In this example, you'll use the adafruit_requests library to fetch a text response from the Adafruit Quotes PHP script. Each time the URL is requested, it returns a new quote from a large database of quotes.
Code the Requests Test
Once you've finished setting up your Pico W with CircuitPython, you can access the code and necessary libraries by downloading the Project Bundle.
To do this, click on the Download Project Bundle button in the window below. It will download as a zipped folder.
# SPDX-FileCopyrightText: 2022 Liz Clark for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import os
import time
import ssl
import wifi
import socketpool
import microcontroller
import adafruit_requests
# adafruit quotes URL
quotes_url = "https://www.adafruit.com/api/quotes.php"
# connect to SSID
wifi.radio.connect(os.getenv('CIRCUITPY_WIFI_SSID'), os.getenv('CIRCUITPY_WIFI_PASSWORD'))
pool = socketpool.SocketPool(wifi.radio)
requests = adafruit_requests.Session(pool, ssl.create_default_context())
while True:
try:
# pings adafruit quotes
print("Fetching text from %s" % quotes_url)
# gets the quote from adafruit quotes
response = requests.get(quotes_url)
print("-" * 40)
# prints the response to the REPL
print("Text Response: ", response.text)
print("-" * 40)
response.close()
# delays for 1 minute
time.sleep(60)
# pylint: disable=broad-except
except Exception as e:
print("Error:\n", str(e))
print("Resetting microcontroller in 10 seconds")
time.sleep(10)
microcontroller.reset()
Upload the Code and Libraries to the Pico W
After downloading the Project Bundle, plug your Pico W into the computer's USB port with a known good USB data+power cable. You should see a new flash drive appear in the computer's File Explorer or Finder (depending on your operating system) called CIRCUITPY. Unzip the folder and copy the following items to the Pico W's CIRCUITPY drive.
- lib folder
- code.py
Your Pico W CIRCUITPY drive should look like this after copying the lib folder and the code.py file.
Add Your settings.toml File
Remember to add your settings.toml file as described in the Create Your settings.toml File page earlier in the guide. You'll need to include your WIFI_SSID and WIFI_PASSWORD in the file.
CIRCUITPY_WIFI_SSID = "your-ssid-here" CIRCUITPY_WIFI_PASSWORD = "your-ssid-password-here"
Once everything is saved to the CIRCUITPY drive, connect to the serial console to see the data printed out!
Every 60 seconds, a request will be made to the Adafruit quotes URL. Then, the response will be printed to the REPL. The response includes the quote text and the author of the quote.
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