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Add the FreeRTOS/coreSNTP library as a submodule (along with manifest.yaml file update) and add a demo project to showcase use of the coreSNTP library for having a SNTP client daemon in the system for periodically synchronizing system time with the internet to maintain Coordinated Univeral Time (UTC) in a device. This demo maintains UTC time of system in RAM, thereby, representing systems without a Real-Time Clock (RTC) module in the device. Note: This demo shows use of coreSNTP library for SNTP communication with NTP/SNTP time servers in non-authenticated mode (i.e. without any security mechanism payload beyond the standard 48 bytes of NTP packet exchange between client-server).
The 'core' branded application protocols are 'standalone' in that they do not have any dependencies outside of the C library. They use a simple transport interface definition to ensure they are not dependent on the underlying TCP/IP stack. This directory collects together the application protocols that all use the same transport interface definition. Directories: + coreMQTT contains the implementation of the coreMQTT library. See: https://www.freertos.org/mqtt + coreMQTT-Agent contains the implementation of the coreMQTT Agent library. See: https://www.freertos.org/mqtt/mqtt-agent-demo + network_transport contains the transport interface definition. See the comment above and https://www.freertos.org/network-interface.html + coreHTTP contains the implementation of the coreHTTP library. See: https://www.freertos.org/http