Raspberry Pi - Code Structure
Hardware Preparation
| 1 | × | Raspberry Pi 4 Model B | |
| 1 | × | (Optional) Screw Terminal Adapter for Raspberry Pi | |
| 1 | × | (Optional) Power Adapter for Raspberry Pi 4B | |
| 1 | × | (Optional) Plastic Case for Raspberry Pi 4B |
Or you can buy the following sensor kits:
| 1 | × | DIYables Sensor Kit (30 sensors/displays) | |
| 1 | × | DIYables Sensor Kit (18 sensors/displays) |
Disclosure: Some of the links provided in this section are Amazon affiliate links. We may receive a commission for any purchases made through these links at no additional cost to you.
Additionally, some of these links are for products from our own brand, DIYables.
Additionally, some of these links are for products from our own brand, DIYables.
Basic Structure
The Raspberry Pi code consists of following parts:
- Import required libraries
- Initialization and setup
- Main loop: is executed repeatedly, infinitely
- Exception handling (optional)
- Program exit
The are two code skeletons:
- Code Skeleton #1
# Import Required Libraries
# Initialization and Setup
# Perform one-time setup tasks here
try:
# Main Loop
while True:
# Main code logic goes here
pass # Replace with your code
except KeyboardInterrupt:
# Handle Ctrl+C interruption
print("\nExiting the program.")
# Program Exit
# Add any cleanup tasks or final actions here
- Code Skeleton #2
# Import Required Libraries
# Initialization and Setup
# Perform one-time setup tasks here
try:
# Main Loop
while True:
# Main code logic goes here
pass # Replace with your code
except KeyboardInterrupt:
# Handle Ctrl+C interruption
print("\nExiting the program.")
finally:
# Program Exit
# Add any cleanup tasks or final actions here
Raspberry Pi Example Code
The below provides example codes that blink and LED
- Example Code for Skeleton #1
# IMPORT REQUIRED LIBRARIES
import RPi.GPIO as GPIO
import time
# INITIALIZATION AND SETUP
# Set the GPIO mode to BCM
GPIO.setmode(GPIO.BCM)
# Define the GPIO pin for the LED
LED_PIN = 17 # Use GPIO pin 17
# Set up the LED pin as an output
GPIO.setup(LED_PIN, GPIO.OUT)
try:
# MAIN LOOP
while True:
# Main code logic goes here
# Turn on the LED
GPIO.output(LED_PIN, GPIO.HIGH)
# Wait for a second
time.sleep(1)
# Turn off the LED
GPIO.output(LED_PIN, GPIO.LOW)
# Wait for a second
time.sleep(1)
except KeyboardInterrupt:
# Handle Ctrl+C interruption
print("\nExiting the program.")
GPIO.cleanup() # Clean up the GPIO
- Example Code for Skeleton #2
# IMPORT REQUIRED LIBRARIES
import RPi.GPIO as GPIO
import time
# INITIALIZATION AND SETUP
# Set the GPIO mode to BCM
GPIO.setmode(GPIO.BCM)
# Define the GPIO pin for the LED
LED_PIN = 17 # Use GPIO pin 17
# Set up the LED pin as an output
GPIO.setup(LED_PIN, GPIO.OUT)
try:
# MAIN LOOP
while True:
# Main code logic goes here
# Turn on the LED
GPIO.output(LED_PIN, GPIO.HIGH)
# Wait for a second
time.sleep(1)
# Turn off the LED
GPIO.output(LED_PIN, GPIO.LOW)
# Wait for a second
time.sleep(1)
except KeyboardInterrupt:
# Exception Handling (Optional)
# Handle Ctrl+C interruption
print("\nExiting the program.")
finally:
# Program Exit
# Cleanup GPIO on exit
GPIO.cleanup()