import machine  
import ujson  
import time  
from machine import Pin, Timer, ADC 
import network  
import urequests  
# 初始化DHT11传感器（假设连接到GPIO2
from lcd_api import LcdApi  
from i2c_lcd import I2cLcd   
class MyLcdApi(LcdApi):
    def hal_write_command(self, command):
        # 在这里编写将命令发送给LCD屏幕的代码
        # 例如，通过GPIO通信发送命令给LCD
        raise NotImplementedError("hal_write_command method not implemented in MyLcdApi")


# 初始化引脚  
motion_pin = Pin(35, Pin.IN)  
led_pin = Pin(2, Pin.OUT)  
  

# 初始化I2C总线  
i2c = machine.SoftI2C(scl=machine.Pin(5), sda=machine.Pin(4), freq=400000)  
# 初始化LCD（假设使用I2C接口）  
# 实例化I2cLcd类，这里假设LCD有4行20列  
i2c = I2cLcd(i2c, 0x27, 4, 20)  # 0x3F是常见的LCD I2C地址，但请根据你的实际硬件修改
lcd =  MyLcdApi(4,20)
# 实例化LcdApi类，将I2cLcd实例作为参数传入  
lcd.clear()  # 清除LCD显示   
  
# 设置LED初始状态为关闭  
led_pin.off()  
# 设置运动传感器为输入  
motionsensor = machine.Pin(motion_pin, machine.Pin.IN)  
# 设置读取温度数据的间隔  
read_interval = 0.5  
last_motion_time = time.time()  
readings = []  
adc = ADC(0)
def read_temperature():  
    global last_motion_time, readings  
    if time.time() - last_motion_time > 9:  
        # 如果超过9秒没有检测到运动，关闭LED并清除LCD  
        led_pin.off()  
        lcd.clear()  
        readings = []  
    else:  
        # 否则，读取温度并添加到列表中  
        temperature = adc.read()  
        if temperature is not None:  
            readings.append(temperature)  
        # 计算平均值并打印到LCD和串口  
        if len(readings) > 0:  
            avg_temp = sum(readings)/len(readings)
            lcd.hal_write_data("Avg Temp: {avg_temp:.2f} C")
            print(f"Avg Temp: {avg_temp:.2f} C")  
  
# 设置定时器以定期读取温度  
timer = Timer(1)  
timer.init(freq=1/read_interval, mode=Timer.PERIODIC, callback=read_temperature)  
  
try:  
    while True:  
        # 检查运动传感器状态  
        if motion_pin.value() == 1:  
            # 如果检测到运动，重置定时器（0.5秒间隔）  
            last_motion_time = time.time()  
            read_temperature() 
            timer.deinit()  
            timer.init(freq=1/(0.5), mode=Timer.PERIODIC, callback=read_temperature) 
            
        else:  
            # 如果没有检测到运动，设置3秒间隔  
            timer.deinit()  
            timer.init(freq=1/(3), mode=Timer.PERIODIC, callback=read_temperature)  
          
        # 等待一段时间，避免忙等  
        time.sleep(0.01)  
  
except KeyboardInterrupt:  
    # 清理资源  
    timer.deinit()  
    lcd.clear()  
    led_pin.off()