ELEGOO Mega R3 or Arduino Mega 2560 REV3 Passive Buzzer LCD1602 Module 4x4 Matrix Array Membrane Switch Keypad Ultra Sonic Sensor Female-to-Male Dupont Wires Breadboard Breadboard Jumper Wires USB ...

This uses Arduino MEGA connected to a Ultrasonic sensor and and I2C LCD screen to display distance from the sensor This code will check distance and indicate if an obstacle/person is away for 5 ...