Obstacle detection system with ESP32

Objective of this project:

In this project we will realize an obstacle detection system with Arduino. This system mainly uses an ultrasonic sensor, buzzer and LED.

When the ultrasonic sensor detects an obstacle at a distance <4cm, the ESP32 board gives the order for the buzzer to sound.

Necessary components

• ESP32
• HC-SR04 Ultrasonic sensor
• Buzzer
• SSD1306 display

• Connecting wires

• Test plate

Mounting:

To perform the assembly, you can connect

For buzzer:

• the terminals (+) to pin D4 of the ESP32 board

• the terminals (-) to the GND pin of the ESP32 board

For HC-SR04 sensor:

• the TRIG pin to pin D5 of the ESP32 board

• the Echo pin to pin D18 of the ESP32 board

• the VCC pin to the VCC pin of the ESP32 board

• the GND pin to the GND pin of the ESP32 board

For display:

• the SCL pin to pin D22 of the ESP32 board

• the VCC pin to the 3.3V pin of the ESP32 board

• the GND pin to the GND pin of the ESP32 board

• the SDA pin the D21 pin of the ESP32 card

Micropython program

Here is the program of the sound alarm system:

Note: you must import the following two libraries: hcsr04 and ssd1306