52 lines
1.9 KiB
Python
52 lines
1.9 KiB
Python
# SPDX-FileCopyrightText: 2019 Limor Fried for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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This example will access the coindesk API, grab a number like bitcoin value in
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USD, multiply it by your # of bitcoins and display it on a screen
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If you can find something that spits out JSON data, we can display it!
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"""
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import time
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import board
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from adafruit_pyportal import PyPortal
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# You can display in 'GBP', 'EUR' or 'USD'
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CURRENCY = 'USD'
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NUM_BITCOINS = 3.14 # how many bitcoins to display
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# Set up where we'll be fetching data from
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DATA_SOURCE = "https://api.coindesk.com/v1/bpi/currentprice.json"
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DATA_LOCATION = ['bpi', CURRENCY, 'rate_float']
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# We will convert the value from coindesk into a string that calculates our
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# total bitcoin value!
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def text_transform(val):
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format_str = "{:,.2f} Bitcoins\n = {:,d}"
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if CURRENCY == 'USD':
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format_str = "{:,.2f} Bitcoins\n = ${:,d}"
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if CURRENCY == 'EUR':
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format_str = "{:,.2f} Bitcoins\n = €{:,d}"
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if CURRENCY == 'GBP':
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format_str = "{:,.2f} Bitcoins\n = £{:,d}"
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return format_str.format(NUM_BITCOINS, int(val*NUM_BITCOINS))
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# the current working directory (where this file is)
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cwd = ("/"+__file__).rsplit('/', 1)[0]
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pyportal = PyPortal(url=DATA_SOURCE, json_path=DATA_LOCATION,
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status_neopixel=board.NEOPIXEL,
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default_bg=cwd+"/bitcoin_background.bmp",
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text_font=cwd+"/fonts/Arial-BoldItalic-12-Complete.bdf",
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text_position=(192, 130),
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text_color=0x0,
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text_transform=text_transform)
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pyportal.preload_font() # preload alphanums
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pyportal.preload_font((0x00A3, 0x20AC)) # preload gbp/euro symbol
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while True:
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try:
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value = pyportal.fetch()
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print("Response is", value)
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except (ValueError, RuntimeError) as e:
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print("Some error occured, retrying! -", e)
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time.sleep(3*60) # wait 3 minutes
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