4 layers39.9 × 22.7 mm

BBB
SunDevilRocketry/Bluetooth-Breakout
STM Bluetooth board with chip and antenna based around the STMWBA50
36 parts
Boards in 1 GitHub repository, designed in KiCad, that use the LM393F-GE2 by ROHM Semiconductor (-16V~-1.5V、1.5V~16V -40℃~+85℃ 1mA 1us 2 250nA 36V 3V~32V 4.5mV 400ns 5nA Open Collector TTL SOP-8 Comparators ROHS). See how each wires it, with its parts, size, README and files; the LM393F-GE2’s symbol, footprint and pinout are on its own page.

SunDevilRocketry/Bluetooth-Breakout
STM Bluetooth board with chip and antenna based around the STMWBA50