“Built my Sofle with this MCU. Works brilliantly, though you may need to create your own firmware to suit the KB2040 board specifically, as the generic uf2 files I could find had no response from this board. Making working firmware is really simple using the QMK tutorials.”
“Good that it has USB-C, boot and reset buttons and can sit flat on a PCB with edge soldering or use pins on a breadboard or socket. But I wish Adafruit had made the board longer and brought out all the RP2040 GPIO pins. For keyboards, you need all the GPIO you can get. This board has 18 brought out so would support up to 81 keys in a 9x9 matrix. The original Pi Pico (and the RP2040 chip) has 25, so could support 12x13 or 156 keys.”
