from machine import Pin, Timer
from dht import DHT22

# Initialize Timer
tim = Timer(0)

# Initialize GPIO pins for the 10-LED bar graph
led_pins = [Pin(i, Pin.OUT) for i in range(10)]

# Initialize DHT sensor
sensor = DHT22(Pin(21))

# Function to update the LED bar graph based on temperature
def update_led_bar(temp):
    # Determine the number of LEDs to light up based on temperature
    num_leds = 0
    if temp >= 8: num_leds = 1
    if temp >= 16: num_leds = 2
    if temp >= 24: num_leds = 3
    if temp >= 32: num_leds = 4
    if temp >= 40: num_leds = 5
    if temp >= 48: num_leds = 6
    if temp >= 56: num_leds = 7
    if temp >= 64: num_leds = 8
    if temp >= 72: num_leds = 9
    if temp >= 80: num_leds = 10
    
    # Update the LED bar graph
    for i in range(10):
        if i < num_leds:
            led_pins[i].value(1)  # Turn LED on
        else:
            led_pins[i].value(0)  # Turn LED off

# Define a callback function
def mycallback(t):
    sensor.measure()
    temp = sensor.temperature()
    hum = sensor.humidity()
    print("temp: {}, hum: {}".format(temp, hum))
    update_led_bar(temp)

# Set timer to call the callback function periodically (2000ms period)
tim.init(period=2000, callback=mycallback)