Raspberry Pi Pico's built-in bootloader allows you to write firmware via USB or SWD. However, in some situations, other interfaces may be useful. Picoboot3 now offers the options of UART, I2C and SPI.

Lately, I, a maximalist, have been yearning to be a minimalist. I am not alone. “People are stuck in their houses and sick of their stuff,” Randy Sabin, who runs estate and Internet sales, told me ...