A Scalable IoMT Platform for Unified Medical Device Monitoring in Resource-Constrained Environments

Smart healthcare systems in low-resource areas typically do not have a unified system, rather they have separate IoT dashboards. This makes it difficult for caregivers to see the full picture of the patient's condition as they rely on paper based static reports. To solve this problem, This paper presents an integrated Internet of Medical Things (IoMT) platform that integrates two neonatal devices, a Vital Sign Monitor (VSM) and a Phototherapy Light (PTL). The proposed system uses Node-RED for edge data ingestion, an MQTT based communication layer, and a hybrid database backend (MongoDB for time-series sensor data and MySQL for structured information). It includes a web dashboard for real-time monitoring of neonates, and WhatsApp based alerts for critical events. We outline important design patterns (flow based Node-RED routing, lightweight on edge rule evaluation) that allow for rapid development and flexibility. In our tests, the system achieved an end-to-end delay of under 100 ms and showed zero data loss at regular workloads. In a mock deployment, clinicians responded faster to emergencies after receiving WhatsApp alerts. This denotes, this method is practical and more adaptable for hospitals in low- and middle-income countries.