{"title": "Meshtastic — Off-Grid Mesh Networking with ESP32 and LoRa", "description": "How Meshtastic turns cheap ESP32+LoRa boards into a fully decentralised text and sensor mesh — no gateways, no subscriptions, no internet required. Flood routing internals, hardware guide (T-Beam, T-Echo, Heltec), real use cases (hiking, disasters, SAR), honest limitations, MQTT bridging, and where this technology is headed.", "topic": "Meshtastic ESP32 LoRa mesh network IoT", "date": "2026-03-20", "voice_map": {"HOST_A": "en-US-EmmaNeural", "HOST_B": "en-GB-RyanNeural"}}