Create a simple HAND-DRAWN university exam style diagram of “CoAP Communication in Same Constrained Network”. Style: - Black pen sketch - White notebook paper background - Handwritten engineering exam style - Simple boxes and arrows - Clean and neat - No colors - PNG format - High clarity - Easy to redraw in B.Tech exams Diagram Content: - Temperature Sensor - Smart Fan - Smart Light - CoAP Client - CoAP Server - UDP Layer - Constrained IoT Network cloud Connections: - Sensor sends CoAP GET Request - Smart Fan sends ACK Response - Smart Light receives control signal Labels: - GET Request - ACK - UDP Communication - Low Power Network Layout: Temperature Sensor → CoAP Request → Smart Fan / Smart Light → ACK Response The final output should look exactly like a handwritten IoT university exam notebook diagram drawn with black pen.