KiCad boards from 2 GitHub repositories tagged “yocto”, the most starred first; open any of them in PCBKit.
TheYoctoJester/dutler
A bench butler for your Device Under Test: turns a Raspberry Pi Pico into a USB-serial console bridge with power-relay and MOSFET strap/reset control for embedded-Linux bring-up and hardware-in-the-loop.
Kampi/IoT-Gateway
Open-Source Zigbee, Thread, wM-Bus, LoRa, LoRaWAN gateway for Home Assistant.
TheYoctoJester/dutler
A bench butler for your Device Under Test: turns a Raspberry Pi Pico into a USB-serial console bridge with power-relay and MOSFET strap/reset control for embedded-Linux bring-up and hardware-in-the-loop.