Raspberry PI Ultrasonic Control Code
Ultrasonic sensors measure distance with ultrasonic waves. It measures timeframe from emitting sound until receiving the rebounced soundwaves. By knowing the soundspeed (340.29m/s), the ultrasonic controller can calculate the distance in 0.01cm accuracy. You can always ask the current distance between any object and the sensor. This a perfect tool for building small robots.
Required hardware
- Raspberry PI
- Ultrasonic sensor(s)
- Logic Level Converter(s)
Source code to install on controller
import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) TRIG = 17 ECHO = 27 print("Distance Measurement In Progress") GPIO.setup(TRIG, GPIO.OUT) GPIO.setup(ECHO, GPIO.IN) try: while True: GPIO.output(TRIG, False) time.sleep(1) GPIO.output(TRIG, True) time.sleep(0.00001) GPIO.output(TRIG, False) while GPIO.input(ECHO) == 0: pulse_start = time.time() while GPIO.input(ECHO) == 1: pulse_end = time.time() pulse_duration = pulse_end - pulse_start distance = pulse_duration * 17150 distance = round(distance, 2) print "Distance: ", distance, "cm" except KeyboardInterrupt: GPIO.cleanup()
More information
- How to setup a ultrasonic sensor on arduino mega
- How to setup a ultrasonic sensor on arduino nano
- How to setup a ultrasonic sensor on arduino uno
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- How to setup a ultrasonic sensor on Raspberry Pi
- Ultrasonic sensor protocol for arduino
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