from machine import Pin
import time
import network
from umqtt.simple import MQTTClient


# Cấu hình nút nhấn thay cho PIR
pir = Pin(14, Pin.IN, Pin.PULL_DOWN)

# Thông tin WiFi và MQTT
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASS = ""
MQTT_SERVER = "broker.hivemq.com"  # MQTT broker miễn phí
MQTT_TOPIC = b"wokwi/pir"

# Kết nối WiFi
def connect_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print("Đang kết nối WiFi...")
        wlan.connect(WIFI_SSID, WIFI_PASS)
        while not wlan.isconnected():
            time.sleep(0.5)
    print("WiFi đã kết nối:", wlan.ifconfig())

# Kết nối MQTT
def connect_mqtt():
    client = MQTTClient("esp32-pir", MQTT_SERVER)
    client.connect()
    print("Đã kết nối MQTT")
    return client

# Chương trình chính
connect_wifi()
client = connect_mqtt()

last_state = 0

while True:
    current_state = pir.value()
    if current_state != last_state:
        msg = b"Motion" if current_state else b"NoMotion"
        print("Gửi:", msg)
        client.publish(MQTT_TOPIC, msg)
        last_state = current_state
    time.sleep(0.2)