import machine
import dht
import time
import os

# DHT22 sensor setup
sensor_dht22 = dht.DHT22(machine.Pin(28))

# microSD card setup
spi = machine.SPI(0, sck=machine.Pin(18), mosi=machine.Pin(19), miso=machine.Pin(16))
cs = machine.Pin(17, machine.Pin.OUT)
vfs = os.VfsFat(machine.SDCard(spi, cs))
os.mount(vfs, '/sd')

# Heart rate sensor setup (example for MAX30100/MAX30102)
# Replace '21' and '22' with the correct SCL and SDA pin numbers for your setup
i2c = machine.I2C(1, scl=machine.Pin(21), sda=machine.Pin(22))
# Initialize the heart rate sensor here (library-specific initialization)

while True:
    try:
        # Read from DHT22
        sensor_dht22.measure()
        temp = sensor_dht22.temperature()
        hum = sensor_dht22.humidity()

        # Read from heart rate sensor (specific code depends on the sensor and library)
        heart_rate = 0  # Replace this with actual heart rate reading code

        # Prepare data string
        data = "Temperature: {:.2f} C, Humidity: {:.2f} %, Heart Rate: {} bpm\n".format(temp, hum, heart_rate)
        print(data)

        # Write data to microSD card
        with open('/sd/data.txt', 'a') as f:
            f.write(data)

    except Exception as e:
        print("Error:", e)

    time.sleep(2)