From 19d6d2e50b249630bc057cf6f804fbc338e243d5 Mon Sep 17 00:00:00 2001
From: Stan Grams <sjg@haxx.space>
Date: Sun, 8 Mar 2026 20:17:37 +0100
Subject: [PATCH] [feat](trx-rs): add HF APRS decoder (300 baud, 1600/1800 Hz
 AFSK)

Adds a second APRS demodulator path tuned for the HF APRS standard
(300 baud Bell 103-style AFSK, mark=1600 Hz / space=1800 Hz), active
on RigMode::DIG.  Shares AX.25 framing, APRS parsing, APRS-IS uplink,
and frontend display with the existing VHF stack.

- trx-aprs: parameterise Demodulator::new(); add AprsDecoder::new_hf()
- trx-core: HfAprs variant in DecodedMessage; hf_aprs_decode_enabled /
  hf_aprs_decode_reset_seq in RigState/RigSnapshot; SetHfAprsDecodeEnabled
  and ResetHfAprsDecoder commands; handlers.rs fallback arm updated
- trx-protocol: client command variants + bidirectional mapping; test
  fixture updated
- trx-server: run_hf_aprs_decoder() task (activates on DIG mode);
  hf_aprs history in DecoderHistories; rig_task command dispatch;
  aprsfi uplink forwards HfAprs via OR-pattern
- trx-frontend: hf_aprs_history in FrontendRuntimeContext
- trx-frontend-http: prune/record/snapshot/clear helpers; SSE history
  replay; toggle_hf_aprs_decode + clear_hf_aprs_decode endpoints;
  /hf-aprs.js endpoint; HF APRS tab in web UI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
---
 src/decoders/trx-aprs/src/lib.rs              |  26 +-
 src/trx-client/trx-frontend/src/lib.rs        |   3 +
 .../trx-frontend-http/assets/web/app.js       |   1 +
 .../trx-frontend-http/assets/web/index.html   |  39 ++
 .../assets/web/plugins/hf-aprs.js             | 409 ++++++++++++++++++
 .../trx-frontend/trx-frontend-http/src/api.rs |  37 ++
 .../trx-frontend-http/src/audio.rs            |  39 ++
 .../trx-frontend-http/src/status.rs           |   1 +
 src/trx-core/src/decode.rs                    |   2 +
 src/trx-core/src/rig/command.rs               |   2 +
 src/trx-core/src/rig/controller/handlers.rs   |   2 +
 src/trx-core/src/rig/state.rs                 |  11 +
 src/trx-protocol/src/codec.rs                 |   1 +
 src/trx-protocol/src/mapping.rs               |   8 +
 src/trx-protocol/src/types.rs                 |   2 +
 src/trx-server/src/aprsfi.rs                  |   2 +-
 src/trx-server/src/audio.rs                   | 139 +++++-
 src/trx-server/src/main.rs                    |  16 +
 src/trx-server/src/rig_task.rs                |  11 +
 19 files changed, 740 insertions(+), 11 deletions(-)
 create mode 100644 src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/hf-aprs.js

diff --git a/src/decoders/trx-aprs/src/lib.rs b/src/decoders/trx-aprs/src/lib.rs
index 03f7003..9c46ddc 100644
--- a/src/decoders/trx-aprs/src/lib.rs
+++ b/src/decoders/trx-aprs/src/lib.rs
@@ -44,9 +44,6 @@ fn crc16ccitt(bytes: &[u8]) -> u16 {
 // Correlation demodulator (one instance)
 // ---------------------------------------------------------------------------
 
-const BAUD: f32 = 1200.0;
-const MARK: f32 = 1200.0;
-const SPACE: f32 = 2200.0;
 const TWO_PI: f32 = std::f32::consts::TAU;
 const PLL_GAIN: f32 = 0.4;
 
@@ -98,9 +95,9 @@ struct RawFrame {
 }
 
 impl Demodulator {
-    fn new(sample_rate: u32, window_factor: f32) -> Self {
+    fn new(sample_rate: u32, baud: f32, mark_hz: f32, space_hz: f32, window_factor: f32) -> Self {
         let sr = sample_rate as f32;
-        let samples_per_bit = sr / BAUD;
+        let samples_per_bit = sr / baud;
         let corr_len = (samples_per_bit * window_factor).round().max(2.0) as usize;
         let energy_window = (sr * 0.05).round() as usize;
 
@@ -111,8 +108,8 @@ impl Demodulator {
             energy_window,
             mark_phase: 0.0,
             space_phase: 0.0,
-            mark_phase_inc: TWO_PI * MARK / sr,
-            space_phase_inc: TWO_PI * SPACE / sr,
+            mark_phase_inc: TWO_PI * mark_hz / sr,
+            space_phase_inc: TWO_PI * space_hz / sr,
             corr_len,
             mark_i_buf: vec![0.0; corr_len],
             mark_q_buf: vec![0.0; corr_len],
@@ -541,11 +538,22 @@ pub struct AprsDecoder {
 }
 
