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
• esp32 EEPROM read/write cycle stack overflow article \ Summary: \
  • ESP32 doesn’t have an actual EEPROM; instead it uses some of its flash storage to mimic an EEPROM
  • ESP32 flash goes close to 10,000 cycles
  • even automotive grade EEPROM like the 24LC001 which supports at least 1,000,000 writes will only last about 2 months
  • EERAM which supports infinite writes and will not loose contents on power loss (microchip 47C04)
• upy eeprom t24Cxx family driver lib
  • viu for R$2,90
• sd card module
  • R$4 in ali
  • R$30 in mercado livre