HERMES is an open-source software stack that functions as a data pipeline over high-frequency radio, capable of transmitting photos, emails, voice memos, and other files.

Beyond voice, HERMES enables secure data transmission on shortwave radios by supporting various file types as part of its HF data transmission system.

The project aims to improve emergency communications, enable inventory and data sharing (such as manifests and telemedicine), and facilitate evidence transmission in remote areas.

Encryption is optional and designed to protect sensitive information in regions with differing regulatory rules, accommodating partners who require data security.

In a real-world pilot, artisanal fishers in Bangladesh used HERMES-enabled GPS and SOS features to support a rescue operation after a mechanical failure at sea.

The system leverages the ionosphere as a reflective medium to move data over long distances, achieving 400- to 600-kilometer links with about 20 watts of transmitter power.

Rhizomatica, the nonprofit behind HERMES, operates globally to build and deploy shortwave and cellular-communication infrastructure for off-grid communities.