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HERMES open-source shortwave radio brings file-level data rates to off-grid deployments

Rhizomatica's HERMES digital HF radio and Mercury modem push shortwave beyond voice, supporting encrypted file transfers for telemedicine and distress signaling 100-200 km offshore.

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TL;DR — three sentences

  • HERMES is an open-source digital shortwave radio from Rhizomatica founder Peter Bloom, operating in the 3 to 30 MHz HF band alongside its Mercury digital modem. [S1]
  • The system runs about 20 watts of transmit power and targets 400 to 600 km ionospheric point-to-point links, compared with conventional HF digital rates that IEEE Spectrum pegs in hundreds of bits per second. [S1]
  • A Bangladesh pilot equipped 10 or 11 artisanal fishing boats, and one 100 to 200 km offshore sent GPS coordinates and an SOS that helped coordinate a rescue. [S1]

Taken from key_takeaways (real field, max 3 entries). Fact and analysis are labelled separately.

HERMES open-source shortwave radio brings file-level data rates to off-grid deployments — Semiconductor News news briefEditorial cover for a Semiconductor News brief. Chip motif; headline "HERMES open-source shortwave radio brings file-level data rates to off-grid deployments". No reported key numbers on this brief, so no number strip is drawn. 1 cited source. Static cover (no animation).SEMICONDUCTOR NEWS · NEWS BRIEFHERMES open-source shortwave radiobrings file-level data rates to off-griddeploymentsXAIPART
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Reported by IEEE Spectrum on 2026-09-21. Summarized and analyzed by XAIPART Editorial.

What happened

Peter Bloom, founder of Philadelphia-based nonprofit Rhizomatica, has open-sourced a digital shortwave radio set called the High-frequency Emergency and Rural Multimedia Exchange System (HERMES), designed to bring file-level data connectivity to remote, indigenous, and off-grid communities.S1

The radio operates in the high-frequency (HF) band from 3 to 30 megahertz, the same band used by Mercury, its companion digital modem.S1 Compared with conventional shortwave digital transmissions that the source pegs in hundreds of bits per second, Bloom told IEEE Spectrum that HERMES uses small radios outputting about 20 watts and can "pretty reliably" establish 400- to 600-kilometer point-to-point links by reflecting signals off the ionosphere.S1

Bloom described HERMES as a software stack that transports arbitrary files - emails, photos, voice memos, GPS coordinates - over HF rather than carrying only voice traffic.S1 He cited a Bangladesh pilot with 10 or 11 artisanal fishing boats in the Bay of Bengal: after the system was installed, one boat 100 to 200 kilometers offshore sent its GPS position and an SOS during a mechanical failure, helping coordinate a rescue.S1

Encryption is built in but optional, because amateur-radio rules vary by country and Bloom said some partners operate in sensitive areas where plain transmissions would put users at risk.S1 Rhizomatica staff deploy HERMES in countries including Bangladesh, Brazil, and Ecuador.S1

Key numbers reported by IEEE Spectrum
MetricReported valueSource
HERMES operating band3 to 30 MHz (HF)[S1]
Transmit powerAbout 20 W[S1]
Typical link distance400 to 600 km between two radios[S1]
Conventional HF digital rateHundreds of bits per second[S1]
Bangladesh pilot boats equipped10 or 11[S1]
Offshore rescue distance100 to 200 km (Bay of Bengal)[S1]

Background timeline

  1. - IEEE Spectrum publishes its interview with Peter Bloom describing HERMES, the Mercury modem, the 20 W power level, and the Bangladesh pilot deployment.[S1]
  2. - The interview appears in the print issue of IEEE Spectrum under the title "Peter Bloom."[S1]

XAIPART take

Technical impact

XAIPART analysis. HERMES and Mercury together turn HF from an essentially analog medium into a file-transfer pipe, which matters for designers who previously had to treat shortwave as voice-only. Engineers evaluating it for remote telemetry, environmental monitoring, or backup SCADA links should focus on the open-source software stack, the 3 to 30 MHz coverage, and the ~20 W power envelope as the design boundaries rather than the headline "long-range" claim.

