Hardware
Transceivers, silicon, breakout boards & wiring
Zigbee 3.0 & 802.15.4: 2.4 GHz Mesh Mechanics, Coexistence & Channel 26
A builder's guide to IEEE 802.15.4 and Zigbee 3.0: Coordinator/Router/End Device roles, 2.4 GHz Wi-Fi overlap maps, the Channel 26 FCC restricted band trap, and local ZHA control.
ESP-NOW Under the Hood: Action Frames, MAC Pairing & Sub-5ms Telemetry
A builder's guide to Espressif's connectionless protocol: 802.11 vendor-specific action frames, sub-5ms wake-to-transmit latency, AES-128 CCMP encryption, and channel coexistence.
Reticulum Network Stack: Cryptographic Addressing, Interfaces & Zero-Config
A deep dive into Reticulum Network Stack (RNS): self-sovereign cryptographic addressing, multi-interface transport, RNode LoRa links, LXMF, and Part 15 rules.
MeshCore Protocol: Structured Roles, Companion Topology & Repeaters
How MeshCore approaches sub-1GHz LoRa networking: distinct Companion, Repeater, and Room Server roles, deterministic routing paths, and AES-128 framing.
Meshtastic Off-Grid Messaging: Flood Routing, Airtime Budgets & FCC Limits
How Meshtastic builds peer-to-peer LoRa networks: managed flood routing, next-hop direct messaging, channel crypto, and why network hops are not FCC frequency hops.
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.