CN210780767U

CN210780767U - Communication module based on LoRaWAN

Info

Publication number: CN210780767U
Application number: CN201921831087.1U
Authority: CN
Inventors: 钱建文; 谢接长; 凌晓华; 郑木勇
Original assignee: Guangzhou Vanvov Information Technology Co ltd
Current assignee: Guangzhou Vanvov Information Technology Co ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-06-16
Anticipated expiration: 2029-10-28

Abstract

The utility model provides a communication module based on LoRaWAN, LoRaWAN communication module includes multichannel transceiver, first radio frequency front end, second radio frequency front end, sends optimization module, receives optimization module, RF switch and antenna interface, multichannel transceiver is connected with first radio frequency front end and second radio frequency front end; the transmission optimization module comprises a power amplifier, and the power amplifier is respectively connected with the first radio frequency front end and the RF switch; the receiving optimization module comprises a low noise amplifier, and the low noise amplifier is respectively connected with the second radio frequency front end and the RF switch. Adopt the utility model discloses, can realize multichannel full duplex communication to can solve current communication module and have that transmitting power is low and received signal still has the shortcoming of great interference.

Description

Communication module based on LoRaWAN

Technical Field

The utility model relates to a wireless communication field especially relates to a communication module based on LoRaWAN.

Background

The LoRa is a long-distance low-power-consumption wireless communication technology below 1GHz, and a linear frequency modulation spread spectrum modulation technology is adopted, so that the network efficiency and the anti-interference performance are improved, and the reliable connection of the network is ensured.

LoRaWAN is an open standard that defines the communication protocol of the lpran chip-based LPWAN (low power wide area network) technology. The communication distance of the gateway running the LoRaWAN protocol is as long as 1.5 kilometers, the gateway is suitable for large-area network coverage and is mainly applied to scenes such as intelligent agriculture, intelligent cells, intelligent cities and the like.

However, most of the existing LoRaWAN communication modules are single-channel and half-duplex communication, module interfaces are stamp holes or other interfaces needing to be welded, the communication bandwidth of the modules is not enough, and the modules are inconvenient to deploy and install. In addition, the existing LoRaWAN communication module has the defects of low transmission power and large interference of received signals.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a LoRaWAN communication module is provided, can solve current LoRaWAN communication module and have that transmission power is low, received signal still has great interference and can not the shortcoming of full duplex communication.

The utility model provides a communication module based on LoRaWAN, LoRaWAN communication module includes multichannel transceiver, first radio frequency front end, second radio frequency front end, sends optimization module, receives optimization module, RF switch and antenna interface, multichannel transceiver is connected with first radio frequency front end and second radio frequency front end; the transmission optimization module comprises a power amplifier, and the power amplifier is respectively connected with the first radio frequency front end and the RF switch; the receiving optimization module comprises a low noise amplifier, and the low noise amplifier is respectively connected with the second radio frequency front end and the RF switch.

Preferably, the transmission optimization module further includes a first acoustic surface filter, and the first acoustic surface filter is respectively connected to the power amplifier and the RF switch.

Preferably, the transmission optimization module further includes a second acoustic surface filter, and the second acoustic surface filter is respectively connected to the power amplifier and the first rf front end.

Preferably, the receiving optimization module further includes a third acoustic surface filter, and the third acoustic surface filter is respectively connected to the low noise amplifier and the second radio frequency front end.

Preferably, the receiving optimization module further comprises a fourth sound table filter, and the fourth sound table filter is respectively connected with the low noise amplifier and the RF switch.

Preferably, the fourth acoustic surface filter is further connected to the first radio frequency front end.

Preferably, the communication module further comprises a Mini _ PCI-E interface, and the multi-channel transceiver is connected with an external hardware system through the Mini _ PCI-E interface.

Preferably, the multichannel transceiver is connected with the Mini _ PCI-E interface through the SPI.

Preferably, the multichannel transceiver is further connected with the Mini _ PCI-E interface in a mode of converting SPI into a USB interface in sequence.

Preferably, the multi-channel transceiver is further connected with the Mini _ PCI-E interface through a GPIO.

