'''
 https://wokwi.com/projects/423651135158928385
'''

from machine import Pin, I2C, unique_id
import utime
import sys, os
import ssd1306
from dht import DHT22 as DHT  # 如果傳感器是 DHT11，請導入 DHT11，而不是 DHT22
# from dht import DHT11 as DHT

# define in what intervals we want to do something
INTERVAL = 2000 # do something every 2000 ms

button_down = False
TimerDone = False

oled_width = 128
oled_height = 64

currentBoard=""
I2C_FREQ = 400000

if(sys.platform=="esp8266"): # ESP8266 Pin assignment
  currentBoard="esp8266"
  led_pin = 2 # Initialize LED on GPIO2(D4)
  # button_pin = 4 # GPIO4(D2)
  I2C_SDA = 4 # GPIO4(D2)
  I2C_SCL = 5 # GIPO5(D1)
  # Initialize I2C
  i2c = I2C(scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=I2C_FREQ)
elif(sys.platform=="esp32"): # ESP32 Pin assignment
  machine_info = os.uname().machine.upper()
  if "S3" in machine_info:
    currentBoard="esp32-S3"
    print("正在初始化 ESP32-S3 的腳位...")
    led_pin = None              # 有板載 LED 時填 GPIO 編號，例如 48；沒有就維持 None
    button_pin = 0   # BOOT 鍵
    OWI_PIN = 13
    I2C_SDA = 5 # GPIO5
    I2C_SCL = 4 # GPIO4
  else:
    currentBoard="esp32"
    print("正在初始化傳統 ESP32 的腳位...")
    led_pin = 2  # Initialize LED on GPIO2
    button_pin = 35
    OWI_PIN = 15
    I2C_SDA = 21 # GPIO21
    I2C_SCL = 22 # GPIO22
  # Initialize I2C
  i2c = I2C(0, scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=I2C_FREQ)  # 初始化硬體I2C0
elif(sys.platform=="rp2"):
  currentBoard="Pi-Pico"
  led_pin = "LED"  # Initialize LED
  button_pin = 21
  OWI_PIN = 22
  I2C_SDA = 16 # GPIO16
  I2C_SCL = 17 # GPIO17
  # Initializing the I2C method for pi Pico
  i2c = I2C(0, scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=I2C_FREQ)

def button_press(pin):
  global button_down
  button_down = True

# Start Function
if __name__ == "__main__":
  print("Hello, " + currentBoard + "!")

  # 等待一段時間，確保總線初始化
  utime.sleep(0.5)

  led = Pin(led_pin, Pin.OUT) if led_pin is not None else None
  if led:
    led.value(0)

  key = Pin(button_pin, Pin.IN, Pin.PULL_UP)
  key.irq(trigger=Pin.IRQ_FALLING, handler=button_press)

  # 掃描 I2C 設備
  devices = i2c.scan()  # I2C scanning
  if len(devices) != 0:
    print('Number of I2C devices found=',len(devices))
    for device in devices:
      print("Device Hexadecimel Address= ",hex(device))
    if devices.count(0x3c) > 0:
      OLED_N = True
      oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c, addr=0x3c)
    else:
      OLED_N = False
  else:
    # raise OSError("No i2c device found!")
    OLED_N = False

  dht = DHT(Pin(OWI_PIN))  # Initialize the DHT sensor

  utime.sleep(1)    #首次啟動間隔1S讓傳感器穩定

  print("--- Start measurement ---")
  lastTime = 0

  # Read data from the sensor every 2 seconds
  try:
    while not button_down:
      currTime = utime.ticks_ms()
      #如果延時時間過短，DHT溫濕度傳感器不工作
      if utime.ticks_diff(currTime, lastTime) >= INTERVAL:
        lastTime = currTime  #save the current time.

        # 測量溫度和濕度
        dht.measure()  #調用DHT類庫中測量數據的函數
        temp = dht.temperature() # Gets the temperature in Celsius
        humi = dht.humidity()   # Gets the relative humiidity in %

        if temp==None:        # 打印測量結果
          print("DHT傳感器檢測失敗！")
        else:
          print(f"Temperature: {temp}°C, Humidity: {humi}%")
          # print("Temperature=%d°C  Humidity=%dRH" %(temp,humi))
          # print("Temperature: {:.2f}°C, humiidity: {:.2f}%".format(temp, humi))

        if OLED_N == True :
          # 將讀數顯示到控制台
          oled.fill(0)
          msg1 = f"Temp: {temp} "
          msg2 = f"Humid: {humi}%"
          oled.text(msg1, 10, 10)
          oled.text(msg2, 10, 30)
          oled.show()

        if led:
          led.value(0)

      utime.sleep_ms(100)

  except Exception as e:
    print("Error occurred while reading from sensor:", str(e))
  except KeyboardInterrupt: # 使用者中斷執行(通常是輸入^C)
    print("Stop")
  finally:
    print("Exit measurement.")