CN102711293B - Wireless sensor network gateway - Google Patents

Abstract

The invention discloses a wireless sensor network gateway, which includes a 64-bit MC13213 microcontroller, a wireless transceiver chip nRF24L01, a first antenna circuit, a second antenna circuit, a switch circuit and a battery circuit. PTA7, PTA6, PTA5, PTA4, PTE1, and PTE0 of the MC13213 microcontroller are connected with CE, CSN, CSK, MOSI, MISO, and IRQ of the wireless transceiver chip nRF24L01 in turn to simulate SPI communication, and the MC13213 microcontroller is connected to the first antenna circuit And the switch circuit, the wireless transceiver chip nRF24L01 is connected with the second antenna circuit through the radio frequency interface, and the MC13213 microcontroller and the wireless transceiver chip nRF24L01 are powered by the power supply circuit. Through the above method, the present invention can realize the interconnection and intercommunication of two commonly used wireless sensor networks, and the original system based on Gaussian frequency shift keying modulation can be connected to the ZigBee network, thereby supporting standard protocols and flexible networking; the original The ZigBee network connects lower cost, technically simpler wireless sensor network systems.

Description

A wireless sensor network gateway

technical field

The invention relates to the field of design and manufacture of electronic communication equipment, in particular to a wireless sensor network gateway.

Background technique

With the development of the Internet of Things technology, the application of wireless sensor networks is becoming more and more extensive, and the wireless communication modulation/demodulation methods, link control, communication protocols, and networking methods in applications are also becoming more and more diverse. Connectivity is becoming increasingly important.

In the 2.4G ISM frequency band, nRF24L01 is based on Gaussian frequency shift keying modulation technology, with a maximum communication rate of 2Mb/s, easy to use, low price, and widely used; however, due to the lack of standard protocols, large-scale applications and networking When there are deficiencies. ZigBee technology is based on spread spectrum communication, has a standard protocol, and is easy to form a large-scale network. It is another wireless sensor network technology widely used in the 2.4G ISM frequency band; High, and the highest communication rate is 250kb/s.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a wireless sensor network gateway, which can realize the interconnection and intercommunication of two commonly used wireless sensor networks, and the original system based on Gaussian frequency shift keying modulation can be connected to the ZigBee network, Thus supporting standard protocols and flexible networking; the original ZigBee network connection is lower cost and technically simpler wireless sensor network system.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a wireless sensor network gateway, which includes a 64-bit MC13213 microcontroller, a wireless transceiver chip nRF24L01, a first antenna circuit, a second Two antenna circuits, switch circuits and battery circuits, the PTA7, PTA6, PTA5, PTA4, PTE1, PTE0 of the MC13213 microcontroller are connected with the CE, CSN, CSK, MOSI, MISO, and IRQ of the wireless transceiver chip nRF24L01 in turn to simulate the SPI For communication, the MC13213 microcontroller is connected with the first antenna circuit and the switch circuit, the wireless transceiver chip nRF24L01 is connected with the second antenna circuit through the radio frequency interface, and both the MC13213 microcontroller and the wireless transceiver chip nRF24L01 are powered by the power supply circuit.

Preferably, the channel setting switches S0, S1, S2, and S3 of the switch circuit are sequentially connected to PTC0, PTC1, PTC2, and PTC3 of the MC13213 microcontroller.

Preferably, the rate selection switch S4 of the switch circuit is connected to the PTC4 of the MC13213 microcontroller.

The beneficial effect of the present invention is: a kind of wireless sensor network gateway of the present invention can realize the intercommunication of two kinds of commonly used wireless sensor networks, the original system based on Gaussian frequency shift keying modulation can access ZigBee network, Thus supporting standard protocols and flexible networking; the original ZigBee network connection is lower cost and technically simpler wireless sensor network system.