 impl AprsDecoder {
+    /// VHF APRS: Bell 202, 1200 baud, mark=1200 Hz, space=2200 Hz.
     pub fn new(sample_rate: u32) -> Self {
         Self {
             demodulators: vec![
-                Demodulator::new(sample_rate, 1.0),
-                Demodulator::new(sample_rate, 0.5),
+                Demodulator::new(sample_rate, 1200.0, 1200.0, 2200.0, 1.0),
+                Demodulator::new(sample_rate, 1200.0, 1200.0, 2200.0, 0.5),
+            ],
+        }
+    }
+
+    /// HF APRS: 300 baud, mark=1600 Hz, space=1800 Hz (200 Hz shift).
+    pub fn new_hf(sample_rate: u32) -> Self {
+        Self {
+            demodulators: vec![
+                Demodulator::new(sample_rate, 300.0, 1600.0, 1800.0, 1.0),
+                Demodulator::new(sample_rate, 300.0, 1600.0, 1800.0, 0.5),
             ],
         }
     }
diff --git a/src/trx-client/trx-frontend/src/lib.rs b/src/trx-client/trx-frontend/src/lib.rs
index d5a8cde..f796dc5 100644
--- a/src/trx-client/trx-frontend/src/lib.rs
+++ b/src/trx-client/trx-frontend/src/lib.rs
@@ -144,6 +144,8 @@ pub struct FrontendRuntimeContext {
     pub vdes_history: Arc<Mutex<VecDeque<(Instant, VdesMessage)>>>,
     /// APRS decode history (timestamp, packet)
     pub aprs_history: Arc<Mutex<VecDeque<(Instant, AprsPacket)>>>,
+    /// HF APRS decode history (timestamp, packet)
+    pub hf_aprs_history: Arc<Mutex<VecDeque<(Instant, AprsPacket)>>>,
     /// CW decode history (timestamp, event)
     pub cw_history: Arc<Mutex<VecDeque<(Instant, CwEvent)>>>,
     /// FT8 decode history (timestamp, message)
@@ -207,6 +209,7 @@ impl FrontendRuntimeContext {
             ais_history: Arc::new(Mutex::new(VecDeque::new())),
             vdes_history: Arc::new(Mutex::new(VecDeque::new())),
             aprs_history: Arc::new(Mutex::new(VecDeque::new())),
+            hf_aprs_history: Arc::new(Mutex::new(VecDeque::new())),
             cw_history: Arc::new(Mutex::new(VecDeque::new())),
             ft8_history: Arc::new(Mutex::new(VecDeque::new())),
             wspr_history: Arc::new(Mutex::new(VecDeque::new())),
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
index 5ddf03a..b421d20 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
@@ -5986,6 +5986,7 @@ function dispatchDecodeMessage(msg) {
   if (msg.type === "ais" && window.onServerAis) window.onServerAis(msg);
   if (msg.type === "vdes" && window.onServerVdes) window.onServerVdes(msg);
   if (msg.type === "aprs" && window.onServerAprs) window.onServerAprs(msg);
+  if (msg.type === "hf_aprs" && window.onServerHfAprs) window.onServerHfAprs(msg);
   if (msg.type === "cw" && window.onServerCw) window.onServerCw(msg);
   if (msg.type === "ft8" && window.onServerFt8) window.onServerFt8(msg);
   if (msg.type === "wspr" && window.onServerWspr) window.onServerWspr(msg);
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
index 6eb6b16..b979e9c 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
@@ -85,6 +85,7 @@
         <div id="vdes-bar-overlay" aria-live="polite" aria-label="Recent VDES bursts"></div>
         <div id="ft8-bar-overlay" aria-live="polite" aria-label="Recent FT8 decodes"></div>
         <div id="aprs-bar-overlay" aria-live="polite" aria-label="Recent APRS frames"></div>
+        <div id="hf-aprs-bar-overlay" aria-live="polite" aria-label="Recent HF APRS frames"></div>
         <div id="cw-bar-overlay" aria-live="polite" aria-label="Recent CW decodes"></div>
       </div>
       <div id="spectrum-panel" style="display:none;">
@@ -373,6 +374,7 @@
         <button class="sub-tab" data-subtab="ais">AIS</button>
         <button class="sub-tab" data-subtab="vdes">VDES</button>
         <button class="sub-tab" data-subtab="aprs">APRS</button>
+        <button class="sub-tab" data-subtab="hf-aprs">HF APRS</button>
         <button class="sub-tab" data-subtab="cw">CW</button>
         <button class="sub-tab" data-subtab="ft8">FT8</button>
         <button class="sub-tab" data-subtab="wspr">WSPR</button>
@@ -529,6 +531,42 @@
         </div>
         <div id="aprs-packets"></div>
       </div>
+      <div id="subtab-hf-aprs" class="sub-tab-panel" style="display:none;">
+        <div class="ft8-controls aprs-controls">
+          <button id="hf-aprs-pause-btn" type="button">Pause</button>
+          <button id="hf-aprs-clear-btn" type="button">Clear</button>
+          <input id="hf-aprs-filter" class="ft8-filter" type="text" placeholder="Filter (e.g. SP2, beacon)" />
+          <small id="hf-aprs-status" style="color:var(--text-muted);">Waiting for server decode</small>
+        </div>
+        <div class="aprs-summary">
+          <div class="aprs-summary-card">
+            <span class="aprs-summary-label">Frames</span>
+            <span id="hf-aprs-total-count" class="aprs-summary-value">0 total</span>
+          </div>
+          <div class="aprs-summary-card">
+            <span class="aprs-summary-label">Visible</span>
+            <span id="hf-aprs-visible-count" class="aprs-summary-value">0 shown</span>
+          </div>
+          <div class="aprs-summary-card">
+            <span class="aprs-summary-label">Latest</span>
+            <span id="hf-aprs-latest-seen" class="aprs-summary-value">No packets yet</span>
+          </div>
+        </div>
+        <div class="aprs-filter-row">
+          <button id="hf-aprs-type-all" class="aprs-chip active" type="button">All</button>
+          <button id="hf-aprs-type-position" class="aprs-chip" type="button">Pos</button>
+          <button id="hf-aprs-type-message" class="aprs-chip" type="button">Msg</button>
+          <button id="hf-aprs-type-weather" class="aprs-chip" type="button">Wx</button>
+          <button id="hf-aprs-type-telemetry" class="aprs-chip" type="button">Tlm</button>
+          <button id="hf-aprs-type-other" class="aprs-chip" type="button">Other</button>
+        </div>
+        <div class="aprs-filter-row">
+          <button id="hf-aprs-only-pos-btn" class="aprs-chip" type="button">Pos Only</button>
+          <button id="hf-aprs-hide-crc-btn" class="aprs-chip" type="button">No CRC</button>
+          <button id="hf-aprs-collapse-dup-btn" class="aprs-chip" type="button">Dupes</button>
+        </div>
+        <div id="hf-aprs-packets"></div>
+      </div>
       <div id="subtab-ft8" class="sub-tab-panel" style="display:none;">
         <div class="ft8-controls">
           <button id="ft8-decode-toggle-btn" type="button">Enable FT8</button>
@@ -640,6 +678,7 @@
   <script src="/ais.js"></script>
   <script src="/vdes.js"></script>
   <script src="/aprs.js"></script>
+  <script src="/hf-aprs.js"></script>
   <script src="/ft8.js"></script>
   <script src="/wspr.js"></script>
   <script src="/cw.js"></script>
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/hf-aprs.js b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/hf-aprs.js
new file mode 100644
index 0000000..5388482
--- /dev/null
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/plugins/hf-aprs.js
@@ -0,0 +1,409 @@
+// --- HF APRS Decoder Plugin (server-side decode, 300 baud) ---
+const hfAprsStatus = document.getElementById("hf-aprs-status");
+const hfAprsPacketsEl = document.getElementById("hf-aprs-packets");
+const hfAprsFilterInput = document.getElementById("hf-aprs-filter");
+const hfAprsPauseBtn = document.getElementById("hf-aprs-pause-btn");
+const hfAprsOnlyPosBtn = document.getElementById("hf-aprs-only-pos-btn");
+const hfAprsHideCrcBtn = document.getElementById("hf-aprs-hide-crc-btn");
+const hfAprsCollapseDupBtn = document.getElementById("hf-aprs-collapse-dup-btn");
+const hfAprsTotalCountEl = document.getElementById("hf-aprs-total-count");
+const hfAprsVisibleCountEl = document.getElementById("hf-aprs-visible-count");
+const hfAprsLatestSeenEl = document.getElementById("hf-aprs-latest-seen");
+const HF_APRS_MAX_PACKETS = 100;
+let hfAprsFilterText = "";
+let hfAprsPacketHistory = [];
+let hfAprsPaused = false;
+let hfAprsBufferedWhilePaused = 0;
+let hfAprsOnlyPos = false;
+let hfAprsHideCrc = false;
+let hfAprsCollapseDup = false;
+let hfAprsTypeFilter = "all";
+
+function hfAprsPacketCategory(pkt) {
+  const type = String(pkt.type || "").toLowerCase();
+  const info = String(pkt.info || "").toLowerCase();
+  if (pkt.lat != null && pkt.lon != null || type.includes("position")) return "position";
+  if (type.includes("message") || info.startsWith(":")) return "message";
+  if (type.includes("weather") || info.startsWith("_")) return "weather";
+  if (type.includes("telemetry") || info.startsWith("t#")) return "telemetry";
+  return "other";
+}
+
+function hfAprsCategoryLabel(category) {
+  switch (category) {
+    case "position": return "Position";
+    case "message": return "Message";
+    case "weather": return "Weather";
+    case "telemetry": return "Telemetry";
+    default: return "Other";
+  }
+}
+
+function hfAprsAgeText(tsMs) {
+  if (!Number.isFinite(tsMs)) return "just now";
+  const deltaMs = Math.max(0, Date.now() - tsMs);
+  const seconds = Math.round(deltaMs / 1000);
+  if (seconds < 5) return "just now";
+  if (seconds < 60) return `${seconds}s ago`;
+  const minutes = Math.round(seconds / 60);
+  if (minutes < 60) return `${minutes}m ago`;
+  const hours = Math.round(minutes / 60);
+  return `${hours}h ago`;
+}
+
+function hfAprsDistanceText(pkt) {
+  if (serverLat == null || serverLon == null || pkt.lat == null || pkt.lon == null) return "";
+  const distKm = haversineKm(serverLat, serverLon, pkt.lat, pkt.lon);
+  if (!Number.isFinite(distKm)) return "";
+  if (distKm < 1) return `${Math.round(distKm * 1000)} m from TRX`;
+  return `${distKm.toFixed(1)} km from TRX`;
+}
+
+function hfAprsPacketSignature(pkt) {
+  return [
+    pkt.srcCall || "",
+    pkt.destCall || "",
+    pkt.path || "",
+    pkt.info || "",
+    pkt.type || "",
+    pkt.lat != null ? pkt.lat.toFixed(4) : "",
+    pkt.lon != null ? pkt.lon.toFixed(4) : "",
+  ].join("|");
+}
+
+function hfAprsHexBytes(bytes) {
+  if (!Array.isArray(bytes) || bytes.length === 0) return "--";
+  return bytes.map((b) => Number(b).toString(16).toUpperCase().padStart(2, "0")).join(" ");
+}
+
+function hfAprsFilterMatch(pkt) {
+  if (hfAprsOnlyPos && (pkt.lat == null || pkt.lon == null)) return false;
+  if (hfAprsHideCrc && !pkt.crcOk) return false;
+  if (hfAprsTypeFilter !== "all" && hfAprsPacketCategory(pkt) !== hfAprsTypeFilter) return false;
+  if (!hfAprsFilterText) return true;
+  const haystack = [
+    pkt.srcCall,
+    pkt.destCall,
+    pkt.path,
+    pkt.info,
+    pkt.type,
+    pkt.lat != null ? pkt.lat.toFixed(4) : "",
+    pkt.lon != null ? pkt.lon.toFixed(4) : "",
+    hfAprsPacketCategory(pkt),
+  ]
+    .filter(Boolean)
+    .join(" ")
+    .toUpperCase();
+  return haystack.includes(hfAprsFilterText);
+}
+
+function hfAprsVisiblePackets() {
+  const packets = hfAprsCollapseDup ? collapseHfAprsDuplicates(hfAprsPacketHistory) : hfAprsPacketHistory;
+  return packets.filter(hfAprsFilterMatch);
+}
+
+function collapseHfAprsDuplicates(packets) {
+  const seen = new Set();
+  const out = [];
+  for (const pkt of packets) {
+    const key = hfAprsPacketSignature(pkt);
+    if (seen.has(key)) continue;
+    seen.add(key);
+    out.push(pkt);
+  }
+  return out;
+}
+
+function updateHfAprsSummary() {
+  const visible = hfAprsVisiblePackets();
+  if (hfAprsTotalCountEl) {
+    hfAprsTotalCountEl.textContent = `${hfAprsPacketHistory.length} total`;
+  }
+  if (hfAprsVisibleCountEl) {
+    let text = `${visible.length} shown`;
+    if (hfAprsPaused && hfAprsBufferedWhilePaused > 0) {
+      text += ` · ${hfAprsBufferedWhilePaused} buffered`;
+    }
+    hfAprsVisibleCountEl.textContent = text;
+  }
