CN213152040U

CN213152040U - LORA communication module

Info

Publication number: CN213152040U
Application number: CN202022500319.4U
Authority: CN
Inventors: 应灵洁
Original assignee: Hangzhou Hecheng Energy Technology Co ltd
Current assignee: Hangzhou Hecheng Energy Service Co.,Ltd.
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-05-07
Anticipated expiration: 2030-11-03

Abstract

The utility model provides a LORA communication module, including microcontroller MCU module, SX1278 chip and its radio frequency circuit, radio frequency antenna, microcontroller MCU module, SX1278 chip and its radio frequency circuit, radio frequency antenna electricity are connected, microcontroller MCU module is equipped with the SPI interface that is used for connecting the SX1278 chip, the SPI interface still is used for connecting LORA terminal equipment; and the microcontroller MCU module transmits data to be transmitted to the SX1278 chip and the radio frequency circuit thereof.

Description

LORA communication module

Technical Field

The utility model belongs to the technical field of the loRa spread spectrum communication, especially, relate to a LORA communication module.

Background

LoRa is a super long distance wireless transmission scheme based on spread spectrum technology proposed by Semtech corporation in America, and adopts linear frequency modulation spread spectrum modulation technology, so that the low power consumption characteristic identical to FSK (frequency shift keying) modulation is realized, the communication distance is obviously increased, and meanwhile, the network efficiency is improved and the interference is eliminated. In view of lower power consumption and longer transmission distance of the LoRa spread spectrum communication technology, the LoRa spread spectrum communication technology is widely applied to the application fields of Internet of things such as water, electricity and gas heating meter centralized reading, intelligent parking lot management systems, intelligent agriculture, intelligent cities, industrial remote data acquisition and the like.

The existing LoRa modules are mostly integrated in each device in a chip form, so that the LoRa module of old equipment needs to be replaced by the whole equipment for upgrading, the cost is high, and the upgrading is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem and providing a LORA communication module.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an LORA communication module comprises a microcontroller MCU module, an SX1278 chip, a radio frequency circuit of the chip, and a radio frequency antenna, wherein the microcontroller MCU module, the SX1278 chip, the radio frequency circuit of the chip, and the radio frequency antenna are electrically connected, the microcontroller MCU module is provided with an SPI interface used for connecting the SX1278 chip, and the SPI interface is also used for connecting LORA terminal equipment; the microcontroller MCU module transmits data to be transmitted to the SX1278 chip and the radio frequency circuit thereof, the SX1278 chip and the radio frequency circuit thereof process and convert the data to be transmitted into electromagnetic waves, and the radio frequency antenna transmits the electromagnetic waves to the wireless communication module of other LORA terminal equipment; or the radio frequency antenna receives electromagnetic waves sent by other LORA communication modules, the SX1278 chip and the radio frequency circuit thereof process and convert the electromagnetic waves received by the radio frequency antenna into digital signals, and the microcontroller MCU module sends the digital signals to the LORA terminal equipment in a serial port mode.

Preferably, the SX1278 chip is electrically connected to an RF switch chip PE4259, the RF circuit converts data processing to be transmitted into electromagnetic waves through an internal circuit of the SX1278 chip and an internal circuit of the RF switch chip PE4259, or the RF circuit converts electromagnetic waves received by the RF antenna into digital signals through an internal circuit of the SX1278 chip and an internal circuit of the RF switch chip PE 4259.

After the technical scheme is adopted, the utility model has the advantages of as follows:

the microcontroller MCU module is provided with an SPI (serial peripheral interface) which is a high-speed synchronous serial port, and on one hand, the SPI is used for data signal transmission between the microcontroller MCU module and the SX1278 chip; on the other hand, the SPI interface can connect microcontroller MCU module and computer, and the computer can revise microcontroller MCU module built-in procedure, and the SPI interface can also connect microcontroller MCU module and LORA terminal equipment for communication between LORA terminal equipment and other LORA terminal equipment is realized as the communication module of LORA terminal equipment to the LORA communication module.

The SX1278 chip adopts a LoRaTM spread spectrum modulation frequency hopping technology, the communication distance and the receiving sensitivity of the chip are far beyond the current FSK and GFSK modulation, and a plurality of transmitted signals occupy the same channel without being influenced, the transmission distance can be greatly prolonged by using the module, the coverage range can reach 15 kilometers in a sparse environment, and the coverage range can reach more than 3 kilometers in a dense environment, so that a relay device and a complex communication infrastructure are not needed. Due to the fact that the transmission distance is increased, the use of the repeaters can be greatly reduced, the system design is simplified, and therefore cost is greatly reduced. The module also enhances the anti-interference performance of signals, and compared with the traditional mode, the data transmission is more stable.

