Before the Open FOTA solution, the module only supported to upgrade the application APP of the module (FOTA), after using Open FOTA, the module can upgrade the application APP of the MCU (FOTA), which can be called Firmware Upgrade (FOTA) and Application Upgrade (SOTA) respectively from the perspective of the whole device terminal. Therefore, the Open FOTA solution is equivalent to empowering the FOTA upgrade capability and SOTA upgrade capability of IoT devices at the same time.