+  if (hfAprsLatestSeenEl) {
+    const latest = hfAprsPacketHistory[0];
+    if (!latest) {
+      hfAprsLatestSeenEl.textContent = "No packets yet";
+    } else {
+      hfAprsLatestSeenEl.textContent = `${latest.srcCall} ${hfAprsAgeText(latest._tsMs)}`;
+    }
+  }
+}
+
+function updateHfAprsChipState() {
+  document.querySelectorAll("[id^='hf-aprs-type-']").forEach((btn) => {
+    btn.classList.toggle("active", btn.id === `hf-aprs-type-${hfAprsTypeFilter}`);
+  });
+  hfAprsOnlyPosBtn?.classList.toggle("active", hfAprsOnlyPos);
+  hfAprsHideCrcBtn?.classList.toggle("active", hfAprsHideCrc);
+  hfAprsCollapseDupBtn?.classList.toggle("active", hfAprsCollapseDup);
+  if (hfAprsPauseBtn) {
+    hfAprsPauseBtn.textContent = hfAprsPaused ? "Resume" : "Pause";
+    hfAprsPauseBtn.classList.toggle("active", hfAprsPaused);
+  }
+}
+
+function renderHfAprsInfo(pkt) {
+  const bytes = Array.isArray(pkt.info_bytes) ? pkt.info_bytes : null;
+  if (bytes && bytes.length > 0) {
+    let out = "";
+    for (let i = 0; i < bytes.length; i++) {
+      const b = bytes[i];
+      if (b >= 0x20 && b <= 0x7e) {
+        const ch = String.fromCharCode(b);
+        if (ch === "<") out += "&lt;";
+        else if (ch === ">") out += "&gt;";
+        else if (ch === "&") out += "&amp;";
+        else if (ch === '"') out += "&quot;";
+        else out += ch;
+      } else {
+        const hex = b.toString(16).toUpperCase().padStart(2, "0");
+        out += `<span class="aprs-byte">0x${hex}</span>`;
+      }
+    }
+    return out;
+  }
+  const str = pkt.info || "";
+  let out = "";
+  for (let i = 0; i < str.length; i++) {
+    const code = str.charCodeAt(i);
+    if (code >= 0x20 && code <= 0x7e) {
+      const ch = str[i];
+      if (ch === "<") out += "&lt;";
+      else if (ch === ">") out += "&gt;";
+      else if (ch === "&") out += "&amp;";
+      else if (ch === '"') out += "&quot;";
+      else out += ch;
+    } else {
+      const hex = code.toString(16).toUpperCase().padStart(2, "0");
+      out += `<span class="aprs-byte">0x${hex}</span>`;
+    }
+  }
+  return out;
+}
+
+function renderHfAprsRow(pkt, isFresh) {
+  const row = document.createElement("div");
+  row.className = "aprs-packet";
+  if (!pkt.crcOk) row.classList.add("aprs-packet-crc");
+  if (isFresh) row.classList.add("aprs-packet-new");
+
+  const ts = pkt._ts || new Date().toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
+  const age = hfAprsAgeText(pkt._tsMs);
+  const category = hfAprsPacketCategory(pkt);
+  const categoryLabel = hfAprsCategoryLabel(category);
+  const categoryClass = `aprs-badge aprs-badge-type aprs-badge-type-${category}`;
+  const pathBadge = pkt.path ? `<span class="aprs-badge">${escapeMapHtml(pkt.path)}</span>` : "";
+  const crcBadge = pkt.crcOk ? "" : '<span class="aprs-badge aprs-badge-crc">CRC Fail</span>';
+  const hfBadge = '<span class="aprs-badge" style="background:var(--accent-alt,#f59e0b);color:#000">HF</span>';
+  let symbolHtml = "";
+  if (pkt.symbolTable && pkt.symbolCode) {
+    const sheet = pkt.symbolTable === "/" ? 0 : 1;
+    const code = pkt.symbolCode.charCodeAt(0) - 33;
+    const col = code % 16;
+    const row2 = Math.floor(code / 16);
+    const bgX = -(col * 24);
+    const bgY = -(row2 * 24);
+    symbolHtml = `<span class="aprs-symbol" style="background-image:url('https://raw.githubusercontent.com/hessu/aprs-symbols/master/png/aprs-symbols-24-${sheet}.png');background-position:${bgX}px ${bgY}px"></span>`;
+  }
+  const posLink = pkt.lat != null && pkt.lon != null
+    ? `<a class="aprs-pos" href="javascript:void(0)" data-aprs-map="${pkt.lat},${pkt.lon}">${pkt.lat.toFixed(4)}, ${pkt.lon.toFixed(4)}</a>`
+    : "";
+  const distance = hfAprsDistanceText(pkt);
+  const qrzHref = `https://qrzcq.com/call/${encodeURIComponent(pkt.srcCall || "")}`;
+
+  row.innerHTML =
+    `<div class="aprs-row-head">` +
+      `<span class="aprs-time">${ts}</span>` +
+      hfBadge +
+      symbolHtml +
+      `<span class="aprs-call">${escapeMapHtml(pkt.srcCall)}</span>` +
+      `<span>&gt;${escapeMapHtml(pkt.destCall || "")}</span>` +
+      `<span class="${categoryClass}">${escapeMapHtml(categoryLabel)}</span>` +
+      pathBadge +
+      crcBadge +
+    `</div>` +
+    `<div class="aprs-row-meta">` +
+      `<span class="aprs-meta-text">${escapeMapHtml(age)}</span>` +
+      (distance ? `<span class="aprs-meta-text">${escapeMapHtml(distance)}</span>` : "") +
+      `<span class="aprs-meta-text">${escapeMapHtml(pkt.type || "--")}</span>` +
+    `</div>` +
+    `<div class="aprs-row-detail">` +
+      `<span title="${escapeMapHtml(pkt.type || "")}">${renderHfAprsInfo(pkt)}</span>` +
+      (posLink ? `<span>${posLink}</span>` : "") +
+    `</div>` +
+    `<div class="aprs-row-actions">` +
+      (pkt.lat != null && pkt.lon != null ? `<button class="aprs-inline-btn" type="button" data-aprs-map="${pkt.lat},${pkt.lon}">Map</button>` : "") +
+      (pkt.lat != null && pkt.lon != null ? `<button class="aprs-inline-btn" type="button" data-aprs-copy="${pkt.lat},${pkt.lon}">Copy Coords</button>` : "") +
+      `<a class="aprs-inline-btn" href="${qrzHref}" target="_blank" rel="noopener">QRZ</a>` +
+    `</div>` +
+    `<details class="aprs-details">` +
+      `<summary>Details</summary>` +
+      `<div class="aprs-details-grid">` +
+        `<span class="aprs-detail-label">Source</span><span class="aprs-detail-value">${escapeMapHtml(pkt.srcCall || "--")}</span>` +
+        `<span class="aprs-detail-label">Destination</span><span class="aprs-detail-value">${escapeMapHtml(pkt.destCall || "--")}</span>` +
+        `<span class="aprs-detail-label">Type</span><span class="aprs-detail-value">${escapeMapHtml(pkt.type || "--")}</span>` +
+        `<span class="aprs-detail-label">Path</span><span class="aprs-detail-value">${escapeMapHtml(pkt.path || "--")}</span>` +
+        `<span class="aprs-detail-label">Age</span><span class="aprs-detail-value">${escapeMapHtml(age)}</span>` +
+        `<span class="aprs-detail-label">CRC</span><span class="aprs-detail-value">${pkt.crcOk ? "OK" : "Failed"}</span>` +
+        `<span class="aprs-detail-label">Position</span><span class="aprs-detail-value">${pkt.lat != null && pkt.lon != null ? `${pkt.lat.toFixed(5)}, ${pkt.lon.toFixed(5)}` : "--"}</span>` +
+        `<span class="aprs-detail-label">Info</span><span class="aprs-detail-value">${escapeMapHtml(pkt.info || "--")}</span>` +
+        `<span class="aprs-detail-label">Info Bytes</span><span class="aprs-detail-value">${escapeMapHtml(hfAprsHexBytes(pkt.info_bytes))}</span>` +
+      `</div>` +
+    `</details>`;
+
+  row.querySelectorAll("[data-aprs-map]").forEach((el) => {
+    el.addEventListener("click", (evt) => {
+      evt.preventDefault();
+      const raw = String(el.dataset.aprsMap || "");
+      const [lat, lon] = raw.split(",").map(Number);
+      if (window.navigateToAprsMap && Number.isFinite(lat) && Number.isFinite(lon)) {
+        window.navigateToAprsMap(lat, lon);
+      }
+    });
+  });
+
+  const copyBtn = row.querySelector("[data-aprs-copy]");
+  if (copyBtn) {
+    copyBtn.addEventListener("click", async () => {
+      const raw = String(copyBtn.dataset.aprsCopy || "");
+      try {
+        if (navigator.clipboard?.writeText) {
+          await navigator.clipboard.writeText(raw);
+          showHint("Coordinates copied", 1200);
+        }
+      } catch (_e) {
+        showHint("Copy failed", 1500);
+      }
+    });
+  }
+
+  return row;
+}
+
+function renderHfAprsHistory() {
+  if (!hfAprsPacketsEl || hfAprsPaused) {
+    updateHfAprsSummary();
+    updateHfAprsChipState();
+    return;
+  }
+  const visible = hfAprsVisiblePackets();
+  hfAprsPacketsEl.innerHTML = "";
+  for (let i = 0; i < visible.length; i++) {
+    hfAprsPacketsEl.appendChild(renderHfAprsRow(visible[i], i === 0));
+  }
+  updateHfAprsSummary();
+  updateHfAprsChipState();
+}
+
+window.resetHfAprsHistoryView = function() {
+  if (hfAprsPacketsEl) hfAprsPacketsEl.innerHTML = "";
+  hfAprsPacketHistory = [];
+  hfAprsBufferedWhilePaused = 0;
+  renderHfAprsHistory();
+};
+
+function addHfAprsPacket(pkt) {
+  const tsMs = Number.isFinite(pkt.ts_ms) ? Number(pkt.ts_ms) : Date.now();
+  pkt._tsMs = tsMs;
+  pkt._ts = new Date(tsMs).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
+
+  hfAprsPacketHistory.unshift(pkt);
+  if (hfAprsPacketHistory.length > HF_APRS_MAX_PACKETS) hfAprsPacketHistory.length = HF_APRS_MAX_PACKETS;
+
+  if (hfAprsPaused) {
+    hfAprsBufferedWhilePaused += 1;
+    updateHfAprsSummary();
+    updateHfAprsChipState();
+    return;
+  }
+
+  renderHfAprsHistory();
+}
+
+document.getElementById("hf-aprs-clear-btn")?.addEventListener("click", async () => {
+  try {
+    await postPath("/clear_hf_aprs_decode");
+    window.resetHfAprsHistoryView();
+  } catch (e) {
+    console.error("HF APRS clear failed", e);
+  }
+});
+
+if (hfAprsPauseBtn) {
+  hfAprsPauseBtn.addEventListener("click", () => {
+    hfAprsPaused = !hfAprsPaused;
+    if (!hfAprsPaused) {
+      hfAprsBufferedWhilePaused = 0;
+      renderHfAprsHistory();
+    } else {
+      updateHfAprsSummary();
+      updateHfAprsChipState();
+    }
+  });
+}
+
+if (hfAprsOnlyPosBtn) {
+  hfAprsOnlyPosBtn.addEventListener("click", () => {
+    hfAprsOnlyPos = !hfAprsOnlyPos;
+    renderHfAprsHistory();
+  });
+}
+
+if (hfAprsHideCrcBtn) {
+  hfAprsHideCrcBtn.addEventListener("click", () => {
+    hfAprsHideCrc = !hfAprsHideCrc;
+    renderHfAprsHistory();
+  });
+}
+
+if (hfAprsCollapseDupBtn) {
+  hfAprsCollapseDupBtn.addEventListener("click", () => {
+    hfAprsCollapseDup = !hfAprsCollapseDup;
+    renderHfAprsHistory();
+  });
+}
+
+["all", "position", "message", "weather", "telemetry", "other"].forEach((type) => {
+  const btn = document.getElementById(`hf-aprs-type-${type}`);
+  if (!btn) return;
+  btn.addEventListener("click", () => {
+    hfAprsTypeFilter = type;
+    renderHfAprsHistory();
+  });
+});
+
+if (hfAprsFilterInput) {
+  hfAprsFilterInput.addEventListener("input", () => {
+    hfAprsFilterText = hfAprsFilterInput.value.trim().toUpperCase();
+    renderHfAprsHistory();
+  });
+}
+
+// --- Server-side HF APRS decode handler ---
+window.onServerHfAprs = function(pkt) {
+  if (hfAprsStatus) hfAprsStatus.textContent = hfAprsPaused ? "Paused" : "Receiving";
+  addHfAprsPacket({
+    receiver: window.getDecodeRigMeta ? window.getDecodeRigMeta() : null,
+    srcCall: pkt.src_call,
+    destCall: pkt.dest_call,
+    path: pkt.path,
+    info: pkt.info,
+    info_bytes: pkt.info_bytes,
+    type: pkt.packet_type,
+    crcOk: pkt.crc_ok,
+    ts_ms: pkt.ts_ms,
+    lat: pkt.lat,
+    lon: pkt.lon,
+    symbolTable: pkt.symbol_table,
+    symbolCode: pkt.symbol_code,
+  });
+};
+
+renderHfAprsHistory();
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/src/api.rs b/src/trx-client/trx-frontend/trx-frontend-http/src/api.rs
index 2d59188..8a070da 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/src/api.rs
+++ b/src/trx-client/trx-frontend/trx-frontend-http/src/api.rs
@@ -283,6 +283,11 @@ pub async fn decode_events(
                 .into_iter()
                 .map(trx_core::decode::DecodedMessage::Aprs),
         );
+        out.extend(
+            crate::server::audio::snapshot_hf_aprs_history(context.get_ref())
+                .into_iter()
+                .map(trx_core::decode::DecodedMessage::HfAprs),
+        );
         out.extend(
             crate::server::audio::snapshot_cw_history(context.get_ref())
                 .into_iter()
@@ -638,6 +643,15 @@ pub async fn toggle_aprs_decode(
     send_command(&rig_tx, RigCommand::SetAprsDecodeEnabled(!enabled)).await
 }
 
