import machine
import time
import math

# Setup ADC for NTC Sensor on GPIO 34
adc = machine.ADC(machine.Pin(34))
adc.atten(machine.ADC.ATTN_11DB)  # 11dB attenuation (0-3.3V range)

# Thermistor Parameters (Adjust as needed)
R_NOMINAL = 10000  # 10kΩ thermistor
B_COEFFICIENT = 3950  # Beta value
SERIES_RESISTOR = 10000  # 10kΩ pull-up resistor
VCC = 3.3  # Supply voltage

# Simulate Wi-Fi Connection
wifi_info = ("192.168.4.1", "255.255.255.0", "192.168.4.1", "8.8.8.8")
print(f" Connected to Wi-Fi! {wifi_info}\n")

# Simulate Attacker Interception
print(" Attacker Intercepting on 192.168.4.1:8080...")
print(" Server Listening on 192.168.4.1:8081...\n")

def read_temperature():
    """Reads ADC value and converts it to temperature using thermistor formula."""
    raw_value = adc.read()  # Read ADC value (0-4095)
    voltage = raw_value * (VCC / 4095)  # Convert to voltage (0-3.3V)

    # Convert voltage to resistance
    resistance = SERIES_RESISTOR * (VCC / voltage - 1)

    # Apply the Steinhart-Hart equation
    temperature = 1 / (1 / (273.15 + 25) + (1 / B_COEFFICIENT) * math.log(resistance / R_NOMINAL))
    temperature -= 273.15  # Convert Kelvin to Celsius

    return temperature

while True:
    try:
        # Read temperature from NTC sensor
        temperature = read_temperature()
        print(f" Client Sending: Temperature={temperature:.2f}°C")
        time.sleep(1)

        # Simulate MITM Attack
        intercepted_temp = temperature
        print(f" Intercepted: Temperature={intercepted_temp:.2f}°C")

        # Modify the intercepted data
        modified_temp = temperature + 40  # Example: increasing temp by 40°C
        print(f" Modified Data: Temperature={modified_temp:.2f}°C")
        time.sleep(1)

        # Simulate Server Receiving Data
        print(f" Server Received: Temperature={modified_temp:.2f}°C")
        time.sleep(3)

    except Exception as e:
        print("Error reading temperature sensor:", e)
        time.sleep(2)