bugfixes

oms-tui/oms_tui/app.py

@@ -18,6 +18,7 @@ from rich.console import Group
 from rich.table import Table
 from rich.text import Text
 from textual.app import App, ComposeResult
+from textual.binding import Binding
 from textual.containers import Horizontal, Vertical, VerticalScroll
 from textual.message import Message
 from textual.screen import ModalScreen
@@ -41,6 +42,19 @@ def rel_time(ts: float) -> str:
     return f"{d // 3600}h {(d % 3600) // 60}m ago"
 
 
+def fmt_duration(seconds: Optional[float]) -> str:
+    if seconds is None:
+        return "?"
+    s = int(round(seconds))
+    if s < 60:
+        return f"{s}s"
+    if s < 3600:
+        return f"{s // 60}m {s % 60:02d}s"
+    if s < 86400:
+        return f"{s // 3600}h {(s % 3600) // 60:02d}m"
+    return f"{s // 86400}d {(s % 86400) // 3600:02d}h"
+
+
 def stream_text(ts_str: str, ev: dict) -> Text:
     if ev.get("type") == "json":
         fields = ev.get("fields", {})
@@ -109,6 +123,8 @@ class OmsApp(App[None]):
         ("a", "show_all", "Show all / stream"),
         ("enter", "select", "Select device"),
         ("q", "quit", "Quit"),
+        # priority so Ctrl+C quits even while a modal Input is focused
+        Binding("ctrl+c", "quit", "Quit", priority=True, show=False),
     ]
 
     COLUMNS = [
@@ -337,6 +353,17 @@ class OmsApp(App[None]):
         meta.add_row("link (C)", dev.c_field or "?")
         meta.add_row("rssi", "?" if dev.rssi is None else f"{dev.rssi} dBm")
         meta.add_row("telegrams", str(dev.count))
+        if dev.interval_samples >= 1:
+            est = fmt_duration(dev.interval_estimate)
+            last = fmt_duration(dev.interval_last)
+            detail = f"~{est}"
+            extra = f"last {last}, {dev.interval_samples} sample"
+            extra += "s" if dev.interval_samples != 1 else ""
+            interval_text = Text(detail, style="bold")
+            interval_text.append(f"  ({extra})", style="dim")
+            meta.add_row("send interval", interval_text)
+        else:
+            meta.add_row("send interval", Text("— (need ≥2 telegrams)", style="dim"))
         meta.add_row(
             "first seen", time.strftime("%H:%M:%S", time.localtime(dev.first_seen))
         )

oms-tui/oms_tui/csvio.py

@@ -19,6 +19,8 @@ FIELDNAMES = [
     "last_seen",
     "count",
     "rssi",
+    "interval_s",
+    "interval_samples",
     "encryption",
     "security_mode",
     "status",
@@ -50,6 +52,11 @@ def export_devices(path: str, devices: Iterable[Device]) -> int:
                     "last_seen": _fmt_time(d.last_seen),
                     "count": d.count,
                     "rssi": "" if d.rssi is None else d.rssi,
+                    "interval_s": (
+                        "" if d.interval_estimate is None
+                        else round(d.interval_estimate, 1)
+                    ),
+                    "interval_samples": d.interval_samples,
                     "encryption": d.encryption,
                     "security_mode": d.sec_mode or "",
                     "status": d.status,

oms-tui/oms_tui/models.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import statistics
 import time
 from collections import deque
 from dataclasses import dataclass, field
@@ -42,6 +43,37 @@ class Device:
         default_factory=lambda: deque(maxlen=500)
     )
     _last_count_at: float = 0.0     # for de-duplicating multi-meter DLL bursts
+    # arrival times of counted telegrams, for estimating the send interval
+    rx_times: Deque[float] = field(default_factory=lambda: deque(maxlen=64))
+
+    @property
+    def intervals(self) -> List[float]:
+        t = list(self.rx_times)
+        return [b - a for a, b in zip(t, t[1:])]
+
+    @property
+    def interval_samples(self) -> int:
+        return max(0, len(self.rx_times) - 1)
+
+    @property
+    def interval_estimate(self) -> Optional[float]:
+        """Best estimate of the transmit period: median of observed gaps.
+
+        Median is robust to missed telegrams (which show up as gaps that are
+        multiples of the true period) and to the odd retransmission burst.
+        """
+        gaps = self.intervals
+        return statistics.median(gaps) if gaps else None
+
+    @property
+    def interval_last(self) -> Optional[float]:
+        gaps = self.intervals
+        return gaps[-1] if gaps else None
+
+    @property
+    def interval_min(self) -> Optional[float]:
+        gaps = self.intervals
+        return min(gaps) if gaps else None
 
     @property
     def encryption(self) -> str:
@@ -113,6 +145,20 @@ class DeviceStore:
     def ordered(self) -> List[Device]:
         return [self.devices[i] for i in self.order]
 
+    @staticmethod
+    def _note_telegram(dev: Device, now: float) -> None:
+        """Count one telegram and record its arrival, de-duplicating the
+        multi-line burst a single telegram produces (DLL[+DLL]+ELL+TPL+JSON,
+        all within microseconds) so counts and the interval stay accurate.
+
+        Driven by *any* telegram-level event, so a DLL line we fail to parse
+        can't silently zero out the count and send-interval.
+        """
+        if dev._last_count_at == 0.0 or (now - dev._last_count_at) > COUNT_DEDUP_WINDOW:
+            dev.count += 1
+            dev.rx_times.append(now)
+        dev._last_count_at = now
+
     def _get_or_create(self, device_id: str, now: float) -> Tuple[Device, bool]:
         dev = self.devices.get(device_id)
         if dev is None:
@@ -134,11 +180,7 @@ class DeviceStore:
         if ev.get("rssi") is not None:
             dev.rssi = ev["rssi"]
         dev.last_seen = now
-        # Count once per telegram, ignoring the duplicate DLL burst from a
-        # second matching meter.
-        if is_new or (now - dev._last_count_at) > COUNT_DEDUP_WINDOW:
-            dev.count += 1
-        dev._last_count_at = now
+        self._note_telegram(dev, now)
         return dev, is_new
 
     def apply_ell(self, ev: dict, device_id: Optional[str]) -> Optional[Device]:
@@ -192,4 +234,8 @@ class DeviceStore:
             if from_key:
                 dev.key_decrypted = True
         dev.last_seen = now
+        # Also drive the counter from JSON, so telegrams still count even if
+        # their DLL line failed to parse. The dedup window collapses the DLL
+        # and its JSON (same telegram) into one.
+        self._note_telegram(dev, now)
         return dev, is_new

oms-tui/oms_tui/parser.py

@@ -27,7 +27,9 @@ _DLL_RE = re.compile(
     r"M=(?P<mhex>[0-9a-fA-F]+) \((?P<mfct>[A-Z?]+)\) "
     r"A=(?P<id>\w+) "
     r"VER=(?P<ver>[0-9a-fA-F]+) "
-    r"TYPE=(?P<type>[0-9a-fA-F]+) \((?P<media>[^)]*)\) "
+    # media can itself contain parentheses, e.g. "Radio converter (meter side)";
+    # match lazily up to the " (driver ...)" that always follows.
+    r"TYPE=(?P<type>[0-9a-fA-F]+) \((?P<media>.*?)\) "
     r"\(driver (?P<driver>\w+)\)"
     r"(?:.*?RSSI=(?P<rssi>-?\d+))?"
 )