+#[post("/toggle_hf_aprs_decode")]
+pub async fn toggle_hf_aprs_decode(
+    state: web::Data<watch::Receiver<RigState>>,
+    rig_tx: web::Data<mpsc::Sender<RigRequest>>,
+) -> Result<HttpResponse, Error> {
+    let enabled = state.get_ref().borrow().hf_aprs_decode_enabled;
+    send_command(&rig_tx, RigCommand::SetHfAprsDecodeEnabled(!enabled)).await
+}
+
 #[post("/toggle_cw_decode")]
 pub async fn toggle_cw_decode(
     state: web::Data<watch::Receiver<RigState>>,
@@ -731,6 +745,15 @@ pub async fn clear_aprs_decode(
     send_command(&rig_tx, RigCommand::ResetAprsDecoder).await
 }
 
+#[post("/clear_hf_aprs_decode")]
+pub async fn clear_hf_aprs_decode(
+    context: web::Data<Arc<FrontendRuntimeContext>>,
+    rig_tx: web::Data<mpsc::Sender<RigRequest>>,
+) -> Result<HttpResponse, Error> {
+    crate::server::audio::clear_hf_aprs_history(context.get_ref());
+    send_command(&rig_tx, RigCommand::ResetHfAprsDecoder).await
+}
+
 #[post("/clear_ais_decode")]
 pub async fn clear_ais_decode(
     context: web::Data<Arc<FrontendRuntimeContext>>,
@@ -1009,6 +1032,7 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
         .service(set_wfm_stereo)
         .service(set_wfm_denoise)
         .service(toggle_aprs_decode)
+        .service(toggle_hf_aprs_decode)
         .service(toggle_cw_decode)
         .service(set_cw_auto)
         .service(set_cw_wpm)
@@ -1018,6 +1042,7 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
         .service(clear_ais_decode)
         .service(clear_vdes_decode)
         .service(clear_aprs_decode)
+        .service(clear_hf_aprs_decode)
         .service(clear_cw_decode)
         .service(clear_ft8_decode)
         .service(clear_wspr_decode)
@@ -1038,6 +1063,7 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
         .service(ais_js)
         .service(vdes_js)
         .service(aprs_js)
+        .service(hf_aprs_js)
         .service(ft8_js)
         .service(wspr_js)
         .service(cw_js)
@@ -1123,6 +1149,16 @@ async fn aprs_js() -> impl Responder {
         .body(status::APRS_JS)
 }
 
