98 lines
2.8 KiB
Python
98 lines
2.8 KiB
Python
import WIFI_CONFIG
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from network_manager import NetworkManager
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import uasyncio
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from urllib import urequest
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from picographics import PicoGraphics, DISPLAY_PICO_EXPLORER
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import time
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import ujson
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from pimoroni import RGBLED
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"""
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This Pico W example sets your Pico Explorer's screen to the current #cheerlights colour.
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Find out more about Cheerlights at https://cheerlights.com/
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If you wire up a four legged RGB LED to GP0, GP1 and GP2 (and the long leg to ground)
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it will change the colour of that too!
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"""
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URL = "http://api.thingspeak.com/channels/1417/field/2/last.json"
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UPDATE_INTERVAL = 120 # refresh interval in secs. Be nice to free APIs!
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def status_handler(mode, status, ip):
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# connect to the internets
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display.set_pen(BLACK)
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display.clear()
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display.set_pen(WHITE)
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display.text("Network: {}".format(WIFI_CONFIG.SSID), 10, 10, scale=2)
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status_text = "Connecting..."
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if status is not None:
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if status:
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status_text = "Connection successful!"
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else:
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status_text = "Connection failed!"
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display.text(status_text, 10, 30, scale=2)
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display.text("IP: {}".format(ip), 10, 60, scale=2)
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display.update()
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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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# set up wifi
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network_manager = NetworkManager(WIFI_CONFIG.COUNTRY, status_handler=status_handler)
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# set up the display
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display = PicoGraphics(display=DISPLAY_PICO_EXPLORER)
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display.set_backlight(1.0)
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# some constants we'll use for drawing
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WHITE = display.create_pen(255, 255, 255)
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BLACK = display.create_pen(0, 0, 0)
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WIDTH, HEIGHT = display.get_bounds()
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display.set_font("bitmap8")
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# set up an old school 4 pin RGB LED connected to GP0, GP1 and GP2
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led = RGBLED(0, 1, 2, invert=False)
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while True:
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# connect to wifi
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uasyncio.get_event_loop().run_until_complete(network_manager.client(WIFI_CONFIG.SSID, WIFI_CONFIG.PSK))
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# open the json file
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print(f"Requesting URL: {URL}")
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socket = urequest.urlopen(URL)
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data = ujson.load(socket)
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socket.close()
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print("Data obtained!")
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# extract hex colour from the data
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hex = data['field2']
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# and convert it to RGB
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r, g, b = hex_to_rgb(hex)
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# draw stuff on the screen
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colour = display.create_pen(r, g, b)
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display.set_pen(colour)
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display.clear()
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display.set_pen(BLACK)
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display.text(hex, 10, 10, WIDTH - 10, scale=6)
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display.text("Tweet a colour at #cheerlights to change!", 10, 130, WIDTH - 10, scale=3)
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display.update()
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print(f"Screen set to {hex}")
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# light up RGB LED
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led.set_rgb(r, g, b)
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print(f"RGB LED set to {hex}")
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# sleep
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print(f"""Sleeping for {UPDATE_INTERVAL} seconds.
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""")
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time.sleep(UPDATE_INTERVAL)
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