MONDAY: A Unified Semantic Communication Profile with Dynamic Role Integration in Pub/Sub Systems

We present MONDAY, a BLE overlay that bundles all three roles in firmware; the current prototype still runs one fixed role per node. A three-node prototype on XIAO ESP32-C6 achieved 99.1 % delivery with 40 ms apparent RTT through a write-notify relay and lightweight RTOS queue. We outline designs for topic-hash routing, dynamic role migration, and Wi-Fi/TCP ports as future work.