import dht
import machine
import time
import network
import socket
import ujson

# Khởi tạo cảm biến DHT22 (GPIO 15)
sensor = dht.DHT22(machine.Pin(15))

print("Connecting to WiFi", end="")
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect("Wokwi-GUEST", "")
while not wlan.isconnected():
  print(".", end="")
  time.sleep(0.1)
print(" Connected!")
print(wlan.ifconfig())

# Hàm lấy dữ liệu từ cảm biến DHT22
def get_dht22_data():
    try:
        sensor.measure()
        temp = sensor.temperature()  # Đọc nhiệt độ
        hum = sensor.humidity()      # Đọc độ ẩm
        return temp, hum
    except Exception as e:
        print('Error reading sensor:', e)
        return None, None

# Tạo server HTTP đơn giản
def serve():
    addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
    s = socket.socket()
    s.bind(addr)
    s.listen(1)

    print('Listening on', addr)

    while True:
        cl, addr = s.accept()
        print('Client connected from', addr)
        request = cl.recv(1024)
        print('Request:', request)

        # Lấy dữ liệu từ DHT22
        temp, hum = get_dht22_data()
        
        # Tạo JSON response
        response_data = {
            'temperature': temp,
            'humidity': hum
        }

        # Gửi response JSON
        response = ujson.dumps(response_data)

        cl.send('HTTP/1.1 200 OK\r\n')
        cl.send('Content-Type: application/json\r\n')
        cl.send('Connection: close\r\n\r\n')
        cl.send(response)
        cl.close()

# Khởi động server
serve()