, lamp switch, lamp dimmer switch etc.
Table 1
In yet another aspect: 0x81-0xff is for input signal equipment: human body heat-releasing transducer, carbon monoxide transducer, Smoke Sensor etc.
| 0x81 | 0x82 | 0x83 | 0x85 |
| Human body heat-releasing | Carbon monoxide | Smoke Sensor | Old scene control |
Table 2
The application process of Multifunction open gateway controller in intelligent domestic system: 1. utilize multifunctional controller parameter OD index 1006, configure the device type that it needs to connect, such as: electrically driven curtain, electric curtain, electric driven glass, lamp switch, lamp dimmer switch, audible-visual annunciator etc.; 2. utilize multifunctional controller parameter OD index 1006, can the communication baud rate of configuration device, operating state, and the parameter such as positional information; 3. utilize multifunctional controller parameter OD index 1001, configure or revise presetting network parameter, after powering on, automatically can add network; 4. module completed real time data after powering on and reports in 20 seconds.Comprise device type, operating state, signal strength signal intensity, switching value information or state information etc.; 5. controller has timing reporting functions, and the time interval that timing reports can be arranged in 1006 equipment preset parameter OD, and the time simultaneously reported also can adjust; 6. controller can respond the data of broadcasting command in time.After responding basic broadcast frame order, in 10 seconds, report 4010 switching-state information frames; 7. in couple OD, multiple parameter reads and write operation function.Namely the on off state of lamp can be controlled, the folding condition of curtain, the information such as the lifting of electric curtain by real time remote.The warning message of a magnetic and audible-visual annunciator can be received in real time; 8. for the equipment needing gateway to check order, the equipment such as such as fuel gas alarm, report alert data by alarm, if gateway is countless according to confirmation in setting-up time, then alarm can resend data latency confirmation, and the number of times of data re-transmitting and the time interval are for arranging.
ZIGBEE provides data integrity inspection and authentication functions, adopts advanced encryption standard-128 (AES-128) cryptographic algorithm.Network layer supports complicated TOPO structure: star-like, tree-like, netted and hybrid network, each subnet ALARA Principle 65535 nodes, each node has the network address of 16.There is powerful and stable network protocol stack, automatically can set up, repair, route optimization function.From technical standpoint analysis, towards wireless sensing with control the ZIGBEE technology apply, use freely, the feature such as antijamming capability is strong, speed is moderate, cost is low, low in energy consumption, network capacity is large, penetration capacity is strong, omnirange communication, time delay is short, transmission is reliable, construction requirement is low determine and have more dominance than other technologies.
Claims (10)
1. based on the wireless switch controller of ZIGBEE technology, for controlling multiclass intelligent home device, it is characterized in that: comprise the ZIGBEE radio frequency chip being controlled these intelligent home devices by ZIGBEE application protocol.
2. the wireless switch controller based on ZIGBEE technology according to claim 1, is characterized in that: described ZIGBEE radio frequency chip selects EM357 cake core, built-in 32 arm processors.
3. the wireless switch controller based on ZIGBEE technology according to claim 1, is characterized in that: described ZIGBEE radio frequency chip electric current is in the dormant state set to 0.7 μ A.
4. the wireless switch controller based on ZIGBEE technology according to claim 1, is characterized in that: described ZIGBEE application protocol is based on object dictionary (OD) technology, arranges the parameter of intelligent home device and state and controls.
5. wireless switching control system, be arranged in the network of an intelligent home device composition, for integrated and control multiclass intelligent home device, it is characterized in that: be made up of several Controlling vertex of radio network gateway and wireless connections with it, wherein said radio network gateway comprises a ZIGBEE host node equipment, for building network and protocol analysis, and transmit data by ZIGBEE application protocol to Controlling vertex; Described Controlling vertex comprises ZIGBEE radio frequency chip, and for configuring the parameter of Controlling vertex place equipment, and timing is undertaken broadcasting with real-time query and the state controlling place equipment by described radio network gateway.
6. wireless switching control system according to claim 5, is characterized in that: described ZIGBEE application protocol is based on object dictionary (OD) technology, arranges the parameter of described radio network gateway and Controlling vertex and state and controls.
7. wireless switching control system according to claim 6, is characterized in that: the real time status information being read Controlling vertex by READ_OD command frame, wherein according to the corresponding command format of the different choice of the identifier of the Controlling vertex of required access; The parameter of Controlling vertex is write to carry out Long-distance Control, wherein according to the corresponding command format of the different choice of the identifier of the Controlling vertex of required access by WRITE_OD command frame.
8. wireless switching control system according to claim 7, is characterized in that: described identifier selects MAC Address.
9. the control method of wireless switch controller, for controlling multiclass intelligent home device, comprising: carry out initialization to a ZIGBEE radio frequency chip, and carry out initialization to radio network gateway; It is characterized in that comprising further: reset watchdog unit (WDT) in described ZIGBEE radio frequency chip; Detect serial ports and whether connect time-out, if so, then produce a serial data process event; If not, then a wireless data processing event is produced; Produce Wireless Data Protocol process event; Detect and whether joined in a ZIGBEE application protocol.
10. the control method of wireless switch controller according to claim 9, it is characterized in that the process event in described step includes: judge whether there are data in delayed delivery buffer area in ZIGBEE radio frequency chip, if so, then data are sent by ZIGBEE application protocol; If not, then device type and the parameter of this Controlling vertex is judged; The state of this Controlling vertex is set by the outside input unit of Controlling vertex.
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