+#[get("/hf-aprs.js")]
+async fn hf_aprs_js() -> impl Responder {
+    HttpResponse::Ok()
+        .insert_header((
+            header::CONTENT_TYPE,
+            "application/javascript; charset=utf-8",
+        ))
+        .body(status::HF_APRS_JS)
+}
+
 #[get("/ais.js")]
 async fn ais_js() -> impl Responder {
     HttpResponse::Ok()
@@ -1256,6 +1292,7 @@ async fn wait_for_view(mut rx: watch::Receiver<RigState>) -> Result<RigSnapshot,
         server_longitude: state.server_longitude,
         pskreporter_status: state.pskreporter_status,
         aprs_decode_enabled: state.aprs_decode_enabled,
+        hf_aprs_decode_enabled: state.hf_aprs_decode_enabled,
         cw_decode_enabled: state.cw_decode_enabled,
         cw_auto: state.cw_auto,
         cw_wpm: state.cw_wpm,
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/src/audio.rs b/src/trx-client/trx-frontend/trx-frontend-http/src/audio.rs
index 76e7188..11bbd8e 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/src/audio.rs
+++ b/src/trx-client/trx-frontend/trx-frontend-http/src/audio.rs
@@ -44,6 +44,15 @@ fn prune_aprs_history(history: &mut VecDeque<(Instant, AprsPacket)>) {
     }
 }
 
+fn prune_hf_aprs_history(history: &mut VecDeque<(Instant, AprsPacket)>) {
+    while let Some((ts, _)) = history.front() {
+        if ts.elapsed() <= HISTORY_RETENTION {
+            break;
+        }
+        history.pop_front();
+    }
+}
+
 fn prune_ais_history(history: &mut VecDeque<(Instant, AisMessage)>) {
     while let Some((ts, _)) = history.front() {
         if ts.elapsed() <= HISTORY_RETENTION {
@@ -125,6 +134,18 @@ fn record_aprs(context: &FrontendRuntimeContext, mut pkt: AprsPacket) {
     prune_aprs_history(&mut history);
 }
 
+fn record_hf_aprs(context: &FrontendRuntimeContext, mut pkt: AprsPacket) {
+    if pkt.ts_ms.is_none() {
+        pkt.ts_ms = Some(current_timestamp_ms());
+    }
+    let mut history = context
+        .hf_aprs_history
+        .lock()
+        .expect("hf_aprs history mutex poisoned");
+    history.push_back((Instant::now(), pkt));
+    prune_hf_aprs_history(&mut history);
+}
+
 fn record_cw(context: &FrontendRuntimeContext, event: CwEvent) {
     let mut history = context
         .cw_history
@@ -161,6 +182,15 @@ pub fn snapshot_aprs_history(context: &FrontendRuntimeContext) -> Vec<AprsPacket
     history.iter().map(|(_, pkt)| pkt.clone()).collect()
 }
 
+pub fn snapshot_hf_aprs_history(context: &FrontendRuntimeContext) -> Vec<AprsPacket> {
+    let mut history = context
+        .hf_aprs_history
+        .lock()
+        .expect("hf_aprs history mutex poisoned");
+    prune_hf_aprs_history(&mut history);
+    history.iter().map(|(_, pkt)| pkt.clone()).collect()
+}
+
 pub fn snapshot_ais_history(context: &FrontendRuntimeContext) -> Vec<AisMessage> {
     let mut history = context
         .ais_history
@@ -214,6 +244,14 @@ pub fn clear_aprs_history(context: &FrontendRuntimeContext) {
     history.clear();
 }
 
