All Notes

Workbench writeups, protocol captures, hardware tests, and field experiments documenting radio frequency systems in the open.

Sep 16, 2026

LoRaUnlicensedGuidesHardware

What LoRa Actually Is: Physical Layer Mechanics, FCC Part 15, and the 1-Watt Trap

A builder's guide to Chirp Spread Spectrum physics, symbol time math, why 125 kHz LoRa cannot use the §15.247 1-Watt digital modulation shortcut, and how Part 15 differs from Part 97.

8 min read

Sep 09, 2026

GuidesUnlicensedProtocolsMeshCore

Welcome to OpenRF Note: An Unlicensed RF & Wireless Notebook

Why OpenRF Note exists: documenting FCC Part 15 unlicensed spectrum, exhaustive channel rosters, protocol packet framing, coexistence maps, and diagnostic RF engineering in the open.

5 min read