Description of drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a wireless sensor network gateway of the present invention;

The marks of each part in the accompanying drawings are as follows:

1. MC13213 microcontroller; 2. Wireless transceiver chip nRF24L01; 3. First antenna circuit; 4. Second antenna circuit; 5. Switch circuit; 6. Battery circuit; 51. Channel setting switch; 52. Speed selection switch.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

Please refer to Fig. 1, the embodiment of the present invention comprises:

A wireless sensor network gateway, the wireless sensor network gateway includes a 64-bit MC13213 microcontroller 1, a wireless transceiver chip nRF24L012, a first antenna circuit 3, a second antenna circuit 4, a switch circuit 5 and a battery circuit 6, the PTA7, PTA6, PTA5, PTA4, PTE1, PTE0 of MC13213 microcontroller 1 are connected with CE, CSN, CSK, MOSI, MISO, IRQ of wireless transceiver chip nRF24L01 2 in turn to simulate SPI communication, and MC13213 microcontroller 1 is connected with The first antenna circuit 3 and the switch circuit 5, the wireless transceiver chip nRF24L01 2 is connected with the second antenna circuit 4 through the radio frequency interface, the MC13213 microcontroller 1 and the wireless transceiver chip nRF24L01 2 are all powered by the power supply circuit 6; the switch circuit 5 Channel setting switch 51 S0, S1, S2, S3 is connected with PTC0, PTC1, PTC2, PTC3 of MC13213 microcontroller successively; The rate selection switch 52 S4 of described switching circuit 5 is connected with PTC4 of MC13213 microcontroller.

The working mode of the wireless sensor network gateway of the present invention is as follows: the radio frequency transceiver system with nRF24L01 as the core is used as the peripheral equipment of MC13213, and the two are connected through the SPI interface. Switches s0~s3 are used to select ZigBee communication channel (channel 11~26), s4 is used to select nRF24L01 communication rate (2Mb/s or 1Mb/s)

The MC13213 in the gateway involves two functions: the first is ZigBee communication, and the second is as the controller of the nRF24L01 system. The MC13213 microcontroller can be used as a ZigBee communication node after connecting a simple antenna system and power supply and other peripheral circuits. MC13213 simulates the SPI interface through its PTA port and PTE port, and connects with the wireless transceiver chip nRF24L01.

When some circuits of the wireless transceiver chip nRF24L01 are powered on and reset, the MC13213 microcontroller completes the initialization of the wireless transceiver chip nRF24L01; when it is working, the MC13213 microcontroller removes the ZigBee frame header and frame tail from the data received wirelessly, and writes it through the SPI interface. Enter the wireless transceiver chip nRF24L01; when the wireless transceiver chip nRF24L01 receives wireless data, it triggers the MC13213 microcontroller through an interrupt, and the MC13213 microcontroller reads the data through the SPI interface, adds the ZigBee frame header and frame tail, and forwards it wirelessly.

There are two circular queues in the RAM of the MC13213 microcontroller, which are used as the wireless transceiver chip nRF24L01 sending data buffer and ZigBee sending data buffer to adapt to the speed mismatch between the two communication systems, and the wireless channel may be interrupted due to interference. Delayed delivery, etc.

The invention is a wireless sensor network gateway, which can realize the interconnection and intercommunication of two commonly used wireless sensor networks. The original system based on Gaussian frequency shift keying modulation can be connected to the ZigBee network, thereby supporting standard protocols and flexible group network; the original ZigBee network connection lower cost, technically simpler wireless sensor network system.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (2)

1. A wireless sensor network gateway, characterized in that: the wireless sensor network gateway comprises 64-bit MC13213 microcontrollers, wireless transceiver chip nRF24L01, a first antenna circuit, a second antenna circuit, a switch circuit and a battery circuit, PTA7, PTA6, PTA5, PTA4, PTE1, and PTE0 of the MC13213 microcontroller are connected with CE, CSN, CSK, MOSI, MISO, and IRQ of the wireless transceiver chip nRF24L01 in turn to simulate SPI communication, and the MC13213 microcontroller is connected with the first The antenna circuit and the switch circuit, the wireless transceiver chip nRF24L01 is connected to the second antenna circuit through the radio frequency interface, the MC13213 microcontroller and the wireless transceiver chip nRF24L01 are powered by the power supply circuit, the channel setting switches S0, S1, S2, S3 of the switch circuit Connect with PTC0, PTC1, PTC2, PTC3 of MC13213 microcontroller in turn. 2. A wireless sensor network gateway according to claim 1, characterized in that: the rate switch S4 of the switch circuit is connected to the PTC4 of the MC13213 microcontroller.

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