Q1. What could cause an IoT device to stop working?

• Answer: Loose wires, wrong pin in code, internet not connected, power failure, incorrect Wi-Fi settings.

Q2. Why is troubleshooting important?

• Answer: It helps engineers find and fix errors, making IoT systems reliable and safe to use.

Q3. If your IoT LED is not turning ON, what are 2 things you should check first?

Answer: (1) Power supply and wiring, (2) Correct pin number in the Arduino code.