Micropython - WIFI and ADC sensor not working together

Im using esp32 and I have an ADC sensor called "Water Sensor" which detects the water level. Basically, I want to connect to a WIFI and then upload the readings to a MQTT Broker. But I found out, that if I connect to a WIFI, the read function doesnt work. Here is the code

from machine import ADC, Pin
import network
import time

adc_pin = 4 
adc = ADC(Pin(adc_pin))

Wi-Fi credentials
WIFI_SSID = "XXXXX"
WIFI_PASSWORD = "XXXXX"

def read_water_sensor(): #Reading the values
value = adc.read()  #Here is the error
return value 

def connect_wifi(): #Connecting def
sta_if = network.WLAN(network.STA_IF) 
if not sta_if.isconnected():
print("Connecting to Wi-Fi...")
sta_if.active(True)
sta_if.connect(WIFI_SSID, WIFI_PASSWORD)
while not sta_if.isconnected():
pass
print("Connected to Wi-Fi")

connect_wifi() #connect to the internet
while True:
water_value = read_water_sensor()
print("Water sensor value:", water_value)
time.sleep(0.1)

This is the error in Thonny micropython:

Traceback (most recent call last):
  File "<stdin>", line 29, in <module>
  File "<stdin>", line 14, in read_water_sensor
OSError: [Errno 116] ETIMEDOUT: ESP_ERR_TIMEOUT

Is there another way to read the values ? Or anything else I could try to do ?

I've been trying to use time.sleep between connecting to the internet and printing out the values. I also tried to connect to internet, then disconnect and try to get a value but still nothing