The Open Source Internet Is Here

Technological Concepts & System Goals

• Open, permissionless networking over the air: The project argues for escaping legacy telecom “gatekeepers” by building internet connectivity that users own and can modify.
• Reticulum as the core network layer: Uses Reticulum, described as transport-agnostic (works over LoRa, Wi‑Fi/Ethernet, the internet, and custom HF links) and permissionless/open-source.
• Ham radio + APRS/digital modes:
  • Contrasts voice vs digital data on amateur radio.
  • Uses APRS as an example of digital packet radio.
  • Notes APRS’s common VHF use is typically too local for long-distance “skywave” experiments.
• Primary long-range mechanism: HF skywave propagation: Uses HF (in the US amateur context, around 28–28.3 MHz) where radio waves reflect off the ionosphere and can travel hundreds to thousands of miles (“skywave”).
• Legality constraints drive architecture: Sending digital data on HF amateur bands requires a license and must follow amateur rules.

Product/Features & Experiments Described

Airmemes Light 2 (open-source SDR radio)

• Software-defined radio covering 0 to 38.44 MHz, including HF.
• Intended for computer-driven transmission of precise digital frames, not just analog voice.
• Note from the speaker: the hardware was available, but initially the speaker could only receive legally.

Antenna engineering & tuning

• Uses an antenna suited to 28 MHz:
  • Falcon dipole for HF work
  • Later a 10 m mobile whip for in-car testing
• NanoVNA used for tuning effectiveness, checking SWR and observing center-frequency dips.
• Emphasizes that coax/grounding and feedline-core isolation can shift tuning behavior.

RTL-SDR for listening

• A $37 RTL-SDR serves as the receiver for bridge tests.
• Listening does not require a license, enabling receive-only testing and decoder development.

Gateway/bridge concept (to stay legal while using Reticulum)

• Reticulum frames are not transmitted natively over HF (that would be illegal).
• Instead, the system uses “bridge extensions”:
  • If an HF gateway is needed, the bridge repackages messages into an amateur-radio-compliant HF frame.
  • Receivers decode those HF frames and convert them back into Reticulum/LXMF messages.
• The architecture includes:
  • Ingress: HF heard → ingested into Reticulum
  • Egress: Reticulum → encoded into a legal HF frame → transmitted

Legal/Privacy Restrictions & How the Design Responds

• No encryption/obscuring meaning requirement: Amateur rules (as interpreted in the video) forbid obscuring communication meaning, including encryption.
• Conflict with Reticulum encryption: Reticulum’s encryption is presented as fundamental (framed as “encryption is gravity”).
• Workaround via gateway termination:
  • The proposed approach ensures encryption isn’t transparently carried over HF.
  • The gateway terminates encryption by:
    • receiving a Reticulum message,
    • converting it into a compliant HF frame,
    • forwarding it over HF in a way that’s open/readable.
• Trade-off: the long-haul HF segment becomes transparent in the legal sense.

Build/Process & Tutorials Referenced (Practical Guidance)

Learning resources for ham radio

• Ham Radio Crash Course
• Ham Radio 2.0

License path

• The speaker studies and then takes an amateur radio exam at Unified Radio Group (“The Farm” in Miami).
• After receiving an FCC welcome message, they obtain an official call sign.

Codec documentation / public decode process

• The video mentions publishing a public “HF codec” decode recipe (on GitHub/Cross Talk docs) so recorded messages can be decoded while meeting “public meaning” constraints.

Reticulum integration via Cross Talk

• Uses Cross Talk (a mesh chat fork made by the speaker) plus custom bridge extension modules for HF/RTL SDR parallel operation.

Key Results & “Miracles” Claimed (Evaluation)

1. Miracle #1: Long-distance receiving proof (receive-only legality)

• FT8 decoding received from Bogotá, Colombia (~1600 miles).
• Also found a far AM broadcast (example: WWCR from Nashville ~727 miles), showing effective reception.

2. Miracle #2: End-to-end bridging proof inside the office/test environment

• Demonstrated an end-to-end Reticulum message sent from a node that could not directly reach another node, using:
  • a licensed gateway for HF transmission,
  • an RTL-SDR listener + decoder,
  • conversion to/from Reticulum/LXMF.
• Reported ~7 seconds to complete the end-to-end transmission in that test.

3. Field testing progress (shorter-range practical validation)

• Mobile receiver tests achieved beyond line-of-sight reception.
• Examples:
  • testing at ~2 miles with neighborhoods in between
• Ongoing tuning/troubleshooting focus:
  • antenna tuning
  • ground plane issues
  • power stability
  • decoder compute time

Debugging / Performance Engineering Described

Power supply instability issues

• Transmission failed above a threshold.
• Fix involved swapping power supplies and discovering that current/power delivery limited successful transmission power.

Decoder performance optimization

• Decoder was initially too slow under real field conditions.
• Optimized by porting compute-heavy Python decoding to Rust (inspired by PRNS / high-performance Reticulum work).
• Added a custom Raspberry Pi app featuring:
  • remote control of transmitter parameters,
  • real-time decoder success/fidelity/SNR readouts,
  • remote integration using MeshVPN-like mechanisms and Tailscale.

What Wasn’t Completed (Limitations)

• The intended live skywave test (hundreds/thousands of miles) across two independent people in different locations was not achieved within the production window.
• Constraints included:
  • weather/band openness (“band closed/reopened”),
  • logistics
• Final “proof at distance” remained pending.

Main Speakers / Sources

• Main speaker: The project creator/host (implied by first-person narrative; building Reticulum HF bridging using Airmemes Light 2, Cross Talk, and RTL-SDR).

• Referenced creators/organizations:

  • Mark (creator of Reticulum; “encryption is gravity”)
  • Ham Radio Crash Course (YouTube)
  • Ham Radio 2.0 (YouTube)
  • Unified Radio Group (Miami) (“The Farm” exam/event site)
  • Meshtastic and Meshcore (community network examples)
  • Starlink, Aridium, APRS, FT8
  • PRNS / Rust Reticulum implementation (performance inspiration)