from machine import Pin, I2C, ADC

import time

import ssd1306

import dht

import ds1307

import nec 

from machine import Pin



# ------------------ 硬件初始化 ------------------

i2c = I2C(0, scl=Pin(22), sda=Pin(21))  # OLED + DS1307 共用I2C总线

oled = ssd1306.SSD1306_I2C(128, 64, i2c)

rtc = ds1307.DS1307(i2c)



# rtc.datetime((2025, 6, 3, 2, 15, 30, 0, 0))  # 初始化时间（只用一次）



dht_sensor = dht.DHT22(Pin(4))     # DHT22 温湿度

mq2 = ADC(Pin(36))                 # MQ2 气体传感器

mq2.atten(ADC.ATTN_11DB)           # 设置ADC范围为 0~3.6V

pir = Pin(14, Pin.IN)              # PIR 人体感应

relay = Pin(5, Pin.OUT)            # 继电器控制风扇



# ------------------ 红外遥控相关 ------------------

threshold = 2000                   # 初始阈值

ir_pin = Pin(13, Pin.IN)           # 红外接收器接在 GPIO13



def ir_callback(data, addr, ext):

    global threshold

    if data == 0x2A:               # 遥控器按键 "1"

        threshold += 100
        print("增加阈值, 当前值: ", threshold)
    
    elif data == 0xA8:             # 按键 "2"

        threshold -= 100
        print("降低阈值, 当前值: ", threshold)
    
    else:
        print("收到未知按键: ", hex(data))
    


ir = nec.IR_RX(ir_pin, ir_callback) 


# ------------------ 显示姓名、学号、时间 ------------------

def display_page_1():

    for _ in range(3):

        dt = rtc.datetime()

        time_str = "{:02d}:{:02d}:{:02d}".format(dt[4], dt[5], dt[6])

        oled.fill(0)

        oled.text("name: jjjrrr", 0, 0)

        oled.text("sno: 20251234", 0, 10)

        oled.text("time:", 0, 25)

        oled.text(time_str, 0, 40)

        oled.show()

        time.sleep(1)



# ------------------ 显示传感器信息 ------------------

def display_page_2(temp, hum, gas, motion, thr):

    oled.fill(0)

    oled.text("Temp: {:.1f}C".format(temp), 0, 0)

    oled.text("Humi: {:.1f}%".format(hum), 0, 10)

    oled.text("Gas: {}".format(gas), 0, 20)

    oled.text("Motion: {}".format("Yes" if motion else "No"), 0, 30)

    oled.text("Thr: {}".format(thr), 0, 50)

    oled.show()

    time.sleep(2)



# ------------------ 主程序循环 ------------------

def main():

    display_page_1()



    while True:
   

        try:

            dht_sensor.measure()

            temp = dht_sensor.temperature()

            hum = dht_sensor.humidity()

        except:

            temp = 0

            hum = 0



        gas_value = mq2.read()

        motion = pir.value()



        # 控制风扇

        if gas_value > threshold:

            relay.value(1)

        else:

            relay.value(0)



        display_page_2(temp, hum, gas_value, motion, threshold)
       


main()