added in the wifi examples from another branch

micropython/examples/cosmic_unicorn/exchange_ticker.py

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+"""
+This example uses the Coinbase open API to collect the current exchange rates.
+Use Switch A to change to a different base exchange currency.
+"""
+
+import WIFI_CONFIG
+from network_manager import NetworkManager
+import uasyncio
+import urequests
+import time
+import math
+from cosmic import CosmicUnicorn
+from picographics import PicoGraphics, DISPLAY_COSMIC_UNICORN as DISPLAY
+import gc
+
+URL = 'https://api.coinbase.com/v2/exchange-rates?currency={0}'
+
+currencies = {"Bitcoin": "BTC", "Ethereun": "ETH", "Pound": "GBP", "Dollar": "USD", "Dogecoin": "DOGE"}
+currency_keys = list(currencies.keys())
+
+ref_currency_name = ""
+currency_name = ""
+currency_symbol = ""
+currency_rate = ""
+rate_keys = []
+
+# diplay options
+line_1_line = -2
+line_2_line = 9
+line_3_line = 20
+
+ref_currency_index = 0
+
+cycles_per_sequence = 120
+
+cu = CosmicUnicorn()
+graphics = PicoGraphics(DISPLAY)
+
+
+# for Handling the wifi connection
+def status_handler(mode, status, ip):
+    # reports wifi connection status
+    print(mode, status, ip)
+    print('Connecting to wifi...')
+    if status is not None:
+        if status:
+            print('Wifi connection successful!')
+        else:
+            print('Wifi connection failed!')
+
+
+try:
+    network_manager = NetworkManager(WIFI_CONFIG.COUNTRY, status_handler=status_handler)
+    uasyncio.get_event_loop().run_until_complete(network_manager.client(WIFI_CONFIG.SSID, WIFI_CONFIG.PSK))
+except Exception as e:
+    print(f'Wifi connection failed! {e}')
+
+
+def get_data(currency_selected):
+
+    graphics.set_pen(graphics.create_pen(20, 20, 20))
+    graphics.clear()
+    graphics.set_pen(graphics.create_pen(100, 100, 100))
+    graphics.text("Get", 0, 10, scale=1, spacing=1)
+    graphics.text("data", 8, 16, scale=1, spacing=1)
+    cu.update(graphics)
+    gc.collect()
+    # open the json file
+    print('Requesting URL:')
+    print(URL.format(currencies[currency_selected]))
+    r = urequests.get(URL.format(currencies[currency_selected]))
+    gc.collect()
+    # open the json data
+    data_obj = r.json()
+    print('Data obtained!')
+    r.close()
+    return data_obj
+
+
+def calculate_xpos(length, cycle):
+    cycle_phase = math.cos(math.pi * cycle / (cycles_per_sequence / 2))
+    pos_x = int((-(length / 2) * 10) - (length / 2) * 10 * cycle_phase)
+    return pos_x
+
+
+def update_display(cycle):
+
+    graphics.set_pen(graphics.create_pen(20, 20, 20))
+    graphics.clear()
+    graphics.set_pen(graphics.create_pen(100, 0, 0))
+    graphics.text(ref_currency_name, calculate_xpos((len(ref_currency_name)), cycle), line_1_line, scale=2, spacing=1)
+    graphics.set_pen(graphics.create_pen(100, 100, 0))
+    if len(currency_symbol) > 3:
+        graphics.text(currency_symbol, calculate_xpos((len(currency_symbol)), cycle), line_2_line, scale=2, spacing=1)
+    else:
+        graphics.text(currency_symbol, 0, line_2_line, scale=2, spacing=1)
+    graphics.set_pen(graphics.create_pen(0, 100, 100))
+    graphics.text(currency_rate, calculate_xpos((len(currency_rate)), cycle), line_3_line, scale=2, spacing=1)
+
+
+def update_base_currency(index):
+    fetched_data = 0
+    global rates, rate_keys, currency_symbol, currency_rate, ref_currency_name
+    fetched_data = get_data(currency_keys[index])
