Small computing hardware
https://www.st.com/en/microcontrollers-microprocessors/stm32-ultra-low-power-mcus.html
https://www.waveshare.com/wiki/Raspberry_Pi_Pico
https://www.st.com/en/microcontrollers-microprocessors/stm32-ultra-low-power-mcus.html
https://www.waveshare.com/wiki/Raspberry_Pi_Pico