import time
import math
from machine import ADC, Pin, I2C, PWM
from lcd_api import LcdApi
from pico_i2c_lcd import I2cLcd
import network
from BlinkLib import Blynk

# Define ADC pin for the microphone
mic_pin = ADC(Pin(34))

# Initialize I2C
i2c = I2C(0, sda=Pin(21), scl=Pin(22), freq=400000)

I2C_ADDR = 39
I2C_ROWS = 4
I2C_COLS = 20
lcd = I2cLcd(i2c, I2C_ADDR, I2C_ROWS, I2C_COLS)

# Define the noise threshold in dB
noise_threshold = 60  # Adjusted to 60 dB

# Microphone sensitivity (in dB per Volt) - replace with your microphone's sensitivity
MIC_SENSITIVITY = 3.0

# Define your Wi-Fi credentials
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASS = ""

# Create a Blynk instance with your Blynk authentication token
blynk = Blynk("UeDZ-EmFytNWjjr8Mc3hgZXCDNo7rWfu")

# Initialize Wi-Fi
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(WIFI_SSID, WIFI_PASS)

# Wait until Wi-Fi connection is established
while not wifi.isconnected():
    pass

# Function to calculate sound pressure level (SPL)
def calculate_noise_level(adc_value, reference_voltage, sensitivity):
    # Calculate noise level in decibels (dB) based on sensitivity and voltage
    noise_db = 20 * math.log10(adc_value / (reference_voltage * sensitivity))
    return noise_db

# Function to update noise level
def update_noise_level():
    global noise_level

    # Read ADC values from the microphone
    mic_value = mic_pin.read()

    # Set a constant reference voltage based on your system's maximum voltage
    reference_voltage = 5.0  # Assuming 5V maximum reference voltage

    # Calculate noise level
    noise_level = calculate_noise_level(mic_value, reference_voltage, MIC_SENSITIVITY)  # Update noise_level directly

    # Display the value on the LCD
    lcd.clear()
    lcd.move_to(0, 0)
    lcd.putstr("Noise Level: {:.2f} dB".format(noise_level))

    # Display the value on the Wokwi simulator screen
    print("Noise Level: {:.2f} dB".format(noise_level))

# Main loop with continuous data transmission
while True:
    # Update noise level
    update_noise_level()

    # Send the noise level to Blynk's Gauge widget (V0)
    blynk.virtual_write("V0", noise_level)

    # Delay for 2 seconds
    time.sleep(2)