HC-SR04不工作RPi2與python

Question

我想在我的RPi 2模型B上用python運行HC-SR04模塊，雖然我沒有成功。佈線看起來很好，編碼也是如此，但是脈衝不會被髮出或接收，任何人都可以幫忙嗎？

import RPi.GPIO as GPIO 
import time 

#GPIO Operandi (BOARD/BCM) 
GPIO.setmode(GPIO.BCM) 

# Set the GPIO pins 
TRIG = 35 
ECHO = 37 
# Define the direction in which the pins are working 
# If they send a signal OUT or recieve a signal IN 
# ultrasonic sensor pins for TRIG and ECHO 
GPIO.setup(TRIG, GPIO.OUT) 
GPIO.setup(ECHO, GPIO.IN) 
#Allowing sensor to settle 
GPIO.output(TRIG, False) 
time.sleep(2) 
# TRIG HIGH 
GPIO.output(TRIG, True) 
# TRIG LOW after 0.01ms 
time.sleep(0.00001) 
GPIO.output(TRIG, False) 
# Define start time 
while GPIO.input(ECHO) == 0: 
     StartTime = time.time() 
# Define end time 
while GPIO.input(ECHO) == 1: 
     StopTime = time.time() 
# Calculate the difference between the StartTime and the StopTime 
TimeElapsed = StopTime - StartTime 
# Multiply by speed of sound 
# Divide by 2 for one direction 
distance = (TimeElapsed * 34300)/2 
print(distance)` 

Answer 1

首先的手法需要是BOARD和其次的ECHO需要被連接到GND