import network
import socket
import time

from machine import ADC, Pin
from web import WEBSITE_TEMPLATE

LM35_PIN = 33
adc = ADC(Pin(LM35_PIN))

# INIT PIN FUNCTION

# Set the attenuation. Adjust as needed based on your voltage range.
# For typical LM35 output (0-1V), ADC.ATTN_11DB is suitable.
adc.atten(ADC.ATTN_11DB)

# Optionally, set the width (resolution) of the ADC reading.
# ADC.WIDTH_12BIT gives values from 0 to 4095.
adc.width(ADC.WIDTH_12BIT)

def get_temperature():
    """Reads the analog value from the LM35 and converts it to Celsius."""
    try:
        # Read the analog value (0 - 4095 for 12-bit resolution)
        adc_value = adc.read()

        # Convert the ADC value to voltage.
        # The ESP32 ADC has a voltage range of 0V to 3.3V (when ATTN_11DB is used).
        # The formula is: voltage = (adc_value / 4095) * 3.3
        voltage = (adc_value / 4095) * 3.3

        # The LM35 has a linear output of 10mV per degree Celsius.
        # So, temperature (in Celsius) = voltage (in mV) / 10
        temperature_celsius = (voltage * 1000) / 10

        return temperature_celsius
    except Exception as e:
        print(f"Error reading temperature: {e}")
        return None

# INIT WEBSITE CONNECTION
SSID = '-'    
PASSWORD = '-'

station = network.WLAN(network.STA_IF)    # WiFi station

station.active(True)
station.connect(SSID, PASSWORD)     # connect out esp board to our router

while station.isconnected() == False:
  pass
print("WIFI Connected")
print(station.ifconfig())

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 80))
s.listen(5)



if __name__ == "__main__":
    while True:
        temperature = get_temperature()
        if temperature is not None:
            print(f"Temperature: {temperature:.2f} °C")

        conn, addr = s.accept()
        print('Got a connection from %s' % str(addr))
        request = conn.recv(1024)
        request = str(request)

        response = WEBSITE_TEMPLATE % (temperature)
        conn.send('HTTP/1.1 200 OK\n')
        conn.send('Content-Type: text/html\n')
        conn.send('Connection: close\n\n')
        conn.sendall(response)
        conn.close()

        print('Content = %s' % request)


        time.sleep(1) # Read temperature every 1 second