Project Logs

Collapse

• Code

  deʃhipu • 04/01/2017 at 19:00 • 0 comments

  The code is far from pretty, but it works (at least as long as something goes wrong and it crashes). It gets the current weather information from the OpenWeatherMap API, and displays the icon and temperature, alternating them every 4 seconds. The particular prototype shield I used for testing also has 2 buttons, but they are not used by the code.

  import utime
  from machine import I2C, Pin
  from ht16k33_matrix import Matrix8x8
  import json
  import urequests
  
  
  API_KEY = "generate your own"
  CITY = "Zuirich"
  ICONS = {
      '00': (
          0b00000000,
          0b01000010,
          0b00100100,
          0b00011000,
          0b00011000,
          0b00100100,
          0b01000010,
          0b00000000,
      ),
      '01': (
          0b00010000,
          0b01010010,
          0b00111100,
          0b00111111,
          0b11111100,
          0b00111100,
          0b01001010,
          0b00001000,
      ),
      '02': (
          0b00010000,
          0b01010100,
          0b00111000,
          0b11111110,
          0b01000100,
          0b10000010,
          0b10000001,
          0b01111110,
      ),
      '03': (
          0b00000000,
          0b00000000,
          0b00000000,
          0b00111000,
          0b01000100,
          0b10000010,
          0b10000001,
          0b01111110,
      ),
      '04': (
          0b01100000,
          0b10011000,
          0b10000100,
          0b01111000,
          0b01000100,
          0b10000010,
          0b10000001,
          0b01111110,
      ),
      '09': (
          0b00111100,
          0b01111110,
          0b11111111,
          0b11111111,
          0b10001001,
          0b00001000,
          0b00101000,
          0b00111000,
      ),
      '10': (
          0b00101010,
          0b00011100,
          0b01111111,
          0b00011100,
          0b01111010,
          0b11111100,
          0b00010000,
          0b00110000,
      ),
      '11': (
          0b00001111,
          0b00011110,
          0b00111100,
          0b01111111,
          0b11111110,
          0b00000100,
          0b00001000,
          0b00010000,
      ),
      '13': (
          0b01010010,
          0b11010011,
          0b00111100,
          0b00100111,
          0b11100100,
          0b00111100,
          0b11001011,
          0b01001010,
      ),
      '50': (
          0b11111111,
          0b00000000,
          0b11111111,
          0b00000000,
          0b11111111,
          0b00000000,
          0b11111111,
          0b00000000,
      ),
  }
  DIGITS = {
      ' ': (
          0b0000,
          0b0000,
          0b0000,
          0b0000,
          0b0000,
      ),
      '0': (
          0b0111,
          0b0101,
          0b0101,
          0b0101,
          0b0111,
      ),
      '1': (
          0b0010,
          0b0010,
          0b0010,
          0b0010,
          0b0010,
      ),
      '2': (
          0b0111,
          0b0001,
          0b0111,
          0b0100,
          0b0111,
      ),
      '3': (
          0b0111,
          0b0001,
          0b0111,
          0b0001,
          0b0111,
      ),
      '4': (
          0b0101,
          0b0101,
          0b0111,
          0b0001,
          0b0001,
      ),
      '5': (
          0b0111,
          0b0100,
          0b0111,
          0b0001,
          0b0111,
      ),
      '6': (
          0b0111,
          0b0100,
          0b0111,
          0b0101,
          0b0111,
      ),
      '7': (
          0b0111,
          0b0001,
          0b0001,
          0b0001,
          0b0001,
      ),
      '8': (
          0b0111,
          0b0101,
          0b0111,
          0b0101,
          0b0111,
      ),
      '9': (
          0b0111,
          0b0101,
          0b0111,
          0b0001,
          0b0001,
      ),
      ':': (
          0b0000,
          0b0001,
          0b0000,
          0b0001,
          0b0000,
      ),
      '.': (
          0b0000,
          0b0000,
          0b0000,
          0b0000,
          0b0001,
      ),
      '-': (
          0b0000,
          0b0000,
          0b0001,
          0b0000,
          0b0000,
      ),
  }
  
  matrix = Matrix8x8(I2C(-1, Pin(5), Pin(4)))
  wait = 0
  
  
  def show(image, dx=0, dy=0):
      for y, row in enumerate(image):
          bit = 1
          for x in range(8):
              matrix.pixel(dx + x, dy + y, row & bit)
              bit <<= 1
      matrix.show()
  
  
  def show_text(text):
      x = 0
      for c in reversed(text):
          if c in '.:-':
              show(DIGITS.get(c, DIGITS[' ']), x - 1, 1)
          else:
              show(DIGITS.get(c, DIGITS[' ']), x, 1)
              x += 4
  
  
  def get_weather():
      r = urequests.get("http://api.openweathermap.org/data/2.5/weather"
                        "?q=%s&appid=%s" % (CITY, API_KEY)).json()
      return r["weather"][0]["icon"], int(r["main"]["temp"] - 273.15)
  
  
  while True:
      if wait <= 0:
          icon, temp = get_weather()
          wait = 60
      if icon[-1] == 'd':
          matrix.brightness(9)
      else:
          matrix.brightness(2)
      matrix.fill(0)
      show_text('%2d' % temp)
      utime.sleep(4)
      show(ICONS[icon[:2]])
      utime.sleep(4)
      wait -= 1
  

  
  

View project log