Implement the utility model has the advantages that:

the utility model discloses a communication module based on LoRaWAN, communication module includes multichannel transceiver, first radio frequency front end, second radio frequency front end, sends optimization module, receives optimization module, RF switch and antenna interface, can realize multichannel full duplex communication to can solve the shortcoming that wireless radio frequency chip transmission power is little and the receiving distance is close through sending optimization module, can reduce interference, filtering part mixed and disorderly signal through receiving optimization module.

Drawings

Fig. 1 is a diagram of a first embodiment of a LoRaWAN-based communication module provided by the present invention;

fig. 2 is a diagram of a second embodiment of a LoRaWAN-based communication module provided by the present invention;

fig. 3 is an interface schematic diagram of a communication module based on LoRaWAN provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the invention is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the invention.

As shown in fig. 1, the utility model provides a communication module's first embodiment based on LoRaWAN, communication module includes multichannel transceiver 1, first radio frequency front end 2, second radio frequency front end 3, sends optimization module 4, receives optimization module 5, RF switch 6 and antenna interface 7, multichannel transceiver 1 is connected with first radio frequency front end 2 and second radio frequency front end 3; the transmission optimization module 4 comprises a power amplifier 401, and the power amplifier 401 is respectively connected with the first radio frequency front end 1 and the RF switch 6; the receiving optimization module 5 includes a low noise amplifier 501, and the low noise amplifier 501 is connected to the second radio frequency front end 3 and the RF switch 6, respectively.

It should be noted that the utility model provides a communication module based on LoRaWAN can the data package of a plurality of frequency channels of concurrent receipt through multichannel transceiver 1, possesses the function of multichannel communication, can receive simultaneously and the transmitting signal. When transmitting signals, the first radio frequency front end 2 amplifies the transmission signals through the power amplifier 401, and transmits the signals through the antenna, so that the transmission power is improved, and the communication distance is increased. When receiving signals, the antenna receives the signals, then amplifies the received signals through the low-noise amplifier, and finally transmits the signals to the second radio frequency front end, so that the signal intensity of the received signals can be improved, and the signals can be accurately received and analyzed conveniently. Preferably, the multi-channel transceiver 1 uses an SX1301 chip, the first RF front end and the second RF front end are both SX1255 chips, the power amplifier is TRF37C37, the low noise amplifier is SPF5013Z, and the RF transceiver switch is RFSW1012, but is not limited thereto.

Communication module based on LoRaWAN mainly used carries out wireless data transmission with the LoRa node or with other LoRaWAN communication module, and MCU uploads the data that LoRaWAN communication module received to the high in the clouds server through the gateway again to can master the running state of LoRa node. Wherein, the loRa node includes that the loRa smoke is felt and loRa smart home etc..

As shown in fig. 2, the utility model provides a second embodiment of communication module based on LoRaWAN, send optimization module 4 still includes first acoustic table filter 402, first acoustic table filter 402 respectively with power amplifier 401 with RF switch 6 is connected. The first acoustic surface filter can filter out interference signals generated after the signals are amplified by the power amplifier, and the quality of the transmitted signals is improved.

Further, the transmission optimization module 4 further includes a second acoustic surface filter 402, and the second acoustic surface filter 402 is respectively connected to the power amplifier 401 and the first radio frequency front end 2. The interference signals generated by the first radio frequency front end and other devices after the signals are generated can be filtered by the second acoustic surface filter, and the quality of the transmitted signals is improved.

Preferably, the receiving optimization module 5 further includes a third acoustic surface filter 502, and the third acoustic surface filter 502 is respectively connected to the low noise amplifier 501 and the second rf front end 2. The third acoustic surface filter 502 can filter out interference signals generated after the signals are amplified by the low noise amplifier 501, and the quality of the received signals is improved.

Further, the receiving optimization module 5 further includes a fourth sound table filter 503, and the fourth sound table filter 503 is respectively connected to the low noise amplifier 501 and the RF switch 6. The fourth acoustic surface filter 503 can filter the interference signal in the received signal, thereby improving the quality of the received signal.

The first, second, and third acoustic surface filters are all HDF840a2-S6, but are not limited thereto.

