import max7219
from machine import Pin, SPI,I2C,RTC
from time import sleep, 
from utime import sleep_ms, ticks_us
from ssd1306 import SSD1306_I2C
import framebuf
spi = SPI(0, baudrate=10000000, polarity=1, phase=0, sck=Pin(2), mosi=Pin(3))
ss = Pin(5, Pin.OUT)


sensor_temp = machine.ADC(3)
conversion_factor = 3.3 / 65535

rtc=RTC()

ancho= 128
alto=64
i2c=I2C(1, scl=Pin(19), sda=Pin(18))
oled=SSD1306_I2C(ancho,alto, i2c)

led=machine.Pin(25, machine.Pin.OUT)

oled.rect(0,0,127,15,1)
oled.rect(0,16,127,47,1)
oled.text("CPU",49,3)


class DHT22():
  def __init__(self,gpio):
    self.pin=gpio
    self.pin=Pin(15,mode=Pin.OUT)
    self.pin.high()
    self.ckecksum=0
    self.temperatura=0
    self.humedad=0
    sleep_ms(1)

  def getReading(self):
    DHT=self.pin
    DHT.low()
    sleep_ms(1)
    DHT.init(mode=Pin.IN)
    for i in range(2):
      while DHT.value()==1:
        pass
      while DHT.value()==0:
        pass
    data=0
    t1=ticks_us()
    for i in range(32):
      while DHT.value()==1:
        pass
      while DHT.value()==0:
        pass
      t2=ticks_us()
      data=data<<1
      data=data|((t2-t1)>100)
      t1=t2
    checksum=0
    for i in range(8):
      while DHT.value()==1:
        pass
      while DHT.value()==0:
        pass
      t2=ticks_us()
      checksum=checksum<<1
      checksum=checksum|((t2-t1)>100)
      t1=t2
    byte1=(data>>24&0xFF)
    byte2=(data>>16&0xFF)
    byte3=(data>>8&0xFF)
    byte4=(data & 0xFF)
    self.checksum=(checksum==(byte1+byte2+byte3+byte4)&0xFF)
    self.humedad=((byte1<<8)|byte2)/10.0
    neg=byte3 & 0x80
    self.temperatura=(byte3<<8 | byte4)/10.0
    if neg>0:
      self.temperatura=-self.temperatura

while True:
    sleep_ms(10)
    dht=DHT22(15)
    dht.getReading()
    sleep_ms(100)
    msg="Rafael, "+"T:"+str(dht.temperatura)+" C, "+"H:"+str(dht.humedad)+ " %"
    
    length = len(msg)
    length = (length*8)
    
  
    display = max7219.Matrix8x8(spi, ss, 4)
    display.brightness(1)   # ajuste de intensidad 1 a 15
    display.fill(0)
    display.show()
    sleep(0.2)
    for x in range(32, -length, -1):
        display.text(msg ,x,0,1)
        display.show()
        sleep(0.1)
        display.fill(0)
    
while 1:
    t = rtc.datetime()
    h = t[4]
    m = t[5]
    s = t[6]
    reading = sensor_temp.read_u16() * conversion_factor 
    temp = 27 - (reading - 0.706)/0.001721
    
    if 0<=s<=59:
        
        oled.fill_rect(1,17,125,40,0)
        oled.text("Temp:",5,45)
        oled.text(str(temp),45,45)
        
        oled.text(str(h),27,25)
        oled.text(":",42,25)
        oled.text(str(m),52,25)
        oled.text(":",67,25)
        oled.text(str(s),77,25)
        
        oled.show()
        print(temp)
        sleep_ms(1000)