Nice tools to detect GPIOs in Rapsbery pi

Test_GPIO_FOR_Raspberry.md

Install libs:

sudo apt-get install python3-rpi.gpio

Then run:

python3 test_gpio_output.py
python3 test_gpio_input.py
``

test_gpio_input.py

import RPi.GPIO as GPIO
import time

# Set up GPIO using BCM numbering
GPIO.setmode(GPIO.BCM)

# List of GPIO pins to monitor
pins = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27]

# Set up all pins as inputs
for pin in pins:
    GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)  # Use pull-down resistors to avoid floating pins

# Dictionary to store the last state of each pin
last_states = {pin: GPIO.input(pin) for pin in pins}

print("Monitoring GPIO pins for changes. Press Ctrl+C to exit.\n")

try:
    while True:
        for pin in pins:
            current_state = GPIO.input(pin)
            # Check if the state has changed
            if current_state != last_states[pin]:
                state_str = "HIGH" if current_state == GPIO.HIGH else "LOW"
                print(f"GPIO {pin} changed to {state_str}")
                # Update the last state of the pin
                last_states[pin] = current_state
        time.sleep(0.1)  # Small delay to avoid overwhelming CPU
except KeyboardInterrupt:
    print("\nStopped monitoring.")

finally:
    GPIO.cleanup()
    print("GPIO pins reset to default state.")

test_gpio_output.py

import RPi.GPIO as GPIO

# Set up GPIO using BCM numbering
GPIO.setmode(GPIO.BCM)

# List of GPIO pins to test
pins = [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27]

# Set up all pins as output, but don't set them HIGH yet
for pin in pins:
    GPIO.setup(pin, GPIO.OUT)

try:
    # Loop through each pin, setting it to HIGH, waiting for a key press, then setting it to LOW
    for pin in pins:
        print(f"Setting GPIO {pin} HIGH")
        GPIO.output(pin, GPIO.HIGH)  # Set current pin to HIGH

        input(f"GPIO {pin} is HIGH. Press Enter to reset...")  # Wait for user to press Enter

        GPIO.output(pin, GPIO.LOW)  # Set current pin to LOW
        print(f"GPIO {pin} reset to LOW.\n")

    print("Test completed for all pins.")

finally:
    # Clean up the GPIO states and release resources
    GPIO.cleanup()
    print("GPIO pins reset to default state.")