import pin
import sht30
import gpio
import os

i2cx = 0   # SHT30是一種i2c設備，位于0號i2c上
freq = 400000  # i2c通信頻率
sda = gpio.make_id([0, 'A', 0])  # 計算sda所對應的引腳號
scl = gpio.make_id([0, 'A', 1])   # 計算scl所對應的引腳號

th = sht30.SHT30(i2cx, sda, scl, freq)   # 創建名為th的SHT30對象
th.open()  # 通過th對象打開SHT30設備

lpin = gpio.make_id([0, 'A', 2])  # 計算接入LED燈的引腳號

light = pin.Pin(lpin)  # 創建LED燈對象

while True :
    t = th.temperature()  # 獲取溫度數據
    h = th.humidity()      # 獲取濕度數據
    
    if t != None : 
        print('temperature = ' + str(t))
        
    if h != None : 
        print('humidity = ' + str(h))
        
    if (18 <= t) and (t <= 25) :
        light.low()      # 若當前溫度在體感舒適度范圍內，則關閉LED燈
    else :
        light.change() # 若當前溫度不在體感舒適度范圍內，則改變LED燈的狀態，即：閃爍
        
    os.sleep(1)

'''
   This is just a demo for interface definition.
'''
class Pin:
    is_high = False   
    def __init__(self, pin_num):
        pass
        
    def high(self):
        # output 1
        self.is_high = True
        
    def low(self):
        # output 0
        self.is_high = False
        
    def status(self):
        return 1 if self.is_high else 0
        
    def change(self):
        if self.is_high:
            self.low()
        else:
            self.high()
            
    def __del__(self):
        pass

class SHT30:
    sht30_addr = 0x44
    write_cmd = (sht30_addr << 1) | 0x00
    read_cmd = (sht30_addr << 1) | 0x01

    def __init__(self, i2cx, sda, scl, freq):
        pass

    def open(self):
        pass
    
    def close(self):
        pass

    def temperature(self):
        return None

    def humidity(self):
        return None
        
    def __del__(self):
        pass