2 layers100 × 66.1 mm

PicoWiFiModem
mecparts/PicoWiFiModem
A Pico W based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators
39 parts64GPL-3.0
Boards in 2 GitHub repositories, designed in KiCad, that use the TLPR5600 by Vishay Intertechnology (-40℃~+100℃ 10mA 160° 2V 3.5mcd 4.5mm Side View Lens 60mW 630nm 640nm Discrete Diode Red 插件,L=4.5mm LED Indication - Discrete ROHS). See how each wires it, with its parts, size, README and files; the TLPR5600’s symbol, footprint and pinout are on its own page.

mecparts/PicoWiFiModem
A Pico W based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators

punkfab/pcb-corpus
235 real KiCad boards from open-source hardware repositories, prepared as a placement and routing benchmark