+pub fn clear_hf_aprs_history(context: &FrontendRuntimeContext) {
+    let mut history = context
+        .hf_aprs_history
+        .lock()
+        .expect("hf_aprs history mutex poisoned");
+    history.clear();
+}
+
 pub fn clear_ais_history(context: &FrontendRuntimeContext) {
     let mut history = context
         .ais_history
@@ -280,6 +318,7 @@ pub fn start_decode_history_collector(context: Arc<FrontendRuntimeContext>) {
                     DecodedMessage::Ais(msg) => record_ais(&context, msg),
                     DecodedMessage::Vdes(msg) => record_vdes(&context, msg),
                     DecodedMessage::Aprs(pkt) => record_aprs(&context, pkt),
+                    DecodedMessage::HfAprs(pkt) => record_hf_aprs(&context, pkt),
                     DecodedMessage::Cw(evt) => record_cw(&context, evt),
                     DecodedMessage::Ft8(msg) => record_ft8(&context, msg),
                     DecodedMessage::Wspr(msg) => record_wspr(&context, msg),
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/src/status.rs b/src/trx-client/trx-frontend/trx-frontend-http/src/status.rs
index 9c0e4bc..06da69f 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/src/status.rs
+++ b/src/trx-client/trx-frontend/trx-frontend-http/src/status.rs
@@ -15,6 +15,7 @@ pub const LEAFLET_AIS_TRACKSYMBOL_JS: &str =
 pub const AIS_JS: &str = include_str!("../assets/web/plugins/ais.js");
 pub const VDES_JS: &str = include_str!("../assets/web/plugins/vdes.js");
 pub const APRS_JS: &str = include_str!("../assets/web/plugins/aprs.js");
+pub const HF_APRS_JS: &str = include_str!("../assets/web/plugins/hf-aprs.js");
 pub const FT8_JS: &str = include_str!("../assets/web/plugins/ft8.js");
 pub const WSPR_JS: &str = include_str!("../assets/web/plugins/wspr.js");
 pub const CW_JS: &str = include_str!("../assets/web/plugins/cw.js");
diff --git a/src/trx-core/src/decode.rs b/src/trx-core/src/decode.rs
index 6f92bba..66622c4 100644
--- a/src/trx-core/src/decode.rs
+++ b/src/trx-core/src/decode.rs
@@ -16,6 +16,8 @@ pub enum DecodedMessage {
     Vdes(VdesMessage),
     #[serde(rename = "aprs")]
     Aprs(AprsPacket),
+    #[serde(rename = "hf_aprs")]
+    HfAprs(AprsPacket),
     #[serde(rename = "cw")]
     Cw(CwEvent),
     #[serde(rename = "ft8")]
diff --git a/src/trx-core/src/rig/command.rs b/src/trx-core/src/rig/command.rs
index 0486da2..492f425 100644
--- a/src/trx-core/src/rig/command.rs
+++ b/src/trx-core/src/rig/command.rs
@@ -22,6 +22,7 @@ pub enum RigCommand {
     Lock,
     Unlock,
     SetAprsDecodeEnabled(bool),
+    SetHfAprsDecodeEnabled(bool),
     SetCwDecodeEnabled(bool),
     SetCwAuto(bool),
     SetCwWpm(u32),
@@ -29,6 +30,7 @@ pub enum RigCommand {
     SetFt8DecodeEnabled(bool),
     SetWsprDecodeEnabled(bool),
     ResetAprsDecoder,
+    ResetHfAprsDecoder,
     ResetCwDecoder,
     ResetFt8Decoder,
     ResetWsprDecoder,
diff --git a/src/trx-core/src/rig/controller/handlers.rs b/src/trx-core/src/rig/controller/handlers.rs
index 768f4fc..c5c772b 100644
--- a/src/trx-core/src/rig/controller/handlers.rs
+++ b/src/trx-core/src/rig/controller/handlers.rs
@@ -510,6 +510,8 @@ pub fn command_from_rig_command(cmd: RigCommand) -> Box<dyn RigCommandHandler> {
         | RigCommand::SetCwToneHz(_)
         | RigCommand::SetFt8DecodeEnabled(_)
         | RigCommand::SetWsprDecodeEnabled(_)
+        | RigCommand::SetHfAprsDecodeEnabled(_)
+        | RigCommand::ResetHfAprsDecoder
         | RigCommand::ResetAprsDecoder
         | RigCommand::ResetCwDecoder
         | RigCommand::ResetFt8Decoder
diff --git a/src/trx-core/src/rig/state.rs b/src/trx-core/src/rig/state.rs
index fa2482c..0f59e81 100644
--- a/src/trx-core/src/rig/state.rs
+++ b/src/trx-core/src/rig/state.rs
@@ -31,6 +31,8 @@ pub struct RigState {
     #[serde(default)]
     pub aprs_decode_enabled: bool,
     #[serde(default)]
+    pub hf_aprs_decode_enabled: bool,
+    #[serde(default)]
     pub cw_decode_enabled: bool,
     #[serde(default)]
     pub ft8_decode_enabled: bool,
@@ -53,6 +55,8 @@ pub struct RigState {
     #[serde(default, skip_serializing)]
     pub aprs_decode_reset_seq: u64,
     #[serde(default, skip_serializing)]
+    pub hf_aprs_decode_reset_seq: u64,
+    #[serde(default, skip_serializing)]
     pub cw_decode_reset_seq: u64,
     #[serde(default, skip_serializing)]
     pub ft8_decode_reset_seq: u64,
@@ -132,6 +136,7 @@ impl RigState {
             server_longitude: None,
             pskreporter_status: None,
             aprs_decode_enabled: false,
+            hf_aprs_decode_enabled: false,
             cw_decode_enabled: true,
             ft8_decode_enabled: false,
             wspr_decode_enabled: false,
@@ -141,6 +146,7 @@ impl RigState {
             filter: None,
             spectrum: None,
             aprs_decode_reset_seq: 0,
+            hf_aprs_decode_reset_seq: 0,
             cw_decode_reset_seq: 0,
             ft8_decode_reset_seq: 0,
             wspr_decode_reset_seq: 0,
@@ -193,6 +199,7 @@ impl RigState {
             server_longitude: snapshot.server_longitude,
             pskreporter_status: snapshot.pskreporter_status,
             aprs_decode_enabled: snapshot.aprs_decode_enabled,
+            hf_aprs_decode_enabled: snapshot.hf_aprs_decode_enabled,
             cw_decode_enabled: snapshot.cw_decode_enabled,
             cw_auto: snapshot.cw_auto,
             cw_wpm: snapshot.cw_wpm,
@@ -202,6 +209,7 @@ impl RigState {
             filter: snapshot.filter,
             spectrum: None, // spectrum flows through /api/spectrum, not persistent state
             aprs_decode_reset_seq: 0,
+            hf_aprs_decode_reset_seq: 0,
             cw_decode_reset_seq: 0,
             ft8_decode_reset_seq: 0,
             wspr_decode_reset_seq: 0,
@@ -232,6 +240,7 @@ impl RigState {
             server_longitude: self.server_longitude,
             pskreporter_status: self.pskreporter_status.clone(),
             aprs_decode_enabled: self.aprs_decode_enabled,
+            hf_aprs_decode_enabled: self.hf_aprs_decode_enabled,
             cw_decode_enabled: self.cw_decode_enabled,
             cw_auto: self.cw_auto,
             cw_wpm: self.cw_wpm,
@@ -384,6 +393,8 @@ pub struct RigSnapshot {
     #[serde(default)]
     pub aprs_decode_enabled: bool,
     #[serde(default)]
+    pub hf_aprs_decode_enabled: bool,
+    #[serde(default)]
     pub cw_decode_enabled: bool,
     #[serde(default)]
     pub ft8_decode_enabled: bool,
diff --git a/src/trx-protocol/src/codec.rs b/src/trx-protocol/src/codec.rs
index d1adcd8..659b289 100644
--- a/src/trx-protocol/src/codec.rs
+++ b/src/trx-protocol/src/codec.rs
@@ -425,6 +425,7 @@ mod tests {
             server_longitude: None,
             pskreporter_status: None,
             aprs_decode_enabled: false,
+            hf_aprs_decode_enabled: false,
             cw_decode_enabled: false,
             ft8_decode_enabled: false,
             wspr_decode_enabled: false,
diff --git a/src/trx-protocol/src/mapping.rs b/src/trx-protocol/src/mapping.rs
index 641b54b..752fc62 100644
--- a/src/trx-protocol/src/mapping.rs
+++ b/src/trx-protocol/src/mapping.rs
@@ -34,6 +34,9 @@ pub fn client_command_to_rig(cmd: ClientCommand) -> RigCommand {
         ClientCommand::SetAprsDecodeEnabled { enabled } => {
             RigCommand::SetAprsDecodeEnabled(enabled)
         }
+        ClientCommand::SetHfAprsDecodeEnabled { enabled } => {
+            RigCommand::SetHfAprsDecodeEnabled(enabled)
+        }
         ClientCommand::SetCwDecodeEnabled { enabled } => RigCommand::SetCwDecodeEnabled(enabled),
         ClientCommand::SetCwAuto { enabled } => RigCommand::SetCwAuto(enabled),
         ClientCommand::SetCwWpm { wpm } => RigCommand::SetCwWpm(wpm),
@@ -43,6 +46,7 @@ pub fn client_command_to_rig(cmd: ClientCommand) -> RigCommand {
             RigCommand::SetWsprDecodeEnabled(enabled)
         }
         ClientCommand::ResetAprsDecoder => RigCommand::ResetAprsDecoder,
+        ClientCommand::ResetHfAprsDecoder => RigCommand::ResetHfAprsDecoder,
         ClientCommand::ResetCwDecoder => RigCommand::ResetCwDecoder,
         ClientCommand::ResetFt8Decoder => RigCommand::ResetFt8Decoder,
         ClientCommand::ResetWsprDecoder => RigCommand::ResetWsprDecoder,
@@ -88,6 +92,9 @@ pub fn rig_command_to_client(cmd: RigCommand) -> ClientCommand {
         RigCommand::SetAprsDecodeEnabled(enabled) => {
             ClientCommand::SetAprsDecodeEnabled { enabled }
         }
+        RigCommand::SetHfAprsDecodeEnabled(enabled) => {
+            ClientCommand::SetHfAprsDecodeEnabled { enabled }
+        }
         RigCommand::SetCwDecodeEnabled(enabled) => ClientCommand::SetCwDecodeEnabled { enabled },
         RigCommand::SetCwAuto(enabled) => ClientCommand::SetCwAuto { enabled },
         RigCommand::SetCwWpm(wpm) => ClientCommand::SetCwWpm { wpm },
@@ -97,6 +104,7 @@ pub fn rig_command_to_client(cmd: RigCommand) -> ClientCommand {
             ClientCommand::SetWsprDecodeEnabled { enabled }
         }
         RigCommand::ResetAprsDecoder => ClientCommand::ResetAprsDecoder,
+        RigCommand::ResetHfAprsDecoder => ClientCommand::ResetHfAprsDecoder,
         RigCommand::ResetCwDecoder => ClientCommand::ResetCwDecoder,
         RigCommand::ResetFt8Decoder => ClientCommand::ResetFt8Decoder,
         RigCommand::ResetWsprDecoder => ClientCommand::ResetWsprDecoder,
diff --git a/src/trx-protocol/src/types.rs b/src/trx-protocol/src/types.rs
index 307580d..18695a4 100644
--- a/src/trx-protocol/src/types.rs
+++ b/src/trx-protocol/src/types.rs
@@ -27,6 +27,7 @@ pub enum ClientCommand {
     GetTxLimit,
     SetTxLimit { limit: u8 },
     SetAprsDecodeEnabled { enabled: bool },
+    SetHfAprsDecodeEnabled { enabled: bool },
     SetCwDecodeEnabled { enabled: bool },
     SetCwAuto { enabled: bool },
     SetCwWpm { wpm: u32 },
@@ -34,6 +35,7 @@ pub enum ClientCommand {
     SetFt8DecodeEnabled { enabled: bool },
     SetWsprDecodeEnabled { enabled: bool },
     ResetAprsDecoder,
+    ResetHfAprsDecoder,
     ResetCwDecoder,
     ResetFt8Decoder,
     ResetWsprDecoder,
diff --git a/src/trx-server/src/aprsfi.rs b/src/trx-server/src/aprsfi.rs
index 5bd234d..6353180 100644
--- a/src/trx-server/src/aprsfi.rs
+++ b/src/trx-server/src/aprsfi.rs
@@ -203,7 +203,7 @@ pub async fn run_aprsfi_uplink(
 
