import machine
import dht
import time

# Define Pins
DHTPIN = 15
ECG_PIN = 34
SPO2_PIN = 35

# Initialize DHT22 sensor
dht_sensor = dht.DHT22(machine.Pin(DHTPIN))

# Initialize ADC for ECG and SPO2
ecg = machine.ADC(machine.Pin(ECG_PIN))
spo2 = machine.ADC(machine.Pin(SPO2_PIN))

# Set attenuation for full 0-3.3V range
ecg.atten(machine.ADC.ATTN_11DB)
spo2.atten(machine.ADC.ATTN_11DB)

while True:
    try:
        dht_sensor.measure()
        temperature = dht_sensor.temperature()
        humidity = dht_sensor.humidity()
    except OSError:
        temperature = None
        humidity = None
        print("Failed to read from DHT sensor")

    ecg_signal = ecg.read()
    spo2_signal = spo2.read()

    # Simulated BPM and SpO2 calculations
    bpm = int((spo2_signal - 0) * (100 - 60) / (4095 - 0) + 60)
    spo2_percent = int((spo2_signal - 0) * (100 - 90) / (4095 - 0) + 90)

    # Output
    if temperature is not None and humidity is not None:
        print(f"Temp: {temperature:.2f} C, Humidity: {humidity:.2f} %, ", end='')
    print(f"ECG: {ecg_signal}, BPM: {bpm}, SpO2: {spo2_percent}")

    time.sleep(3)