Five-layer architecture of IoT, futuristic, modern, complex system, multiple devices interconnected, sensors, actuators, microcontrollers, gateways, cloud infrastructure, fog computing, edge computing, real-time data processing, wireless communication protocols, Wi-Fi, Bluetooth, Zigbee, 5G, industrial automation, smart home, wearable devices, embedded systems, Linux operating system, Python programming language, RESTful APIs, JSON data format, MQTT messaging protocol, device management, security, scalability, reliability, low latency, high availability, cloud-based services, Amazon Web Services, Microsoft Azure, Google Cloud Platform, urban cityscape, skyscrapers, neon lights, digital signage.