Smart Barrier Gate: Our Latest ESP32 Demo Project

ESP32 & Hardware
At Pacific Custom Engineering, we’re passionate about turning accessible hardware into practical, real-world solutions.
Our latest demo showcases a compact automatic barrier gate system — perfect for educational prototypes — built entirely around the powerful ESP32 microcontroller.

Check out the quick demo in action:

In this short video, you’ll see the system detect an approaching object (simulating a vehicle) and automatically raise the barrier arm. Once the path is clear, the gate lowers again — smooth, reliable, and fully automated.

Key Components Powering the Demo

  • ESP32 Development Board — The brain of the operation, handling sensor readings, logic, and servo control with ease.
  • HC-SR04 Ultrasonic Sensor — Measures distance in real-time to detect when something comes close (triggering the “open” command).
  • Servo Motor (for the barrier arm) — Delivers precise, smooth rotation for the gate movement.
  • USB Charging Data Cable – 540° Rotation – 3.3ft Red with 3 Magnetic Tips — Makes prototyping a breeze with quick, secure, solder-free connections during testing and development.

This setup keeps things simple yet highly functional — ideal for makers, students, or anyone exploring IoT and automation.

The complete code is open-source and available on our GitHub repository https://github.com/PacificCustomEngineering/ESP32-BarrierGate.  Feel free to download, modify, and adapt it for your own projects!

Pin Layout

#define TRIG_PIN 5
#define ECHO_PIN 18
#define SERVO_PIN 19
#define BUZZER_PIN 27 // GPIO 27
Want to build your own or need custom variations? Drop us a message — we’re here to help with parts, code tweaks, or full custom engineering solutions.
Stay tuned for more demos and tutorials from Pacific Custom Engineering!
#ESP32 #Arduino #IoT #Automation #MakerProjects #PacificCustomEngineering
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