Environmental sensing, liquid measurement and analysis.

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Liquid Measurement | Automation System & Control | Industrial Equipment Supplier - Aecl

Based in Taiwan, Autotronic Enterprise Co., Ltd. is an industrial equipment supplier of automation system controllers and signal converters since 1976.

As an industrial equipment supplier of automation environmental sensing, liquid measurement and analysis, Aecl provides total automation system control solutions particularly for air quality and temperature & humidity automation control fields. Flow control devices such as paddlewheels, magnetic and turbines, environment measurement equipment such as temperature & humidity transmitters, heat (BTU) meters & calculators and ultrasonic flowmeters, and GF valves and GF signet as a distributor in Taiwan.

Aecl has been offering customers high-quality and reliable automation system controllers, signal converter manufacturing and control systems, analyzers and automation solutions with professionalism. Both with advanced technology and 40 years of experience, Aecl ensures each customer's demands are met.

Private LoRa Network-LoRa Modbus RTU connection

Private LoRa Network-LoRa Modbus RTU connection
Private LoRa Network-LoRa Modbus RTU connection

Aecl launched devices for LoRa Modbus RTU communication includes IAQ sensors, master gateway and RS485 to LoRa converter. In this article, you can find the working principle of how to use the private LoRa network for indoor air quality monitoring or integrating your existing devices into wireless network. Comparing to the wired connection, wireless connection is more flexible for the installation and also allows lower cost. The cost and effective LoRa network is ideal for smart logistics, food storage, building automation, smart agriculture and so on.

I. Preface
When it comes to the wireless integration of field devices, most system integrators will encounter the challenge of different protocols between facilities and systems. Besides, in the renovation case of the old building, the fixed distribution of pipes and cables makes the sensor deployment more complex and increases the installation cost as well. With regard to these difficulties, Aecl develops the devices with the LoRa Modbus RTU communication to provide an optimal wireless solution.
II. Introduction
The LoRa Modbus RTU communication is based on Semtech RF technology which features on long-range wireless modem and provides ultra-long range spread spectrum communication and high interference immunity. The data format is Modbus RTU protocol which is commonly used in the automation system and enables the users to easily integrate the existing Modbus RTU devices. The LoRa Modbus RTU communication is widely used in smart building, smart logistics and smart agriculture as a rather cost and effective solutions for the long range and low data transmission.
The main application of the LoRa network could be divided into three parts which are wireless air quality monitor, wireless device control and wireless integration of the existing facilities.
A. Wireless air quality monitoring
To deploy the private LoRa network in indoor air quality monitoring system, users will need Aecl LoRa sensor and the AUS-401 LoRa gateway. As shown in figure 1, the LoRa sensors could be easily paired up with the LoRa gateway. Users can interface the gateway with their back end system or PLC to access the real time air quality data in Modbus RTU data format.
Figure 1: Instructure of Private LoRa Network
AUS-401 Gateway
The AUS-401 master gateway is able to wirelessly collect the data from maximum 32 units of Aecl air quality transmitters and send the data via RS485 or RS232 interface to the system or PLC. The data format is in standard industrial protocol Modbus RTU.
LoRa Air quality transmitters
Aecl released a whole series of wireless IAQ sensor nodes including temperature, humidity, carbon monoxide, carbon dioxide, PM2.5, PM10, HCHO, TVOC, illuminance and oxygen measurement. With Semtech SX1272 RF chip embedded, the Aecl LoRa transmitter could automatically pair up with AUS-401 master gateway to transmit the measurement data. Besides, the interface could be changed by DIP switches from LoRa wireless interface to RS485 wired interface which provides higher flexibility of the installation.
B. Wireless device control
Aecl develops the smart plug and hope to provide users the solution of wireless automation control. The smart plug could be controlled wirelessly by the system via AUS-401 gateway. As indicated in figure 2, users can define the set point in their back end system and send the instruction to the AUS-401 master gateway. When the indoor air quality is over the defined point, the AUS-401 master gateway will send signal wirelessly to the smart plug to turn on or off the ventilation devices such as ventilation fan or alarm.
Figure 2: Instructure of LoRa control
C. Wireless integration of the existing facilities
To provide a more convenient way to integrate the existing devices to the IoT network, Aecl designs the AUS-405 RS485/ RS232 to LoRa converter as the media for integrating the existing devices such as flow meter, electric meter, water meter and etc. As shown in Fig. 3, the AUS-405 converter is able to collect the data from the existing facilities via RS485 or RS232 interface and send the data to the AUS-401 master gateway via wireless LoRa communication. Each AUS-405 could connect with 32 units of facilities. The AUS-405 converter allows the users to simplify the process of field devices integration and reduce the cost.
Figure 3: Instructure of field devices integration
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  • Tech-Aecl Private LoRa Network-LoRa Modbus RTU connection
    Tech-Aecl Private LoRa Network-LoRa Modbus RTU connection

    Aecl launched devices for LoRa Peer to peer communication includes IAQ sensors, master gateway and RS485 to LoRa converter. In this article, you can find the working principle of how to use the private LoRa network for indoor air quality monitoring or integrating your existing devices into wireless network. Comparing to the wired connection, wireless connection is more flexible for the installation and also allows lower cost. The cost and effective LoRa network is ideal for smart logistics, food storage, building automation, smart agriculture and so on.



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