This course offers a hands-on introduction to data visualization for IoT systems using popular platforms like Power BI, Tableau, Grafana, and Kibana. Students will explore the process of interfacing sensors such as DHT11, MQ135, and LDR with the ESP32, and then send data to cloud platforms like ThingSpeak and InfluxDB. The course will guide learners through the creation of real-time weather data dashboards to analyze environmental factors such as temperature, humidity, light intensity, and CO₂ levels. With practical applications using Arduino IDE and real-time streaming, learners will gain insights into weather data analysis and learn how to build interactive dashboards for effective decision-making.