River Level Monitoring Node_LoraWAN

Hello everyone,

I'm developing a battery-powered LoRaWAN river level monitoring node as part of my master's thesis.

I have completed three schematic sheets in Altium Designer, covering the power management system, Murata Type 1SJ module, and USB/debugging interfaces.

Before starting the PCB layout, I would appreciate feedback from experienced hardware engineers, particularly on:

• Power management: TPS63900 buck-boost converter, LM66100 USB/battery power selection, and reverse-polarity protection.
• MCU and LoRaWAN: Murata Type 1SJ power connections, antenna interface, and external components.
• USB and debugging: USB data connections, ESD protection, SWD programming, and UART communication.
• Low-power operation: Possible unnecessary current consumption or missing protection components.

My main concern is identifying electrical design mistakes or reliability issues before PCB manufacturing.

I have attached all three schematic sheets for review.

Thank you for your time and suggestions!