kopia lustrzana https://github.com/pimoroni/pimoroni-pico
112 wiersze
3.2 KiB
Python
112 wiersze
3.2 KiB
Python
# The Interstate75W example updates a pixel every five(ish) minutes
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# to display the most recent #cheerlights colour. Discover the most popular
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# colours over time, or use it as an avant garde (but colourful) 53 hour clock!
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# Find out more about the Cheerlights API at https://cheerlights.com/
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#
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# To run this example you'll need WIFI_CONFIG.py and network_manager.py from
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# the pimoroni-pico micropython/examples/common folder
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import WIFI_CONFIG
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from network_manager import NetworkManager
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import uasyncio
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import urequests
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import time
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import interstate75
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from machine import Timer
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URL = 'http://api.thingspeak.com/channels/1417/field/2/last.json'
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UPDATE_INTERVAL = 327 # refresh interval in secs. Be nice to free APIs!
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# this esoteric number is used so that a column of LEDs equates (approximately) to an hour
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def status_handler(mode, status, ip):
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# reports wifi connection status
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print(mode, status, ip)
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print('Connecting to wifi...')
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if status is not None:
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if status:
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print('Wifi connection successful!')
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else:
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print('Wifi connection failed!')
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def hex_to_rgb(hex):
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# converts a hex colour code into RGB
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h = hex.lstrip('#')
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r, g, b = (int(h[i:i + 2], 16) for i in (0, 2, 4))
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return r, g, b
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def get_data():
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# open the json file
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print(f'Requesting URL: {URL}')
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r = urequests.get(URL)
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# open the json data
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j = r.json()
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print('Data obtained!')
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r.close()
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# extract hex colour from the json data
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hex = j['field2']
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# add the new hex colour to the end of the array
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colour_array.append(hex)
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print(f'Colour added to array: {hex}')
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# remove the oldest colour in the array
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colour_array.pop(0)
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update_leds()
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def update_leds():
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# light up the LEDs
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# this step takes a second, it's doing a lot of hex_to_rgb calculations!
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print("Updating LEDs...")
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i = 0
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for x in range(width):
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for y in range(height):
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r = hex_to_rgb(colour_array[i])[0]
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g = hex_to_rgb(colour_array[i])[1]
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b = hex_to_rgb(colour_array[i])[2]
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current_colour = graphics.create_pen(r, g, b)
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graphics.set_pen(current_colour)
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graphics.pixel(x, y)
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i = i + 1
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i75.update(graphics)
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print("LEDs updated!")
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i75 = interstate75.Interstate75(display=interstate75.DISPLAY_INTERSTATE75_32X32)
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graphics = i75.display
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width = i75.width
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height = i75.height
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current_colour = graphics.create_pen(0, 0, 0)
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# set up an list to store the colours
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colour_array = ["#000000"] * height * width
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# set up wifi
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try:
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network_manager = NetworkManager(WIFI_CONFIG.COUNTRY, status_handler=status_handler)
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uasyncio.get_event_loop().run_until_complete(network_manager.client(WIFI_CONFIG.SSID, WIFI_CONFIG.PSK))
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except Exception as e:
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print(f'Wifi connection failed! {e}')
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# get the first lot of data
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get_data()
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# start timer (the timer will call the function to update our data every UPDATE_INTERVAL)
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timer = Timer(-1)
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timer.init(period=UPDATE_INTERVAL * 1000, mode=Timer.PERIODIC, callback=lambda t: get_data())
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while True:
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update_leds()
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# pause for a moment (important or the USB serial device will fail)
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time.sleep(0.001)
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