                 recv = decode_rx.recv() => {
                     match recv {
-                        Ok(DecodedMessage::Aprs(pkt)) => {
+                        Ok(DecodedMessage::Aprs(pkt)) | Ok(DecodedMessage::HfAprs(pkt)) => {
                             stats_received += 1;
                             if !pkt.crc_ok {
                                 stats_skipped += 1;
diff --git a/src/trx-server/src/audio.rs b/src/trx-server/src/audio.rs
index 52f0a74..08c4ca1 100644
--- a/src/trx-server/src/audio.rs
+++ b/src/trx-server/src/audio.rs
@@ -38,6 +38,7 @@ use crate::config::AudioConfig;
 use trx_decode_log::DecoderLoggers;
 
 const APRS_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
+const HF_APRS_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
 const AIS_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
 const VDES_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
 const CW_HISTORY_RETENTION: Duration = Duration::from_secs(24 * 60 * 60);
@@ -145,6 +146,7 @@ pub struct DecoderHistories {
     pub ais: Mutex<VecDeque<(Instant, AisMessage)>>,
     pub vdes: Mutex<VecDeque<(Instant, VdesMessage)>>,
     pub aprs: Mutex<VecDeque<(Instant, AprsPacket)>>,
+    pub hf_aprs: Mutex<VecDeque<(Instant, AprsPacket)>>,
     pub cw: Mutex<VecDeque<(Instant, CwEvent)>>,
     pub ft8: Mutex<VecDeque<(Instant, Ft8Message)>>,
     pub wspr: Mutex<VecDeque<(Instant, WsprMessage)>>,
@@ -156,6 +158,7 @@ impl DecoderHistories {
             ais: Mutex::new(VecDeque::new()),
             vdes: Mutex::new(VecDeque::new()),
             aprs: Mutex::new(VecDeque::new()),
+            hf_aprs: Mutex::new(VecDeque::new()),
             cw: Mutex::new(VecDeque::new()),
             ft8: Mutex::new(VecDeque::new()),
             wspr: Mutex::new(VecDeque::new()),
@@ -256,6 +259,44 @@ impl DecoderHistories {
             .clear();
     }
 
