Raspberry Pi 400 Official Kit Documentation
The Raspberry Pi 400 Official Kit is a compact, all-in-one computer built into a keyboard. It is a powerful and versatile device that can be used for a wide range of applications, from basic computing to advanced IoT projects.
CPU: Broadcom BCM2711C0 quad-core Cortex-A72 (ARM v8) 64-bit SoC @ 1.8GHz
RAM: 4GB LPDDR4-400
Storage: 16GB eMMC Flash storage
Operating System: Raspberry Pi OS (based on Linux)
Connectivity: Dual-band 802.11ac wireless, Bluetooth 5.0, Gigabit Ethernet, USB 3.0, HDMI
Power consumption: 5V, 3A
### Example 1: Basic Python Script for GPIO Control
In this example, we will use the Raspberry Pi 400 to control an LED connected to one of the GPIO pins.
Raspberry Pi 400 Official Kit
LED
Resistor (1k)
Breadboard
Jumper wires
Raspberry Pi OS (latest version)
Python 3.x installed
Code:
```python
import RPi.GPIO as GPIO
import time
# Set up GPIO mode
GPIO.setmode(GPIO.BCM)
# Set up the LED pin as an output
GPIO.setup(17, GPIO.OUT)
try:
while True:
# Turn the LED on
GPIO.output(17, GPIO.HIGH)
time.sleep(1)
# Turn the LED off
GPIO.output(17, GPIO.LOW)
time.sleep(1)
except KeyboardInterrupt:
# Clean up GPIO on exit
GPIO.cleanup()
```
Explanation:
This code uses the RPi.GPIO library to control the GPIO pins on the Raspberry Pi 400. We set up the LED pin (GPIO 17) as an output and use a loop to toggle the LED on and off every second.
### Example 2: IoT-based Weather Station using Python and API
In this example, we will use the Raspberry Pi 400 to create a basic weather station that retrieves weather data from an API and displays it on an LCD screen.
Raspberry Pi 400 Official Kit
LCD screen (16x2)
Breadboard
Jumper wires
Internet connection
Raspberry Pi OS (latest version)
Python 3.x installed
`requests` library installed
`py_lcd` library installed (for LCD screen control)
Code:
```python
import requests
import py_lcd
# Set up the LCD screen
lcd = py_lcd.LCD(0x27, 16, 2)
# API endpoint for weather data
api_url = "http://api.openweathermap.org/data/2.5/weather"
# API key (replace with your own)
api_key = "YOUR_API_KEY"
try:
while True:
# Retrieve weather data from API
response = requests.get(api_url, params={"q": "London,UK", "appid": api_key})
data = response.json()
# Extract temperature and humidity from data
temp = data["main"]["temp"]
humidity = data["main"]["humidity"]
# Display weather data on LCD screen
lcd.clear()
lcd.print("Temp: {:.1f}C".format(temp - 273.15))
lcd.print("Humidity: {:.0f}%".format(humidity))
# Wait 10 seconds before updating again
time.sleep(10)
except KeyboardInterrupt:
# Clean up LCD screen on exit
lcd.clear()
```
Explanation:
This code uses the `requests` library to retrieve weather data from the OpenWeatherMap API. We then use the `py_lcd` library to control the LCD screen and display the temperature and humidity data. The code runs in an infinite loop, updating the LCD screen every 10 seconds.
These examples demonstrate the versatility and ease of use of the Raspberry Pi 400 Official Kit in various IoT contexts.