Recently, my team is studying how to optimize the SMS function of the M2M module in the asset monitoring device. Sms function that is, the communication M2M module is used to achieve SMS editing, storage, sending, receiving, reading, deleting, and SMS notification reporting functions through AT commands.
Because M2M modules are widely used, they are often used in later development work. On this basis, the author has edited this into a complete document to help users who are also engaged in development work.
Introduction to asset monitoring equipment: The main function of asset monitoring equipment is to help users monitor goods in motion, including the real-time location of goods and the movement status of goods. Avoid abnormal situations in which goods are lost or damaged during transportation. AOVX asset monitoring equipment works by collecting location information and motion status through positioning technology and sensors, and then transmitting the information to the cloud background through communication modules and networks, and users only need to log in to the cloud background to understand the real-time situation of the goods at any time. For example, before transporting valuables, the user places the asset monitoring equipment in the goods, and when the goods are in transit, the user can log in to the cloud background to monitor the arrival time, real-time location and other information of the goods. When the goods are violently thrown or stolen during transportation, the system will automatically alarm the police to remind the user to confirm the true condition of the goods in time to avoid damage to the assets caused by the damage or loss of the goods.
For the information transmission of asset monitoring equipment, the SMS function of the M2M module has played an important role, according to the characteristics of the SMS application, there are PDU methods and text modes, PDU methods are generally suitable for some developers who have in-depth understanding of SMS, PDU information packets and unpacking are carried out by external MCUs, with strong versatility, generally speaking, different module manufacturers PDU way to send and receive SMS content is exactly the same, for customers to choose modules, modules have a strong interchangeability. The text method is a relatively simple way for customers to use, but the output results of the same SMS to text conversion may be inconsistent between different manufacturers.
Therefore, in the actual development work, it is also necessary to make decisions based on the actual situation.