Tech Blog

Notes and latest updates.

Browser-First, Offline Data Services Demo

2026-01-11

A single-node, offline network that boots from SD, exposes a captive portal, and serves real-time chat and maps to stock smartphones—no apps, no Internet.

Stable Battery Power for Single-Board Computers

2025-11-15

A practical, referenced guide to running SBCs reliably from power banks, with Raspberry Pi and Anker 737 examples.

Genuinely Autonomous Systems: Local Mesh Networks for Disaster Procurement

2025-10-12

Procurement still privileges centralized, carrier-managed networks even though unlicensed, community-operated meshes can preserve local services under isolation. Drawing on Japan's experience—2011 Tōhoku, ARIB STD-T108, Wi-Fi HaLow pilots—this essay sets out the evidence base and proposes procurement tests that value local continuity.

Field-Ready Emergency Ad-Hoc Networks for Real-World Deployments

2025-10-11

Two decades of 'infrastructure-less' research delivered elegant routing but poor usability. This article explains why and proposes a five-axis feasibility lens—App Needed, Proprietary, Browser Access, Self-Deployable, Long Range—centered on a browser-first mesh substrate.

Satellite-to-Phone and HaLow Mesh Resilience Networks

2025-10-09

Local, battery-first sub-GHz meshes keep people connected indoors while satellites bridge islands and remotes.

LoRa with UAVs: extending sub-GHz IoT coverage

2025-10-04

Experiments show UAV-mounted LoRa nodes extend coverage in suburban and urban deployments, with lessons for Wifi HaLow.

Seventeen Minutes to Move — Lessons from Nobeoka's Wifi HaLow field trial

2025-10-01

Independent Japanese field trial shows Wifi HaLow neighborhood voice, periodic imaging, and passive tags can coordinate evacuation under a tight tsunami window.

HaLert — evidence for HaLow data + LoRa control in emergencies

2025-09-27

Independent results indicate Wifi HaLow can carry citizen/telemetry traffic while a LoRa control mesh keeps operations responsive.

Operating Systems for TAK Server on Raspberry Pi Deployments

2025-09-21

Evaluating OS options and radio support for LoRa and Wifi HaLow on Raspberry Pi hardware.

Long-Range Wifi with 802.11n

2025-09-20

802.11n promised high throughput, but what happens when you stretch it for distance?

Citizen-operated MANET with Wifi HaLow

2025-09-05

A practical, off-grid IP mesh built from open source and commodity radios.