Automatic Car Barrier System Using ESP32 + Servo Motor + Ultrasonic Sensor In this project, we build an automatic car barrier gate that opens and closes by detecting a vehicle using an ultrasonic distance sensor and control it with an ESP32 microcontroller and a servo motor. 📌 In this video you’ll learn: ✔ How to connect the ESP32 with an HC‑SR04 ultrasonic sensor ✔ How to control a servo motor to lift and lower the barrier ✔ How the ultrasonic sensor detects vehicle presence ✔ Complete wiring, code walkthrough and testing ✔ Useful tips for real-world parking gate automation 📦 Components Used: • ESP32 Dev Board • Ultrasonic Sensor (HC‑SR04) • Servo Motor • Breadboard & Jumper Wires • Power Supply 🔧 Project Overview: The ultrasonic sensor continuously measures the distance. When a vehicle is detected within a set range, the ESP32 activates the servo motor to raise the barrier. Once the car moves away, the barrier closes automatically. YouTube +1 🧠 Code & Wiring: Download the full circuit diagram and Arduino IDE code in the comments. 🚀 Use Cases: • Smart parking system • Toll barrier automation • DIY home garage entry system 💬 Leave a comment if you want a step‑by‑step written tutorial or PCB layout! 📌 Don’t forget to LIKE 👍, SUBSCRIBE 🔔 and SHARE for more IoT & embedded projects!