Implementing BACnet protocol in an embedded microcontroller platform.

We want to implement BACnet IP Server and need to support DS-RP-B, DS-RPM-B, DS-WP-B, DS-WPM-B, DS-COV-B, DM-TS-B, DM-DDB-B. Product is for energy metering application so supported parameter will be of Analog Input Type. No. of parameter will be depends on available free memory. Existing application code (metering + tcp/ip stack + webserver) is based on NUC442VI8AE (Flash : 512 KB, RAM : 64 KB) where actual application takes Flash : 460KB and RAM : 50KB. We will port existing application code on below platform and additionally need to have BACnet IP server. We can choose any one of below 2 platform to speed up the project. Platform 1 : CPU : STM32H747IG (from ST Dual Core) with external PHY : LAN8742A-CZ-TR Tool/Compiler : STM32CubeIDE with GCC Platform 2 : CPU : R7FA6M2AF3CFP (from Renesas) with external PHY : IP101GR Tool/Compiler : E2Studio with GCC TCP/IP stack will be as per platform selection.