Which type of memory is suitable for saving sensor data in a CPS node?

Flash memory is particularly suitable for saving sensor data in a CPS (Cyber-Physical Systems) node due to several key characteristics. It is non-volatile, meaning that it retains data even when power is removed, which is crucial for applications where sensor data needs to be stored persistently after interruptions in power supply. This ability allows for reliable long-term storage of data collected from sensors, ensuring that important information is not lost.

Additionally, flash memory typically provides a good balance between storage capacity, reading/writing speed, and endurance—capabilities that are essential in CPS environments where sensor data can be generated at high rates and needs to be accessed quickly for processing or analysis. Flash memory can also support a significant number of write cycles, making it suitable for repeated data logging without wear-related failure.

In contrast to other memory types, such as RAM, which is volatile and loses stored data when power is lost, or EEPROM, which, while also non-volatile, often has more limited write cycles and slower write speeds, flash memory emerges as a more versatile and reliable choice for sensor data in a CPS node. Intermediate storage generally refers to temporary or transient data handling, which is not ideal for long-term storage needs. Thus, the characteristics of flash memory align