2 layers30.5 × 25.4 mm

SIM39EAU
vul-os/sirboard
Open hardware: 107 KiCad PCB designs — SMD-to-THT breakout adapters, ATTiny/ATMega/ESP development boards, and a 39-part sensor line on a common JST-SH connector.
20 parts56Apache-2.0
Boards in 1 GitHub repository, designed in KiCad, that use the SIM39EA by SIMCom Wireless Solutions. See how each wires it, with its parts, size, README and files; the SIM39EA’s symbol, footprint and pinout are on its own page.

vul-os/sirboard
Open hardware: 107 KiCad PCB designs — SMD-to-THT breakout adapters, ATTiny/ATMega/ESP development boards, and a 39-part sensor line on a common JST-SH connector.