XAIPART analysis. Because the modem is open source, BOM-level integration is feasible for small teams, but designers should plan for ionospheric variability, antenna selection, and link-budget margins that differ sharply from a 20 W VHF/UHF or cellular module. The 400 to 600 km link range applies to ionospheric skip paths, not line-of-sight deployments.

Market impact

XAIPART analysis. For procurement teams serving NGOs, disaster-response, maritime, and remote-industry customers, HERMES changes the sourcing question from "which HF voice transceiver?" to "which open-source HF data stack and supporting RF front end?" That expands the bill of materials beyond traditional radio suppliers into software-defined radio vendors and antenna/passive-component lines.

XAIPART analysis. Lead-time impact is indirect: HERMES itself is open-source code, but the underlying 20 W HF transceivers, HF-band filters, and ionospheric-aware antenna systems are typically specialty items with longer lead times than mainstream cellular modules. Buyers should expect to qualify multiple RF-component sources rather than treat HF data as a catalog part.

Action

XAIPART analysis. Component buyers supporting NGO or maritime customers should shortlist 20 W-class HF transceivers, broadband HF antennas, and SDR platforms compatible with the Mercury modem, and confirm local amateur-radio encryption rules before specifying encrypted builds. Design engineers should prototype HERMES on standard SDR hardware, characterize real-world throughput versus the "hundreds of bits per second" baseline cited by the source, and document ionospheric worst-case latency for any safety-critical use case.

XAIPART Forecast

XAIPART analysis. XAIPART expects that, within 9 months of this brief (by 2027-07-11), at least one published third-party measurement of the Mercury modem over HERMES-class HF links will report sustained throughput above 1 kilobit per second in field conditions; if no such measurement is published by 2027-07-11, this forecast is wrong. The threshold is traceable to the source's claim that conventional HF digital rates sit in hundreds of bits per second, so "above 1 kbps" represents a meaningful step-change rather than a marginal improvement. XAIPART analysis

Facts are as reported by IEEE Spectrum. The design-in, sourcing, and forward-looking statements above are XAIPART's analysis, not the source's claims. Uncertainty: the source provides no measured throughput figure for HERMES/Mercury in bits per second, no published BOM or transceiver part numbers, and no shipment or user counts beyond the 10 or 11 Bangladesh pilot boats; encryption-capable deployments depend on jurisdiction-specific amateur-radio rules that the source does not enumerate.

Corrections: none at publication. This brief will be updated with a timestamp if the source corrects its report.

Alternatives and lifecycle

Alternatives on file — catalog scope, not a market ranking
PartRelationLifecycleBasis
— No alternative on file NEEDS DATA — Requires match_type before any predecessor label may appear

“Predecessor” and “alternative” labels come only from a recorded match type, a lifecycle status, or the source text. Where no match is recorded, no label is shown. Our own listings are not a market reference.

What to watch

Falsifiable forecast — threshold, window and current status. Disproved forecasts stay visible.
ClaimThresholdByStatus
. XAIPART expects that, within 9 months of this brief (by 2027-07-11), at least one published third-party measurement of the Mercury modem over HERMES-class HF links will report sustained throughput above 1 kilobit pe... no such measurement is published by 2027-07-11 Pending

Forecasts that turn out wrong are kept visible and marked. We do not delete them.

Competitive landscape

  • 21764 live listings in this category on XAIPART
  • 88 manufacturers represented
  • 57 manufacturers mentioned in our news archive over the last 30 days

Counts reflect the XAIPART catalog only — they are not market share.

Affected parts

No catalog match. This story does not map to any part currently listed on XAIPART. We do not infer matches, and we do not show a placeholder list.

