SmartLogis Cold Chain IoT Architecture integrates edge devices (ESP32-LoRa, ESP32-H2 Thread, Raspberry Pi) across warehouse floors, loading docks, and mobile assets, converging sensor data through a Mosquitto MQTT broker secured with TLS. A Node-RED dashboard and Python Flask REST API on OCI VMs orchestrate real-time monitoring, RFID/NFC access control, and environmental telemetry across 35 European client warehouses. This multi-tier design—from field hardware through warehouse management to enterprise cloud—demonstrates industrial IoT best practices for cold chain compliance, asset tracking, and distributed alert management. Fork and customize this architecture on Diagrams.so to adapt sensor types, add additional cloud APIs, or modify the mesh networking topology for your logistics operations. The integration of Thread mesh networking for warehouse aisles and LoRaWan for mobile assets showcases hybrid connectivity patterns suited to large-scale, geographically distributed cold storage environments.