In the concept of the Internet of Things, the wireless communication module is the key link between the perception layer and the network layer of the Internet of Things. Among them, the role of the cellular communication module is to carry the data interaction from the end to the cloud platform through the wide area network, is the channel for user data transmission, and is one of the core components of the IoT terminal.
The data communication between the terminal and the platform is completed through the module. There are mainly two ways, AT command mode and data transparent transmission mode.
1.
AT command mode AT command mode is that the main controller sends AT commands to the module through the serial port, and sends the terminal data ("10") to the module, and then sends it to the platform through the module. There will be a response (SNED OK) if the AT command is sent successfully. After the transmission is completed, the module responds to the main controller through the serial port, and the transmission is completed; the platform sends data ("01") to the module, and the module sends the data to the main controller through the serial port to realize the operation of the opposite end. There will be a response if the AT command is sent successfully.
2. Data transparent transmission mode
means that the main controller sends data ("10") to the module through the serial port, and then sends it to the platform through the module. After sending, the platform sends the data to the module, and the module sends the data to the main controller through the serial port to realize the operation of the opposite end.
The data transmission process does not need to send a specific command. Of course, to enter the transparent transmission mode, you still need to configure the module through the main controller to send related AT commands, such as the platform address, turn on the transparent transmission mode, and so on. Note: In the transparent transmission mode, it is best to increase the data length, checksum and other information to prevent packet loss and other problems. If the device communicates abnormally, you need to exit the transparent transmission mode to troubleshoot the problem.
The transparent transmission module, as its name implies, is the transparent transmission module. Transparent transmission means that during the transmission process, regardless of the transmitted business, it is only responsible for transmitting the business that needs to be transmitted to the destination node, which is equivalent to a data line or serial line, and serial data through the module The TCP/IP protocol stack encapsulates the data, and then uploads the data to the cloud platform through the network without processing the transmitted business.
In the Internet of Things era where things are connected, if you want to realize the data transparent transmission of smart devices, you need to rely on the power of the wireless transparent transmission module, which can realize that the length and content of the sender and receiver data are exactly the same, without any data processing. It only requires transparent data transmission, and can be widely used in many industries such as energy and electricity, automatic meter reading, smart cities, industrial automation, on-board transportation, environmental monitoring, equipment monitoring, and modern agriculture.
In response to the growing demand for data transparent transmission, as an IoT communication development company, Miracle IoT has launched AP1000E, AP2000E, and AP4000E industrial-grade DTUs based on eSIM module technology, which are dedicated for unattended use.
Based on the eSIM solution, it is stable and reliable, and provides strong support for the communication network and wireless transmission of the project. Support RS232, RS485 and other interfaces, GPRS/NB/LTE network coverage, wide pressure, support network configuration;
In addition, Miracle IOT has also launched eSIM technology-based transparent transmission module AP1000MT, AP2000MT, which supports GPRS/NB/LTE network, AP4000MT.
Compared with the traditional DTU, similar to the 4G DTU application scenario, the simplified version of the DTU (without 232/485) is smaller in size, lower in cost, and higher in integration. It can be deployed on the control panel of the customer’s equipment for easy Replace, the application is more flexible.
Compared with modules, in terms of hardware, it reduces the workload of peripheral hardware circuit design and development, such as power supply, radio frequency, SIM interface circuit; only need to design related interface circuits according to product pin definitions to supply power to the device; in terms of hardware, no need to After the module is initialized, the basic parameters (baud rate, IP address, registration packet/heartbeat packet) are configured and enter the transparent transmission mode, the terminal can communicate with the cloud platform through the transparent transmission module.
