# 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

{% embed url="<https://www.youtube.com/watch?v=scWj1BMRHUA&ab_channel=Vsauce>" %}

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

{% embed url="<https://www.youtube.com/watch?v=sMHzfigUxz4&ab_channel=ByteByteGo>" %}

## Internet Time Alarm Clock

{% hint style="info" %}
Copy and paste this key into the code: **aio\_GeLK691wqaYsOf1CDcbAjhH8FUqk**
{% endhint %}

<figure><img src="https://683661518-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LoUl0bEh9qy_wuo9uJ4%2Fuploads%2FXjcwhxJ7nZujQiYHHEP5%2Fimage.png?alt=media&#x26;token=c11e65d4-641b-4854-bb9d-2ce669dfbab1" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
Copy and paste this key into the code: **aio\_GeLK691wqaYsOf1CDcbAjhH8FUqk**
{% endhint %}

```python
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
```


---

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