Drawings

Fig. 1 is a schematic structural diagram of an LORA communication module according to the present invention;

in the figure:

1-a microcontroller MCU module; 2-SX1278 chip; 3-radio frequency antenna.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, an LORA communication module includes microcontroller MCU module 1, SX1278 chip 2 and its radio frequency circuit, radio frequency antenna 3, microcontroller MCU module 1, SX1278 chip and 2 its radio frequency circuit, radio frequency antenna 3 electricity are connected, microcontroller MCU module 1 is equipped with and is used for connecting SX1278 chip 2's SPI interface, the SPI interface still is used for connecting LORA terminal equipment.

The microcontroller MCU module 1 transmits data to be transmitted to an SX1278 chip 2 and a radio frequency circuit thereof, the SX1278 chip 2 and the radio frequency circuit thereof process and convert the data to be transmitted into electromagnetic waves, and the radio frequency antenna 3 transmits the electromagnetic waves to wireless communication modules of other LORA terminal equipment; or the radio frequency antenna 3 receives electromagnetic waves sent by other LORA communication modules, the SX1278 chip 2 and the radio frequency circuit thereof process and convert the electromagnetic waves received by the radio frequency antenna into digital signals, and the microcontroller MCU module 1 sends the digital signals to the LORA terminal equipment in a serial port mode.

The SX1278 chip 2 is electrically connected with an RF switch chip PE4259, the RF circuit processes and converts data to be transmitted into electromagnetic waves through an internal circuit of the SX1278 chip and an internal circuit of the RF switch chip PE4259, or the RF circuit processes and converts electromagnetic waves received by the RF antenna 3 into digital signals through an internal circuit of the SX1278 chip and an internal circuit of the RF switch chip PE 4259.

The microcontroller MCU module 1 is provided with an SPI (serial peripheral interface) which is a high-speed synchronous serial port, and on one hand, the SPI is used for data signal transmission between the microcontroller MCU module 1 and an SX1278 chip 2; on the other hand, the SPI interface can be connected microcontroller MCU module 1 and computer, and the computer can revise microcontroller MCU module 1 and embed the procedure, and the SPI interface can also be connected microcontroller MCU module 1 and LORA terminal equipment for the communication between LORA terminal equipment and other LORA terminal equipment is realized as the communication module of LORA terminal equipment to the LORA communication module.

The SX1278 chip 2 adopts a LoRaTM spread spectrum modulation frequency hopping technology, the communication distance and the receiving sensitivity of the chip far exceed the current FSK and GFSK modulation, and a plurality of transmitted signals occupy the same channel and are not influenced, the transmission distance can be greatly prolonged by using the module, the coverage range can reach 15 kilometers in a sparse environment, and the coverage range can reach more than 3 kilometers in a dense environment, so that a relay device and a complex communication infrastructure are not needed. Due to the fact that the transmission distance is increased, the use of the repeaters can be greatly reduced, the system design is simplified, and therefore cost is greatly reduced. The module also enhances the anti-interference performance of signals, and compared with the traditional mode, the data transmission is more stable.

In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims

1. An LORA communication module is characterized by comprising a microcontroller MCU module (1), an SX1278 chip (2), a radio frequency circuit of the chip and a radio frequency antenna (3), wherein the microcontroller MCU module (1), the SX1278 chip (2), the radio frequency circuit of the chip and the radio frequency antenna (3) are electrically connected, the microcontroller MCU module (1) is provided with an SPI interface used for connecting the SX1278 chip (2), and the SPI interface is also used for connecting LORA terminal equipment; the MCU module (1) transmits data to be transmitted to an SX1278 chip (2) and a radio frequency circuit thereof, the SX1278 chip (2) and the radio frequency circuit thereof process the data to be transmitted and convert the data into electromagnetic waves, and the radio frequency antenna (3) transmits the electromagnetic waves to wireless communication modules of other LORA terminal equipment; or the radio frequency antenna (3) receives electromagnetic waves sent by other LORA communication modules, the SX1278 chip (2) and the radio frequency circuit thereof process and convert the electromagnetic waves received by the radio frequency antenna (3) into digital signals, and the microcontroller MCU module (1) sends the digital signals to the LORA terminal equipment in a serial port mode.

2. The LORA communication module of claim 1, wherein the SX1278 chip (2) is electrically connected to an RF switch chip PE4259, and the RF circuit converts data processing to be transmitted into electromagnetic waves through an internal circuit of the SX1278 chip (2) and an internal circuit of the RF switch chip PE4259, or the RF circuit converts electromagnetic wave processing received by the RF antenna (3) into digital signals through an internal circuit of the SX1278 chip (2) and an internal circuit of the RF switch chip PE 4259.