RADIO HUB

Confirmed Reception — known frequencies tuned & measured

Each row is a real tune to a known frequency with the live SNR over the local noise floor. This is ground-truth: if it shows here, the RSP1A is hearing it right now.

Band Activity Map — broadband discovery sweep

Coarse 88–470 MHz sweep, strongest signal per band. Detections include noise — treat max-SNR as the real indicator, not the count.

OpenWebRX — Continuous Waterfall Receiver checking…

Full-spectrum waterfall browser UI with live demodulation. Exclusive with the Snapshot Tuner — only one can hold the RSP1A at a time. When started, the host sdrplay_apiService is stopped and the container takes over the USB device.

ADS-B — Aircraft Tracking (1090 MHz) checking…

Decodes Mode S / ADS-B from aircraft transponders and plots them on a live OpenStreetMap (SDRplay dump1090). Exclusive with the Snapshot Tuner and OpenWebRX — only one can hold the RSP1A at a time. Note: the HF antenna is inefficient at 1090 MHz, so expect high-altitude / nearby traffic only until a dedicated 1090 MHz antenna is fitted.

Live Tuner — Snapshot Listen

Tune the RSP1A to any frequency and capture a short live audio clip + spectrum. RX-only. One capture at a time (single-tuner device).

Reading the Data — Caveats

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JS8 Activity

Decoded Free-text Messages varicode/JSC bodies · newest first

Most Recent Decodes newest first

JS8 Reference & Knowledge Base

NIST WWV / WWVH — Standard Time & Frequency

WWV (Fort Collins, CO) and WWVH (Kauai, HI) broadcast UTC on 2.5 / 5 / 10 / 15 / 20 / 25 MHz (WWVH omits 20 & 25). Received AM off a remote KiwiSDR and verified by deterministic DSP — scripts/wwv-decode.py. The station is confirmed by its 1-second tick train (5 ms burst of 1000 Hz WWV / 1200 Hz WWVH at the top of every second, phase-folded to a z-score), corroborated by the 1000/1200 Hz spectral line; the 100 Hz subcarrier carries the BCD time code and the 0.8 s minute marker anchors second :00. Which bands decode = a live propagation ground-truth to Colorado (and Hawaii).

Reception Board

Higher bands (15/20/25 MHz) are daytime-propagation; expect them quiet after dark. Re-sampled by the wwv-sweep cron; newest capture per frequency shown.

Build & Install Status

Live from /var/lib/jarvis/data/mercury/build-result.json, written by the mercury-install privileged op — not a hardcoded claim.

PTT Session Readiness

Mercury is a per-session binary — not a persistent service. Status below reflects validated readiness when binary is present. Activate with the commands in the Reference Config cards below.

RNS loopback validated 2026-07-14: KISS frame decoded, 510 B DATAC1, PTT ON/OFF cycle. Loopback config: /var/lib/jarvis/data/reticulum-loopback/ · Full bridge design: plans/mercury-reticulum-bridge.md

ardopcf — Open ARDOP Modem

Open ARDOP (pflarue) — free, native-Linux modem with broader Winlink RMS reach than Mercury; our open fallback (or primary) below VARA HF. Live from /var/lib/jarvis/data/ardopcf/build-result.json (ardopcf-install op). pat TNC on 8515.

Layered HF-Modem Stack — robustness first

Principle (Rob 2026-07-11): be as robust as possible — independent modems, graceful fallback, one pat client switching transports by connect-URL scheme.

Email-reach order: VARA HF (future, Wine — widest RMS) → ardopcf (open, common on RMS) → Mercury (open, Linux-native, emerging RMS) → JS8Call (keyboard, last-ditch).
Fully-open / grid-down order: ardopcf → Mercury → JS8Call. Full matrix + failure-mode analysis: knowledge/radio/tools/hf-modem-comparison.md.

Buildout Roadmap

Plan: plans/mercury-winlink-buildout.md. Build state above is machine-verified; the phase checklist tracks project progress (updated per session).

