Raspberry pie 4B sound sensor do module

DOUT：Digital Out（ Digital output ）

AOUT：Analog Out（ Analog output ）

GND： Grounding

VCC： Positive pole

( Not used in this article AOUT connection )【 The cross knob on the top can be used to adjust the sound sensitivity 】

step ：

（1）VCC Connect to raspberry pie 3.3V perhaps 5V Pin

（2）GND Connect to raspberry pie GND Pin

（3）DOUT Connect to any GPIO Interface

  As shown in the figure

Red thread （VCC） Connect pin 1 （3V3 power）

Black line （GND） Connect pin 6 （Ground）

The yellow line （DOUT） Connect pin 3 GPIO 2（SDA）

matters needing attention : Not recommended GPIO-2 and GPIO-3, The following code uses GPIO-4

import time
import RPi.GPIO as GPIO

""" Specify the numbering sequence as BOARD"""
GPIO.setmode(GPIO.BOARD)

# Define the sensor connection GPIO Pin for 4
sound=4## Totally wrong 
#2 yes GPIO code , Use here BOARD Coding pin , Look-up table is GPIO 2  Corresponding BOARD In coding 7[ Same as physical code ]
sound=7# correct 


# Appoint 2 No. pin mode is output mode 
# By default, it is pulled high , Low level means OUT Mouth has output 
GPIO.setup(sound,GPIO.IN,pull_up_down=GPIO.PUD_UP)

try :
    while True:
        # Check whether the sound sensor module has output low level 
        print(GPIO.input(sound))
        if c==0:
            print(" Sound detected ")
        time.sleep(0.2)

except KeyboardInterrupt:
    print(" Stop testing ")
    
finally :
    GPIO.cleanup()