Worked on the Zephyr4Microchip/zephyr repository to enhance the reliability of LoRaWAN multicast services by addressing a critical timing issue in uplink response handling. Focused on C programming within embedded systems and network protocols, the work involved correcting unit discrepancies between seconds and milliseconds in multicast and fragmented data transport paths. This adjustment ensured compliance with the LoRa Alliance Fragmented Data Block Transport specification and prevented potential uplink collisions when multiple devices responded simultaneously. The approach emphasized code clarity by explicitly naming units, adding explanatory comments, and maintaining consistency across related modules, resulting in more maintainable and protocol-compliant network programming.