5. Wifi

A powerful feature of the Pi Pico is it's ability to connect to the internet to send and receive data. Here's we will connect to an Adafruit server to get the local time and display it on an Oled Screen

https://www.youtube.com/watch?v=Sfzo4xm5eX8&t=11s&ab_channel=BLASTERTECHNOLOGY

Internet Time Alarm Clock

Copy and paste this key into the code: aio_GeLK691wqaYsOf1CDcbAjhH8FUqk

Copy and paste this key into the code: aio_GeLK691wqaYsOf1CDcbAjhH8FUqk

import os, ipaddress, wifi, ssl, socketpool, adafruit_requests
import time
import adafruit_ahtx0
import adafruit_rgbled
import board, busio, displayio, digitalio, terminalio
from i2cdisplaybus import I2CDisplayBus
from adafruit_display_text import label
import adafruit_displayio_ssd1306

# Setup
displayio.release_displays()
i2c = busio.I2C(board.GP17, board.GP16)  # uses board.SCL and board.SDA
display_bus = I2CDisplayBus(i2c, device_address=0x3c)
display = adafruit_displayio_ssd1306.SSD1306(display_bus, width=128, height=64)
display.root_group = displayio.Group()

led = digitalio.DigitalInOut(board.GP13)
led.direction = digitalio.Direction.OUTPUT

print("Connecting to WiFi")
wifi.radio.connect("Grid", "Wu@/=oPi3[/~S$")
print("Connected to WiFi")

#!!!!COPY AND PASTE THE ACCESS KEY HERE
key = ""
TIME_URL = f"https://io.adafruit.com/api/v2/flatres/integrations/time/strftime?x-aio-key={key}"
TIME_URL += "&fmt=%25H%3A%25M"

display.root_group = displayio.Group()
text = "Connected"
text_area = label.Label(terminalio.FONT, text=text, x=33, y=32)
display.root_group.append(text_area)
time.sleep(1)

pool = socketpool.SocketPool(wifi.radio)

#  prints IP address to REPL
print("My IP address is", wifi.radio.ipv4_address)

#  pings Google
try:
    ipv4 = ipaddress.ip_address("8.8.4.4")
    print("Ping google.com: %f ms" % (wifi.radio.ping(ipv4)*1000))
except Exception as e:
        print('Error')

pool = socketpool.SocketPool(wifi.radio)
requests = adafruit_requests.Session(pool, ssl.create_default_context())

light = False
oldTime = ""

alarmTime = '14:02'

while True:
    print("Fetching time from", TIME_URL)
    try:
        response = requests.get(TIME_URL)
        print(response.text)
        
        #Check the Alarm
        if response.text == alarmTime:
            led.value = True
        else:
            led.value = False
            
        #Write time to screen if it has changed    
        if response.text == oldTime:
            time.sleep(0.1)
        else:
            display.root_group = displayio.Group()
            text = response.text
            oldTime = text
            text_area = label.Label(terminalio.FONT, text=text, scale=3, x=20, y=22)
            display.root_group.append(text_area)
        response.close() 
        
    except Exception as e:
        print('Error')
    
    time.sleep(1)
   
#CHALLENGES

#1 Move the time so that it is displayed in the center of the screen
#2 Create a splash screen that is displayed until the wifi is connected
#3 Make the LED blink when the alarm goes off
#4 Make a buzzer sounds when the alarm goes off