import machine  
import utime  
from machine import Pin, PWM, ADC # Fixed: Added ADC and removed trailing comma 

### \==========================================

### 1\. HARDWARE SETTINGS

### \==========================================

PAIN\_THRESHOLD = 65000 

### \==========================================

### 2\. HARDWARE CONFIGURATION & INITIALIZATION

### \==========================================

### Servo Gate (PWM)

servo = PWM(Pin(9))  
servo.freq(50) 

### Ultrasonic Sensor

trig = Pin(5, Pin.OUT)  
echo = Pin(6, Pin.IN) 

### Sound Sensor (Analog)

sound\_sensor = ADC(Pin(26)) 

### Playtime Switch

time\_switch = Pin(7, Pin.IN, Pin.PULL\_UP) 

### \==========================================

### 3\. HELPER DRIVER FUNCTIONS

### \==========================================

def set\_gate\_angle(angle):  
duty = int(1638 + (angle / 180) \* (8192 - 1638))  
servo.duty\_u16(duty) 

def get\_distance():  
trig.low()  
utime.sleep\_us(2)  
trig.high()  
utime.sleep\_us(10)  
trig.low() 

signaloff = utime.ticks\_us()  
signalon = utime.ticks\_us() 

timeout = utime.ticks\_us()  
while echo.value() == 0:  
signaloff = utime.ticks\_us()  
if utime.ticks\_diff(signaloff, timeout) > 30000:  
return -1 

timeout = utime.ticks\_us()  
while echo.value() == 1:  
signalon = utime.ticks\_us()  
if utime.ticks\_diff(signalon, timeout) > 30000:  
return -1 

return ((signalon - signaloff) \* 0.0343) / 2 

### \==========================================

### 4\. MAIN OPERATIONAL LOOP

### \==========================================

while True:  
sound\_level = sound\_sensor.read\_u16()  
is\_playtime = time\_switch.value() == 0  
distance = get\_distance() 

\# === EMERGENCY OVERRIDE: Pain Sound Triggers Whole Array ===  
if sound\_level > PAIN\_THRESHOLD:  
set\_gate\_angle(0) # Slam the gate shut  
print("!! ALARM !!") # Fixed: Fixed Python indentation  
print("Pain Sound Heard")  
print("Level: " + str(sound\_level)) 

else: # Fixed: Added missing 'else' to separate alarm from regular logic  
if is\_playtime:  
print("PLAYTIME!") # Fixed: Removed display coordinates from normal print statements 

if 0 < distance < 10:  
set\_gate\_angle(90)  
print("Hamster at door")  
print("Gate: OPEN")  
else:  
set\_gate\_angle(0)  
print("No hamster seen")  
print("Gate: CLOSED")  
else:  
set\_gate\_angle(0)  
print("BEDTIME")  
print("System: LOCKED")  
print("Gate: CLOSED") 

utime.sleep\_ms(200)