+    // --- HF APRS ---
+
+    fn prune_hf_aprs(history: &mut VecDeque<(Instant, AprsPacket)>) {
+        let cutoff = Instant::now() - HF_APRS_HISTORY_RETENTION;
+        while let Some((ts, _)) = history.front() {
+            if *ts < cutoff {
+                history.pop_front();
+            } else {
+                break;
+            }
+        }
+    }
+
+    pub fn record_hf_aprs_packet(&self, mut pkt: AprsPacket) {
+        if !pkt.crc_ok {
+            return;
+        }
+        if pkt.ts_ms.is_none() {
+            pkt.ts_ms = Some(current_timestamp_ms());
+        }
+        let mut h = self.hf_aprs.lock().expect("hf_aprs history mutex poisoned");
+        h.push_back((Instant::now(), pkt));
+        Self::prune_hf_aprs(&mut h);
+    }
+
+    pub fn snapshot_hf_aprs_history(&self) -> Vec<AprsPacket> {
+        let mut h = self.hf_aprs.lock().expect("hf_aprs history mutex poisoned");
+        Self::prune_hf_aprs(&mut h);
+        h.iter().map(|(_, pkt)| pkt.clone()).collect()
+    }
+
+    pub fn clear_hf_aprs_history(&self) {
+        self.hf_aprs
+            .lock()
+            .expect("hf_aprs history mutex poisoned")
+            .clear();
+    }
+
     // --- CW ---
 
     fn prune_cw(history: &mut VecDeque<(Instant, CwEvent)>) {
@@ -352,10 +393,11 @@ impl DecoderHistories {
         let ais = self.ais.lock().map(|h| h.len()).unwrap_or(0);
         let vdes = self.vdes.lock().map(|h| h.len()).unwrap_or(0);
         let aprs = self.aprs.lock().map(|h| h.len()).unwrap_or(0);
+        let hf_aprs = self.hf_aprs.lock().map(|h| h.len()).unwrap_or(0);
         let cw = self.cw.lock().map(|h| h.len()).unwrap_or(0);
         let ft8 = self.ft8.lock().map(|h| h.len()).unwrap_or(0);
         let wspr = self.wspr.lock().map(|h| h.len()).unwrap_or(0);
-        ais + vdes + aprs + cw + ft8 + wspr
+        ais + vdes + aprs + hf_aprs + cw + ft8 + wspr
     }
 }
 
@@ -945,6 +987,101 @@ pub async fn run_aprs_decoder(
     }
 }
 
+pub async fn run_hf_aprs_decoder(
+    sample_rate: u32,
+    channels: u16,
+    mut pcm_rx: broadcast::Receiver<Vec<f32>>,
+    mut state_rx: watch::Receiver<RigState>,
+    decode_tx: broadcast::Sender<DecodedMessage>,
+    decode_logs: Option<Arc<DecoderLoggers>>,
+    histories: Arc<DecoderHistories>,
+) {
+    info!("HF APRS decoder started ({}Hz, {} ch)", sample_rate, channels);
+    let mut decoder = AprsDecoder::new_hf(sample_rate);
+    let mut was_active = false;
+    let mut last_reset_seq: u64 = 0;
+    let mut active = matches!(state_rx.borrow().status.mode, RigMode::DIG);
+
+    loop {
+        if !active {
+            match state_rx.changed().await {
+                Ok(()) => {
+                    let state = state_rx.borrow();
+                    active = matches!(state.status.mode, RigMode::DIG);
+                    if active {
+                        pcm_rx = pcm_rx.resubscribe();
+                    }
+                    if state.hf_aprs_decode_reset_seq != last_reset_seq {
+                        last_reset_seq = state.hf_aprs_decode_reset_seq;
+                        decoder.reset();
+                        info!("HF APRS decoder reset (seq={})", last_reset_seq);
+                    }
+                }
+                Err(_) => break,
+            }
+            continue;
+        }
+
+        tokio::select! {
+            recv = pcm_rx.recv() => {
+                match recv {
+                    Ok(frame) => {
+                        let state = state_rx.borrow();
+                        if state.hf_aprs_decode_reset_seq != last_reset_seq {
+                            last_reset_seq = state.hf_aprs_decode_reset_seq;
+                            decoder.reset();
+                            info!("HF APRS decoder reset (seq={})", last_reset_seq);
+                        }
+
+                        let mut mono = downmix_if_needed(frame, channels);
+                        apply_decode_audio_gate(&mut mono);
+
+                        was_active = true;
+                        for mut pkt in decoder.process_samples(&mono) {
+                            if let Some(logger) = decode_logs.as_ref() {
+                                logger.log_aprs(&pkt);
+                            }
+                            if !pkt.crc_ok {
+                                continue;
+                            }
+                            if pkt.ts_ms.is_none() {
+                                pkt.ts_ms = Some(current_timestamp_ms());
+                            }
+                            histories.record_hf_aprs_packet(pkt.clone());
+                            let _ = decode_tx.send(DecodedMessage::HfAprs(pkt));
+                        }
+                    }
+                    Err(broadcast::error::RecvError::Lagged(n)) => {
+                        warn!("HF APRS decoder: dropped {} PCM frames", n);
+                    }
+                    Err(broadcast::error::RecvError::Closed) => break,
+                }
+            }
+            changed = state_rx.changed() => {
+                match changed {
+                    Ok(()) => {
+                        let state = state_rx.borrow();
+                        active = matches!(state.status.mode, RigMode::DIG);
+                        if state.hf_aprs_decode_reset_seq != last_reset_seq {
+                            last_reset_seq = state.hf_aprs_decode_reset_seq;
+                            decoder.reset();
+                            info!("HF APRS decoder reset (seq={})", last_reset_seq);
+                        }
+                        if !active && was_active {
+                            decoder.reset();
+                            was_active = false;
+                        }
+                        if active {
+                            pcm_rx = pcm_rx.resubscribe();
+                        }
+                    }
+                    Err(_) => break,
+                }
+            }
+        }
+    }
+}
+
 fn downmix_if_needed(frame: Vec<f32>, channels: u16) -> Vec<f32> {
     if channels <= 1 {
         return frame;
diff --git a/src/trx-server/src/main.rs b/src/trx-server/src/main.rs
index 1daf5e0..84bbcc3 100644
--- a/src/trx-server/src/main.rs
+++ b/src/trx-server/src/main.rs
@@ -630,6 +630,22 @@ fn spawn_rig_audio_stack(
             }
         }));
 
+        // Spawn HF APRS decoder task
+        let hf_aprs_pcm_rx = pcm_tx.subscribe();
+        let hf_aprs_state_rx = state_rx.clone();
+        let hf_aprs_decode_tx = decode_tx.clone();
+        let hf_aprs_sr = rig_cfg.audio.sample_rate;
+        let hf_aprs_ch = rig_cfg.audio.channels;
+        let hf_aprs_shutdown_rx = shutdown_rx.clone();
+        let hf_aprs_logs = decoder_logs.clone();
+        let hf_aprs_histories = histories.clone();
+        handles.push(tokio::spawn(async move {
+            tokio::select! {
+                _ = audio::run_hf_aprs_decoder(hf_aprs_sr, hf_aprs_ch as u16, hf_aprs_pcm_rx, hf_aprs_state_rx, hf_aprs_decode_tx, hf_aprs_logs, hf_aprs_histories) => {}
+                _ = wait_for_shutdown(hf_aprs_shutdown_rx) => {}
+            }
+        }));
+
         if let Some((ais_a_pcm_rx, ais_b_pcm_rx)) = sdr_ais_pcm_rx {
             let ais_state_rx = state_rx.clone();
             let ais_decode_tx = decode_tx.clone();
diff --git a/src/trx-server/src/rig_task.rs b/src/trx-server/src/rig_task.rs
index 0324b71..ecf161f 100644
--- a/src/trx-server/src/rig_task.rs
+++ b/src/trx-server/src/rig_task.rs
@@ -436,6 +436,17 @@ async fn process_command(
             let _ = ctx.state_tx.send(ctx.state.clone());
             return snapshot_from(ctx.state);
         }
+        RigCommand::SetHfAprsDecodeEnabled(en) => {
+            ctx.state.hf_aprs_decode_enabled = en;
+            let _ = ctx.state_tx.send(ctx.state.clone());
+            return snapshot_from(ctx.state);
+        }
+        RigCommand::ResetHfAprsDecoder => {
+            ctx.histories.clear_hf_aprs_history();
+            ctx.state.hf_aprs_decode_reset_seq += 1;
+            let _ = ctx.state_tx.send(ctx.state.clone());
+            return snapshot_from(ctx.state);
+        }
         RigCommand::ResetCwDecoder => {
             ctx.histories.clear_cw_history();
             ctx.state.cw_decode_reset_seq += 1;