4 layers83.3 × 88.1 mm

Bottom PCB
StanZalewski/Autonomous-remote-monitoring-system-based-on-the-LoRaWAN-protocol
Solar-powered LoRaWAN weather station — 3 custom PCBs, bare-metal STM32, 4.3 km verified link
124 parts
Boards in 1 GitHub repository, designed in KiCad, that use the SCWN03A-12 by MW (1 12V 250mA 3W 3kV 84% 9V~18V DIP,31.8x20.3mm Power Module/Power Supply ROHS). See how each wires it, with its parts, size, README and files; the SCWN03A-12’s symbol, footprint and pinout are on its own page.

StanZalewski/Autonomous-remote-monitoring-system-based-on-the-LoRaWAN-protocol
Solar-powered LoRaWAN weather station — 3 custom PCBs, bare-metal STM32, 4.3 km verified link