+    rates = fetched_data['data']['rates']
+    rate_keys = list(rates.keys())
+    currency_symbol = rate_keys[index]
+    currency_rate = str(rates[rate_keys[index]])
+    ref_currency_name = "{0}-{1}".format(currency_keys[index], currencies[currency_keys[index]])
+    gc.collect()
+
+
+update_base_currency(ref_currency_index)
+update_display(0)
+cu.update(graphics)
+cycle_count = 0
+symbol_index = 0
+print("Display {0} {1}".format(currency_symbol, currency_rate))
+
+while 1:
+    if cycle_count > 4 * cycles_per_sequence:
+        cycle_count = 0
+        symbol_index += 1
+        if symbol_index > len(currency_keys):
+            symbol_index = 0
+            print("Display {0} {1}".format(currency_symbol, currency_rate))
+        currency_symbol = rate_keys[symbol_index]
+        currency_rate = rates[rate_keys[symbol_index]]
+
+    if (cu.is_pressed(CosmicUnicorn.SWITCH_A)):
+        ref_currency_index += 1
+        if (ref_currency_index > len(currency_keys)):
+            ref_currency_index = 0
+        update_base_currency(ref_currency_index)
+
+    if (cu.is_pressed(CosmicUnicorn.SWITCH_B)):
+        cycle_count = 0
+        symbol_index += 1
+
+        if symbol_index > len(rate_keys):
+            symbol_index = 0
+        currency_symbol = rate_keys[symbol_index]
+        currency_rate = rates[rate_keys[symbol_index]]
+
+    update_display(cycle_count)
+    cu.update(graphics)
+    cycle_count += 1
+    time.sleep(0.1)

micropython/examples/cosmic_unicorn/http_text/html_text.py

@@ -0,0 +1,198 @@
+import time
+from cosmic import CosmicUnicorn
+from picographics import PicoGraphics, DISPLAY_COSMIC_UNICORN as DISPLAY
+import WIFI_CONFIG
+from network_manager import NetworkManager
+import uasyncio as asyncio
+import uasyncio.core
+from tinyweb.server import webserver
+
+'''
+Display scrolling wisdom, quotes or greetz... from the internetz!
+
+You can adjust the brightness with LUX + and -.
+
+Requires network_manager.py , WIFI_CONFIG.py, logging.mpy and tinyweb from micropython/examples/common
+You'll also need index.html to be saved alongside this file.
+'''
+
+# Server Settings
+host = "0.0.0.0"
+port = 80
+
+
+def convert_colour(colour_str):
+    colour_str = colour_str.split(',')
+    print(colour_str)
+    return colour_str[0], colour_str[1], colour_str[2]
+
+
+class text:
+
+    def get(self, data):
+        global MESSAGE, MESSAGE_COLOUR, BACKGROUND_COLOUR
+        print(data)
+        if 'text' in data.keys():
+            MESSAGE = data['text']
+        if 'colourfg' in data.keys():
+            MESSAGE_COLOUR = convert_colour(data['colourfg'])
+        if 'colourbg' in data.keys():
+            BACKGROUND_COLOUR = convert_colour(data['colourbg'])
+        return {'message': 'text updated'}, 201
+
+    def post(self, data):
+
+        return {'message': 'text updated'}, 201
+
+
+def status_handler(mode, status, ip):
+    global MESSAGE
+    print("Network: {}".format(WIFI_CONFIG.SSID))
+    status_text = "Connecting..."
+    if status is not None:
+        if status:
+            status_text = "Connection successful!"
+        else:
+            status_text = "Connection failed!"
+
+    print(status_text)
+    print("IP: {}".format(ip))
+    MESSAGE = "{}".format(ip)
+
+
+# Create web server application
+app = webserver()
+
+# Static page
+html_file = open('index.html', 'r')
+
+# WIFI settings
+WIFI_COUNTRY = "GB"  # Changeme!
