from machine import Pin, ADC
import network
import dht
import time
import urequests

DHTPIN = Pin(14, Pin.IN) 
DHT = dht.DHT22(DHTPIN)       #溫溼度感測器
LED = Pin(1, Pin.OUT) #警報燈
ADC1 = ADC(4)         #水位高度
SW1 = Pin(38, Pin.IN, Pin.PULL_UP)

#ADC電壓偵測
def ADC_Read(ADC_channel):
    value = ADC_channel.read()
    return value
#按鈕反彈跳偵測
def SW_Scan(sw_name):
    if(sw_name.value() == 0):
        time.sleep_ms(20)
        if(sw_name.value()==0):
            while True:
                if(sw_name.value()==1):
                    time.sleep_ms(20)
                    if(sw_name.value()==1):
                        break
        return 1
    return 0
#連線及API設定
sta=network.WLAN(network.STA_IF)
sta.active(True)
sta.connect('Wokwi-GUEST','')
while not sta.isconnected() :
    pass
host='http://api.thingspeak.com'
api_key='JBL1XAC70DRE9BAA'

i=0
while True:
    h=t=0
    adc_value=0
    #溫、濕、水位紀錄(紀錄5次)
    for n in range(5):
        DHT.measure()               
        t+=DHT.temperature()              
        h+=DHT.humidity()                 
        adc_value += ADC_Read(ADC1)
        #增加按鍵偵測敏感度每10MS做1次偵測(含IF檢測超過3秒體感不出來)
        for b in range(300):
            if(SW_Scan(SW1)==1):
                i+=1
                if(i%2==0):
                    print("Warning disable!!")
                    LED.value(0)
                if(i%2==1):
                    print("Warning! SW Touched!")
                    LED.value(1)
            time.sleep_ms(10)
    #計算溫、濕、水位平均數
    t/=5
    h/=5
    adc_value/=5
    #水位換算%數
    adc_value = int((adc_value/4095)*100)
    print("當前水位", str(adc_value),"%")
    #水位警報
    if(adc_value<30):
        print("Warning! Water level is too low!")
        LED.value(1)
    elif(adc_value>=30):
        LED.value(0)
    #資料上傳
    url='%s/update?api_key=%s&field1=%s&field2=%s&field3=%s' %(host, api_key, t, h, adc_value)
    r=urequests.get(url)
    print('response=', r.text)
    #避免間隔小於15秒使ThingSpeak不紀錄資料
    time.sleep(1)