python code for obstacle detection

1. PYTHON CODE FOR SMART OBSTACLE DETECTION
USING RASBERRYPI
CODE TO CALCULATE THE DISTANCE FROM THE OBSTACLE USING ULTRASONIC
SENSOR
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)
# Define GPIO pins for the ultrasonic sensor
TRIG = 11
ECHO = 13
GPIO.setup(TRIG, GPIO.OUT)
GPIO.setup(ECHO, GPIO.IN)
# Distance measurement function
def distance():
GPIO.output(TRIG, True)
time.sleep(0.00001)
GPIO.output(TRIG, False)
pulse_start = time.time()
while GPIO.input(ECHO) == 0:
pulse_start = time.time()
pulse_end = time.time()
while GPIO.input(ECHO) == 1:
pulse_end = time.time()

2. pulse_duration = pulse_end - pulse_start
# Speed of sound is 343m/s
distance = pulse_duration * 17150
distance = round(distance, 2)
return distance
try:
while True:
dist = distance()
print("Distance: ", dist, "cm")
if dist < 30:
print("Obstacle detected!")
time.sleep(0.5)
except KeyboardInterrupt:
GPIO.cleanup()
This code sets up the GPIO pins for the ultrasonic sensor, defines a function
to measure the distance, and then enters an infinite loop that continually
measures the distance and prints it to the console. If the distance is less than
30cm, the code prints "Obstacle detected!". The code also includes a try-
except block to handle keyboard interrupts and cleanup the GPIO pins when
the code is stopped.

3. CODE TO CALCULATE THE PITHOLE FROM THE OBSTACLE USING ULTRASONIC
SENSOR
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)
# Define GPIO pins for the ultrasonic sensor
TRIG = 11
ECHO = 13
GPIO.setup(TRIG, GPIO.OUT)
GPIO.setup(ECHO, GPIO.IN)
# Distance measurement function
def distance():
GPIO.output(TRIG, True)
time.sleep(0.00001)
GPIO.output(TRIG, False)
pulse_start = time.time()
while GPIO.input(ECHO) == 0:
pulse_start = time.time()
pulse_end = time.time()
while GPIO.input(ECHO) == 1:
pulse_end = time.time()
pulse_duration = pulse_end - pulse_start
# Speed of sound is 343m/s
distance = pulse_duration * 17150

4. distance = round(distance, 2)
return distance
try:
while True:
dist = distance()
print("Distance: ", dist, "cm")
if dist > 100:
print("Pit-hole detected!")
time.sleep(0.5)
except KeyboardInterrupt:
GPIO.cleanup()
This code sets up the GPIO pins for the ultrasonic sensor, defines a function
to measure the distance, and then enters an infinite loop that continually
measures the distance and prints it to the console. If the distance is greater
than 100cm, the code prints "Pit-hole detected!". The code also includes a
try-except block to handle keyboard interrupts and cleanup the GPIO pins
when the code is stopped.

5. CODE TO CALCULATE THE PITHOLE FROM THE OBSTACLE USING ULTRASONIC
SENSOR
mport os
import glob
import time
os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')
# Define the location of the sensor
temp_sensor = '/sys/bus/w1/devices/28-0311970c3eff/w1_slave'
# Temperature measurement function
def read_temp_raw():
f = open(temp_sensor, 'r')
lines = f.readlines()
f.close()
return lines
def read_temp():
lines = read_temp_raw()
while lines[0].strip()[-3:] != 'YES':
time.sleep(0.2)
lines = read_temp_raw()
equals_pos = lines[1].find('t=')
if equals_pos != -1:
temp_string = lines[1][equals_pos+2:]
temp_c = float(temp_string) / 1000.0
temp_f = temp_c * 9.0 / 5.0 + 32.0
return temp_c, temp_f

6. try:
while True:
temp_c, temp_f = read_temp()
print("Temperature: ", temp_c, "C /", temp_f, "F")
time.sleep(1)
except KeyboardInterrupt:
print("Stopped by user")
This code sets up the Raspberry Pi to read from the DS18B20 temperature
sensor, defines a function to read the temperature, and then enters an infinite
loop that continually reads the temperature and prints it to the console. The
temperature is commanded through voice assistant to the user. The code also
includes a try-except block to handle keyboard interrupts and print a
message when the code is stopped.