+
+
+# Index page
+@app.route('/')
+async def index(request, response):
+    # Start HTTP response with content-type text/html
+    await response.start_html()
+    # Send actual HTML page
+    await response.send(html_file.read())
+
+
+# HTTP redirection
+@app.route('/redirect')
+async def redirect(request, response):
+    # Start HTTP response with content-type text/html
+    await response.redirect('/')
+
+# constants for controlling scrolling text
+PADDING = 5
+MESSAGE_COLOUR = (255, 255, 255)
+OUTLINE_COLOUR = (0, 0, 0)
+BACKGROUND_COLOUR = (10, 0, 96)
+MESSAGE = "Connecting"
+HOLD_TIME = 2.0
+STEP_TIME = 0.075
+
+# create galactic object and graphics surface for drawing
+cu = CosmicUnicorn()
+graphics = PicoGraphics(DISPLAY)
+
+width = CosmicUnicorn.WIDTH
+height = CosmicUnicorn.HEIGHT
+
+
+# function for drawing outlined text
+def outline_text(text, x, y):
+    graphics.set_pen(graphics.create_pen(int(OUTLINE_COLOUR[0]), int(OUTLINE_COLOUR[1]), int(OUTLINE_COLOUR[2])))
+    graphics.text(text, x - 1, y - 1, -1, 1)
+    graphics.text(text, x, y - 1, -1, 1)
+    graphics.text(text, x + 1, y - 1, -1, 1)
+    graphics.text(text, x - 1, y, -1, 1)
+    graphics.text(text, x + 1, y, -1, 1)
+    graphics.text(text, x - 1, y + 1, -1, 1)
+    graphics.text(text, x, y + 1, -1, 1)
+    graphics.text(text, x + 1, y + 1, -1, 1)
+
+    graphics.set_pen(graphics.create_pen(int(MESSAGE_COLOUR[0]), int(MESSAGE_COLOUR[1]), int(MESSAGE_COLOUR[2])))
+    graphics.text(text, x, y, -1, 1)
+
+
+def run():
+    # Setup wifi
+    network_manager = NetworkManager(WIFI_COUNTRY, status_handler=status_handler)
+
+    app.add_resource(text, '/update')
+
+    # Connect to Wifi network
+    asyncio.get_event_loop().run_until_complete(network_manager.client(WIFI_CONFIG.SSID, WIFI_CONFIG.PSK))
+    while (not network_manager.isconnected()):
+        time.sleep(0.1)
+
+
+cu.set_brightness(0.5)
+
+# Start wifi connection
+run()
+
+
+async def message_update():
+    global MESSAGE
+    last_time = time.ticks_ms()
+    STATE_PRE_SCROLL = 0
+    STATE_SCROLLING = 1
+    STATE_POST_SCROLL = 2
+
+    shift = 0
+    state = STATE_PRE_SCROLL
+
+    # set the font
+    graphics.set_font("bitmap8")
+
+    # calculate the message width so scrolling can happen
+    msg_width = graphics.measure_text(MESSAGE, 1)
+    while 1:
+
+        msg_width = graphics.measure_text(MESSAGE, 1)
+        time_ms = time.ticks_ms()
+
+        if cu.is_pressed(CosmicUnicorn.SWITCH_BRIGHTNESS_UP):
+            cu.adjust_brightness(+0.01)
+
+        if cu.is_pressed(CosmicUnicorn.SWITCH_BRIGHTNESS_DOWN):
+            cu.adjust_brightness(-0.01)
+
+        if state == STATE_PRE_SCROLL and time_ms - last_time > HOLD_TIME * 1000:
+            if msg_width + PADDING * 2 >= width:
+                state = STATE_SCROLLING
+            last_time = time_ms
+
+        if state == STATE_SCROLLING and time_ms - last_time > STEP_TIME * 1000:
+            shift += 1
+            if shift >= (msg_width + PADDING * 2) - width - 1:
+                state = STATE_POST_SCROLL
+            last_time = time_ms
+
+        if state == STATE_POST_SCROLL and time_ms - last_time > HOLD_TIME * 1000:
+            state = STATE_PRE_SCROLL
+            shift = 0
+            last_time = time_ms
+
+        graphics.set_pen(graphics.create_pen(int(BACKGROUND_COLOUR[0]), int(BACKGROUND_COLOUR[1]), int(BACKGROUND_COLOUR[2])))
+        graphics.clear()
+
+        outline_text(MESSAGE, x=PADDING - shift, y=11)
+
+        # update the display
+        cu.update(graphics)
+
+        # pause for a moment (important or the USB serial device will fail)
+        await asyncio.sleep(0.001)
+
+
+# The following is required to run both the web server and the scrolling text coherently
+app._server_coro = app._tcp_server(host, port, app.backlog)
+loop = asyncio.get_event_loop()
+t1 = loop.create_task(message_update())
+t2 = loop.create_task(app._server_coro)
+loop.run_forever()