references

• https://www.circuitschools.com/interfacing-16x2-lcd-module-with-raspberry-pi-pico-with-and-without-i2c/
• Interrupts ref
  Pin.irq(handler=None, trigger=Pin.IRQ_FALLING | Pin.IRQ_RISING, *, priority=1, wake=None, hard=False)

SW3 = Pin(("GPIO_0", 4), Pin.IN)
SW3.irq(lambda t: print("SW3 changed"))

• Using flash memory as non-volatile storage on the Pi Pico microcontroller
• https://pypi.org/project/littlefs-python/
• buzzer reference