RS485 to 4G The Best Scheme of Temperature and Humidity Sensor Networking Based on Modbus Protocol

Abstract: This paper will discuss the best scheme to connect the temperature and humidity sensor based on Modbus protocol with RS485 interface to 4G network.We will analyze the sensor network architecture, data transmission protocol, data conversion and transparent transmission technology.And how to select the appropriate hardware devices to ensure real-time, accurate and efficient transmission of sensor data.

With the rapid development of industrial Internet of Things, temperature and humidity sensors are more and more widely used in intelligent environmental monitoring.These sensors usually communicate with Modbus protocol through RS485 interface to realize real-time monitoring of environmental parameters.However, for remote monitoring and data sharing, we need to connect these sensors to the 4G network.This article will elaborate on the best way to achieve this goal.

Sensor network architecture

First, we need to build a stable and reliable sensor network architecture.In this architecture, the temperature and humidity sensor is connected to the data acquisition equipment (such as DTU) through the RS485 interface.The data acquisition device sends the data to the remote server through the 4G network.This architecture enables remote transmission and centralized management of sensor data.

Data transmission protocol selection

Considering that the sensors use the Modbus protocol for communication, we need to select a data transmission scheme that supports the Modbus protocol.One common method is to use a Modbus protocol based on TCP/IP, such as Modbus TCP, for data transmission.Through Modbus TCP, we can encapsulate sensor data into TCP packets and transmit them over 4G networks.This scheme has the advantages of good compatibility and high transmission efficiency.

Data conversion and transparent transmission technology

In the process of RS485 to 4G, we need to use data conversion and transparent transmission technology.Specifically, the data acquisition device needs to be able to convert the Modbus data received by the RS485 interface into a format suitable for 4G network transmission.At the same time, the data acquisition equipment also needs to have the function of transparent transmission to ensure that the sensor data is not modified or processed in the transmission process.This can ensure the real-time and accuracy of the data.

Hardware device selection

In order to achieve the above program, we need to choose a suitable hardware device as a data acquisition device.The device should have the following features:

· Support RS485 interface and Modbus protocol;

· Support 4G network communication;

· Capable of data conversion and transparent transmission;

· Has stable and reliable performance;

· Support remote configuration and management.

Scheme implementation and optimization

During the implementation of the scheme, we need to configure and debug the sensor network to ensure the correct transmission of data.At the same time, we also need to monitor and optimize the data transmission process to improve the transmission efficiency and stability.For example, we can reduce the data transmission delay and error rate by adjusting the packet size and optimizing the transmission frequency.

The best way to connect the temperature and humidity sensors based on Modbus protocol with RS485 interface to the 4G network includes building a stable sensor network rack.Structure, selection of appropriate data transmission protocol, application of data conversion and transparent transmission technology, and selection of hardware equipment that meets the requirements.By implementing this scheme, we can achieve real-time, accurate and efficient transmission of sensor data.Provide strong support for intelligent environment monitoring.