"""
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Raspberry Pi Pico HC-SR04 Ultrasonic Sensor (MicroPython)┃
┃ ┃
┃ A program to measure distances using the HC-SR04 ┃
┃ ultrasonic sensor and display the values on an SSD1306 ┃
┃ OLED display or an I2C LCD display connected to a ┃
┃ Raspberry Pi Pico. ┃
┃ ┃
┃ Copyright (c) 2023 Anderson Costa ┃
┃ GitHub: github.com/arcostasi ┃
┃ License: MIT ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
"""
from machine import Pin, time_pulse_us
from time import sleep_us, sleep
# Define the GPIO pin numbers for the trigger and echo pins
ECHO_PIN = 26
TRIGGER_PIN = 27
# Initialize trigger and echo pins
trigger = Pin(TRIGGER_PIN, Pin.OUT)
echo = Pin(ECHO_PIN, Pin.IN)
def measure_distance():
# Ensure trigger is low initially
trigger.low()
sleep_us(2)
# Send a 10 microsecond pulse to the trigger pin
trigger.high()
sleep_us(10)
trigger.low()
# Measure the duration of the echo pulse (in microseconds)
pulse_duration = time_pulse_us(echo, Pin.high)
# Calculate the distance (in centimeters) using the speed of sound (343 m/s)
distance = pulse_duration * 0.0343 / 2
return distance
def main():
while True:
# Measure the distance and print the value in centimeters
distance = measure_distance()
print("Distance: {:.2f} cm".format(distance))
# Wait for 1 second before taking the next measurement
sleep(1)
if __name__ == "__main__":
main()
f