Related docs

Wiring — low-side switch (2N2222 NPN or 2N7000 MOSFET, identical)

   Nano D11 ──[ 1 kΩ ]──●──────────►  B/G   (Base / Gate — control)
                        │
                     [ 10 kΩ ]  ← pulldown: holds Q OFF while the Nano resets
                        │
   Nano GND ────────────●──────────►  E/S   (Emitter / Source — common)
       │
       └──── common ground ───────►  G90 Sleeve

   G90 Tip + Ring (jumpered) ───────►  C/D   (Collector / Drain — switched)

   Q = ONE transistor.   2N2222 / 2N3904 (NPN):  B/G=Base  C/D=Collector  E/S=Emitter
                         2N7000 (N-MOSFET):       B/G=Gate  C/D=Drain      E/S=Source
   (B/G, C/D, E/S are three SEPARATE pins — never wire them to each other.)

   KEY-DOWN:  D11 HIGH → Q conducts → C/D↔E/S closes → G90 Tip pulled to GND → TX keys
   KEY-UP:    D11 LOW  → Q off       → Tip floats (rig's pull-up)             → no key

Common ground is essential — Nano GND, transistor Emitter/Source, and G90 Sleeve must all meet at one node, or the switch has no return path.

Arduino Nano pinout — D11 (key line) + GND

    Left side                 Right side
  (top → bottom)            (top → bottom)
  ─────────────             ──────────────
    D13 (LED)                 D12
    3V3                    ★  D11 (MOSI) ← KEY LINE to 1 kΩ
    REF                       D10 (SS)
    A0                        D9
    A1                        D8
    A2                        D7
    A3                        D6
    A4                        D5
    A5                        D4
    A6                        D3
    A7                        D2
    5V                     ★  GND ← common ground (transistor E + G90 Sleeve)
    RST                       RST
  ★ GND ← (also GND)          RX0
    VIN                       TX1

  ★ = pins used in this build
  D11 is the 2nd pin from top on the RIGHT side.
  GND is the 12th pin from top on the right, and
       the 14th pin from top on the left.

D11 is the K3NG key line (tx_key_line_1 11). It goes HIGH for the duration of each Morse element and drives the transistor Base through the 1 kΩ resistor.

GND ties to the transistor Emitter and to the G90 Sleeve — all three must share a single node. Use either GND pin (right-side pin 12 is convenient when both D11 and GND are on the right).

Local mirror: Nano pinout PNG (Arduino official) — works offline on LAN.

2N2222 NPN — concrete wiring (TO-92, E-B-C)

Part in hand: TO-92 marked 2N2222 A331 → pinout is E-B-C (flat face toward you, legs down, left→right). This schematic uses those pin names directly — no generic B/G aliases.

  Nano D11 ──[ 1 kΩ ]──●──── Base (B)  ← pin 2 of TO-92 (center leg)
                       │
                    [ 10 kΩ ]  ← pulldown: Base → GND, holds transistor OFF while Nano resets
                       │
  Nano GND ────────────●──── Emitter (E) ← pin 1 of TO-92 (left leg, flat face toward you)
      │
      └──── common GND ──────── G90 KEY jack Sleeve (3.5 mm)

  G90 KEY Tip + Ring (jumpered) ─── Collector (C) ← pin 3 of TO-92 (right leg)

  TO-92 orientation:  ┌─────┐   flat face toward you, pins pointing down
                      │ 2N2222│
                      └─┬─┬─┘
                        E B C   ← left=E, center=B, right=C

  KEY-DOWN: D11 HIGH → B-E forward biased → C-E conducts → G90 Tip pulled to GND → TX keys
  KEY-UP:   D11 LOW  → 10k pulls B to GND → transistor off → Tip floats → no key

  ⚠ Some off-brand TO-92 "2N2222" are ECB, not EBC. Always buzz it out with a meter
    in diode mode first: B→E and B→C both read ~0.6 V forward; reverse both read OL.
    Date code A331 follows P2N2222A spec (EBC) — trust the meter, not the label.

TRS plug: Tip = DIT, Ring = DAH, Sleeve = GND (G90 manual p.9). Tip+Ring are jumpered into one key wire — both connect to Collector (C). Meter the cable conductors before soldering; wire colours are not standardised.

On-air — GATED (D-KEY-4) · do NOT transmit until cleared

G90 config (verify at the rig): set CW key mode = manual / straight key (internal keyer OFF) so it keys 1:1 with our formed Morse. A continuous tone on key-down = the internal iambic keyer is still on — switch it off. Start into a dummy load at low power, confirm output, then antenna.

Build progress

Resources & local mirrors

All local mirrors served from this dashboard — accessible on LAN without internet.