from machine import Pin
import time
import random  #生成随机数（做 “模拟波动”）
# Wokwi 更稳的导入写法
from dht import DHT22  #专门驱动 DHT22 传感器

# 关键：Wokwi 常用 GPIO15（D15）
sensor = DHT22(Pin(15))  
#定义量程（DHT22 真实范围）
TEMP_MIN = -40
TEMP_MAX = 80
HUMI_MIN = 0
HUMI_MAX = 100

if __name__ == "__main__":
    time.sleep(1)
    while True:
        try:
            #读取传感器原始数据
            sensor.measure()
            base_temp = sensor.temperature()#真实温度传感器读数
            base_humi = sensor.humidity()

            # 随机扰动，给温度加随机小波动
            temp_noise = random.uniform(-0.5, 0.5)#温度测量精度在0.5°
            noisy_temp = base_temp + temp_noise
            noisy_temp = max(TEMP_MIN, min(noisy_temp, TEMP_MAX))#防止温度跑出 -40℃ ~ 80℃ 的传感器量程
            #给湿度加随机波动
            humi_noise = random.uniform(-0.02, 0.02)#湿度测量精度在2%RH，取0.02跳度更自然
            noisy_humi = base_humi + humi_noise
            noisy_humi = max(HUMI_MIN, min(noisy_humi, HUMI_MAX))#防止湿度跑出 0–100%RH传感器量程
            print("原始温湿度：" )
            print("temp=%.2f℃  humi=%.2f%%RH" % (base_temp, base_humi))
            print("调整后温湿度：" )
            print("temp=%.2f℃  humi=%.2f%%RH" % (noisy_temp, noisy_humi))
            print("----------------------------------" )
        except Exception as e:
            print("DHT22传感器检测失败！错误：", e)
        
        time.sleep(2)