DTU (Data-Transfer-Unit), means the data transmission unit, that is, the data transmitter, and 4G-DTU is the 4G version of the data transmitter. Ebyte has developed and sold the 4G version of the DTU for many years. And there are not only 4G version of DTU, but also Wi-Fi version, Ethernet version, and LoRa version. This article mainly introduces the use and significance of 4G version DTU.
First of all, we must understand what 4G-DTU can do and how many possibilities it can expand. First, 4G-DTU can be used as a pure tool communication middleware, which can directly help you realize the data transmission process. The server communicates with the device, then 4G-DTU can directly help you interact with the server, just configure the DTU, set the server address and port (if it is the MQTT protocol, configure the triplet parameters, etc., according to Different protocols and configurations are different), then DTU will automatically connect to the server, you can directly send messages to DTU through 485, and DTU will forward the information to the server. Similarly, the information sent by the server, DTU will also directly output through 485 come out. NB-IOT and 4G wireless
Secondly, the 4G-DTU can be plugged with ModBus devices and used as a communicator for ModBus devices. For example, after connecting the DTU configuration to your own server, the server can directly issue ModBus commands, and the DTU will directly transmit the commands through 485. The 485 of the DTU is directly connected to the lower-end ModBus slave device, and the ModBus-side device slave can respond to the ModBus command issued by the server or respond to the query command, and the reply command of the ModBus slave will also be returned to the server through 4G-DTU .
According to the above functions, Ebyte has also expanded its 4G-DTU and developed the E870 series of ModBus edge gateways. It is also a 4G-DTU, but it has DO/DI/AI acquisition and control functions. The command issued by the server can directly control the end device. At the same time, it has the same function as the ordinary 4G-DTU. As a ModBus edge gateway, it can manage ModBus edge devices in batches. For example, there are 4 devices A, B, C, and D. All are mounted on the E870. After the configuration is completed, the E870 will always collect the information of the edge device and save it internally. You can set the periodic reporting status or change the reporting status. NB-IoT DTU After the collected data changes, the information can be uploaded to the server through 4G, or the information can be reported to the server periodically. Not only that, the reported information is also sorted out. The data read out by the ModBus protocol is translated into json format and uploaded directly to the server, which saves the server from parsing the information and facilitates the user to monitor the device intuitively.