cell_loader_ctrl/playgrounds/gpio_playground.py

import asyncio
import pigpio

async def toggle_pin(pin: int, shared_state):
    """Toggle a GPIO pin based on shared state."""
    pi = pigpio.pi()
    if not pi.connected:
        raise RuntimeError(f"Failed to connect to pigpio daemon for pin {pin}")
    
    try:
        while True:
            pi.write(pin, shared_state['state'])
            await asyncio.sleep(0.1)  # Small delay to prevent CPU overuse
    finally:
        pi.write(pin, 0)
        pi.stop()

async def handle_input(shared_state):
    """Handle keyboard input to toggle pins."""
    while True:
        await asyncio.get_event_loop().run_in_executor(None, input, "Press Enter to toggle pins...")
        shared_state['state'] = 1 - shared_state['state']  # Toggle state
        print(f"Toggled pins to: {'ON' if shared_state['state'] else 'OFF'}")

async def main():
    """Run input handling and pin toggling in parallel."""
    shared_state = {'state': 0}
    pins = [27]
    # pins = [17, 27, 22]
    pin_tasks = [toggle_pin(pin, shared_state) for pin in pins]
    
    await asyncio.gather(handle_input(shared_state), *pin_tasks)

if __name__ == "__main__":
    try:
        asyncio.run(main())
    except KeyboardInterrupt:
        print("Exiting...")