Preferably, the fourth acoustic surface filter 503 is further connected to the first rf front end 2, that is, the signal received by the communication module is transmitted to the first rf front end 2 in addition to the second rf front end 3, which is equivalent to that the first rf front end is both the transmitting end and the receiving end.

As shown in fig. 3, the communication module further includes a Mini _ PCI-E interface 8, the multichannel transceiver 1 is connected to an external hardware system through the Mini _ PCI-E interface 8, the Mini _ PCI-E interface is used to be conveniently embedded into other hardware systems, and the installation is convenient, and the Mini _ PCI-E interface 8 supports hot plug access, thereby greatly facilitating the online expansion of system functions.

Preferably, the multichannel transceiver 1 is connected to the Mini _ PCI-E interface 8 through the SPI.

Preferably, the multichannel transceiver 1 is further connected with the Mini _ PCI-E interface in a mode of sequentially converting the SPI into the USB interface, and the SPI is converted into the USB interface chip 9, so that the practicability of the LoRaWAN communication module is further improved.

Further, the multi-channel transceiver 1 is also connected with the Mini _ PCI-E interface 8 through a GPIO. The GPIO pin is used for indicating the state of the multichannel transceiver, so that the MCU can use a polling or interrupt method to transmit and receive wireless signals to and from a register of the multichannel transceiver in time, and then judges whether to receive signals or transmit signals.

To sum up, the utility model provides a communication module based on LoRaWAN can solve current technical problem, can realize multichannel full duplex communication to can solve the shortcoming that wireless radio frequency chip transmission power is little and the receiving distance is close through sending optimization module 4, can reduce the interference through receiving optimization module 5, filtering part mixed and disorderly signal, in addition, still change USB interface chip 9 through Mini _ PCI-E interface 8 and SPI, further increased communication module's practicality.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the principle of the invention, and these modifications and decorations are also regarded as the protection scope of the present invention.

Claims

1. A communication module based on LoRaWAN is characterized in that the LoRaWAN communication module comprises a multichannel transceiver, a first radio frequency front end, a second radio frequency front end, a sending optimization module, a receiving optimization module, an RF switch and an antenna interface, wherein the multichannel transceiver is connected with the first radio frequency front end and the second radio frequency front end;

the transmission optimization module comprises a power amplifier, and the power amplifier is respectively connected with the first radio frequency front end and the RF switch;

the receiving optimization module comprises a low noise amplifier, and the low noise amplifier is respectively connected with the second radio frequency front end and the RF switch.

2. The LoRaWAN-based communication module of claim 1, wherein the transmit optimization module further comprises a first acoustic surface filter, the first acoustic surface filter being connected to the power amplifier and the RF switch, respectively.

3. The LoRaWAN-based communication module of claim 2, wherein the transmit optimization module further comprises a second acoustic surface filter, the second acoustic surface filter being connected to the power amplifier and the first radio frequency front end, respectively.

4. The LoRaWAN-based communication module of claim 1, wherein the receive optimization module further comprises a third acoustic surface filter, the third acoustic surface filter being connected to the low noise amplifier and the second radio frequency front end, respectively.

5. The LoRaWAN-based communication module of claim 4, wherein the receive optimization module further comprises a fourth saw filter, the fourth saw filter being connected to the low noise amplifier and the RF switch, respectively.

6. The LoRaWAN-based communication module of claim 5, wherein the fourth acoustic surface filter is further connected to the first radio frequency front end.

7. The LoRaWAN-based communication module of claim 1, wherein the communication module further comprises a Mini _ PCI-E interface, the multi-channel transceiver being connected to an external hardware system through the Mini _ PCI-E interface.

8. The LoRaWAN-based communication module of claim 7, wherein the multi-channel transceiver interfaces with the Mini _ PCI-E through the SPI.

9. The LoRaWAN-based communication module of claim 8, wherein the multi-channel transceiver is further connected to the Mini _ PCI-E interface sequentially via an SPI to USB interface.

10. The LoRaWAN-based communication module of claim 8, wherein the multi-channel transceiver is further connected to the Mini _ PCI-E interface through a GPIO.