Where this sits in the story

Event chain · as of 2026-10-14T13:00:34+08:00 · nodes link to published articles on this site.
Event chain — sit+semiconductor-newsChain nodes: 2026-10-11 Rhizomatica's HERMES digital HF radio and Mercury modem push shortwave beyond voice, supporting encrypted file transfers for telemedicine and distress signaling 100-200 km offshore.; 2026-10-14 Epomaker confirmed a 75% Galaxy keyboard with VIA remapping, aluminium chassis, gasket mount, and Creamy Jade linear switches; pricing is still unconfirmed.. As of 2026-10-14T13:00:34+08:00. Open forecast: Rhizomatica's HERMES digital HF radio and Mercury modem push shortwave b — pending Open forecast: Epomaker confirmed a 75% Galaxy keyboard with VIA remapping, aluminium c — pending.2026-10-11Rhizomatica's HERMour brief ↗this brief2026-10-14Epomaker confirmedour brief ↗Open forecast: Rhizomatica's HERMES digital HF radio and Mercury modem push shortwave b — pendingOpen forecast: Epomaker confirmed a 75% Galaxy keyboard with VIA remapping, aluminium c — pending
  1. hermes-open-source-shortwave-radio-brings-file-level-data-rates-to-off-grid-deployments2026-10-11
  2. epomaker-galaxy75-wireless-keyboard-adds-75-layout-aluminium-case-via-support2026-10-14
  1. Rhizomatica's HERMES digital HF radio and Mercury modem push shortwave beyond voice, supporting encrypted file transfers for telemedicine and distress signaling 100-200 km offshore. trade
  2. Epomaker confirmed a 75% Galaxy keyboard with VIA remapping, aluminium chassis, gasket mount, and Creamy Jade linear switches; pricing is still unconfirmed. trade

The chain is built only from published briefs — a node without a brief is not drawn.

Cost pressure by dimension

Source: FRED · Generated · reference output z and composite are algorithm outputs, not a fetch snapshot

Cost pressure by dimension — composite stateDiverging bars for three dimensions around a zero midpoint. Input Cost has no reading; Supply Demand z -1.4711, notable; Fx Energy z 0.4541, neutral. Composite index -7.6, band neutral.0Input costno readingSupply/demandz −1.4711 · notable46 dFX & energyz +0.4541 · neutral6 dcomposite −7.6 · neutral−100 · −40 · −15 · 0 · +15 · +40 · +100
Underlying values — copyable for verification.
DimensionFRED series IDUnitLagAs of
Input costPCOPPUSDM, PALUMUSDM, PNICKUSDMUSD/mt96 d
Supply/demandPCU334413334413, IPG3344Sindex(1982=100) / index(2017=100)46 d
FX & energyDEXCHUS, DCOILBRENTEU, DHHNGSPrate / USD/bbl / USD/MMBtu6 d

No free authoritative interface for: gold · silver · rare earth · polysilicon · lithium carbonate · market share — listed rather than approximated.

How this was produced

Process evidence — fetch, source sanity, model and gate
Audit trail for this brief
Source fetched IEEE Spectrum · spectrum.ieee.org · 4,966 chars · fetch status success
Source sanity (S1) ok — passed before any model call (no s1_ block recorded)
Model / prompt MiniMax-M3 · prompt Blog Agent - News Summary (v2.8-final) · 7,251 tokens · 26.3s · run completed
Gate verdict pass · 6/6 applicable checks passed · spec v2.9 · C10 ratio 0.03482 · C10 rounds 0
Time contract 2 <time datetime> values in this brief — 0 violations (+08:00 or date-only)

Every row above is produced by the pipeline, not written by hand.

Editorial score

Deterministic gate result — pure PHP, no model involvement in the verdict
Gate score breakdown 6 applicable checks, 6 passed: 100 percent. No hold items or mandatory failures. Gate spec: v2.9 (S0 + S1 + C1–C20) · Source affinity (C20): 0.6587. Applicable checks passed 6 / 6 = 100% · verdict: pass No hold items or mandatory failures Gate spec: v2.9 (S0 + S1 + C1–C20) · Source affinity (C20): 0.6587 The gate decides publication. The independent audit score is advisory only.

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Sources

  1. This Digital Radio Gets Messages to the World's Remotest Locations — https://spectrum.ieee.org/hermes-shortwave-radio-digital-data · rss · accessed

Facts are marked S1/S2 and trace to the linked source. Passages labelled analysis are XAIPART's own reasoning, kept separate from reported facts. Source links are followed rather than nofollow — attribution is intentional.