Issues with Ultrasonic Sensor

107

Hi there,

I'm trying to access the ultrasonic sensor, but with no luck. I'm just using the code in servers/ultra.py, but the GPIO.input(Ec) lines always returns 0. I've tried a different HC-SR04 from another kit and I'm having the same issue.

Can you give me some troubleshooting tips? Not sure how to proceed.

- Dave

3uiot6wchz

you need to set the Tr as HIGH again, or the Ec will continue to read the data from Tr.
------------
you can simply use the code below to get the distance information.

import ultra
distance = ultra.cheeckdist()
------------
if you don't want to keep read 0 from Ec, you can edit the ultra.py by adding 'GPIO.output(Tr, GPIO.HIGH)' after line 27 t2 = time.time()

like this:
def checkdist():       #Reading distance
    GPIO.setwarnings(False)
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(Tr, GPIO.OUT,initial=GPIO.LOW)
    GPIO.setup(Ec, GPIO.IN)
    GPIO.output(Tr, GPIO.HIGH)
    time.sleep(0.000015)
    GPIO.output(Tr, GPIO.LOW)
    while not GPIO.input(Ec):
        pass
    t1 = time.time()
    while GPIO.input(Ec):
        pass
    t2 = time.time()
    GPIO.output(Tr, GPIO.HIGH)     ###<<<add it here
    return (t2-t1)*340/2

107

Thank you for the reply.

I'm still having trouble. Here's my code for checkdist():

def checkdist():       #Reading distance
    GPIO.setwarnings(False)
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(Tr, GPIO.OUT,initial=GPIO.LOW)
    GPIO.setup(Ec, GPIO.IN)
    GPIO.output(Tr, GPIO.HIGH)
    time.sleep(0.000015)
    GPIO.output(Tr, GPIO.LOW)
    print(1)
    while not GPIO.input(Ec):
        pass
    print(2)
    t1 = time.time()
    while GPIO.input(Ec):
        pass
    print(3)

    t2 = time.time()
    GPIO.output(Tr, GPIO.HIGH)     
    return (t2-t1)*340/2

And I invoke it like this:

import ultra
print(ultra.checkdist())  

which returns "0" and then hangs.

Any ideas?

107

Is anyone from Adeept monitoring this forum? It would be good to get some ideas on how to proceed with this.

Adeept

107 replied at 2019-4-26 09:39 AM
Is anyone from Adeept monitoring this forum? It would be good to get some ideas on how to proceed wi ...

Hello,

Maybe the ultrasonic module is damaged, please contact our customer service team and provide your order number, we will send you a new sensor for free.

email: service@adeept.com

THX!

1501915115

107 replied at 2019-4-22 01:14 PM
Thank you for the reply.

I'm still having trouble. Here's my code for checkdist():

You can check if the wire connecting the ultrasonic module is loose, it is likely that the wire is loose, resulting in data reception error.

107

1501915115 replied at 2019-4-26 06:02 PM
You can check if the wire connecting the ultrasonic module is loose, it is likely that the wire is ...

I've definitely checked all the wiring, it's not the problem.

1623888739

I thought I am the only one who is having some issues on running the Ultrasonic Sensor, replacing the HC-SR04 from another kit also doesn't work for me. Is there anyone out there who have experience this thing and fix it? We badly needed some help because this is my first time on using this kit. download here for free and start slashing your opponents using your sword, there are different skills of your characters that you can use to clear the wave of monsters!

emulatorpc.com/8-ball-pool/