diff --git a/src/pqnstack/pqn/drivers/rotator.py b/src/pqnstack/pqn/drivers/rotator.py
index 4f76a55f..e33f16a6 100644
--- a/src/pqnstack/pqn/drivers/rotator.py
+++ b/src/pqnstack/pqn/drivers/rotator.py
@@ -147,7 +147,6 @@ def info(self) -> RotatorInfo:
             name=self.name,
             desc=self.desc,
             hw_address=self.hw_address,
-            # hw_status=,
             degrees=self.degrees,
             offset_degrees=self.offset_degrees,
         )
@@ -161,3 +160,355 @@ def degrees(self, degrees: float) -> None:
         self._conn.write(f"SRA {degrees}".encode())
         self._degrees = degrees
         _ = self._conn.readline().decode()
+
+
+@dataclass(slots=True)
+class ELL14KRotator(RotatorInstrument):
+    addr_hex: str = "0"
+    block_while_moving: bool = True
+    timeout_s: float = 2.5
+    handshake_retries: int = 3
+    home_on_start: bool = False
+
+    _ENCODER_UNITS_PER_DEGREE: float = 262144.0 / 360.0
+    _degrees: float = 0.0
+    _conn: serial.Serial = field(init=False, repr=False)
+    _travel_deg: int = field(init=False, default=360, repr=False)
+
+    _WAIT_TIMEOUT_S: float = field(init=False, default=10.0, repr=False)
+    _DRAIN_SLEEP_S: float = field(init=False, default=0.005, repr=False)
+
+    def start(self) -> None:
+        self.parameters.add("velocity_percent")
+        self._open_port()
+        parsed, addr = self._identify()
+        self.addr_hex = addr
+        self._init_scale(parsed)
+        self._sync_angle()
+        self._maybe_home()
+
+    def close(self) -> None:
+        try:
+            self.degrees = 0.0
+        except (OSError, RuntimeError) as exc:
+            logger.warning("ell14k.close.zero_failed err=%r", exc)
+        try:
+            self._conn.close()
+        except (OSError, RuntimeError) as exc:
+            logger.warning("ell14k.close.serial_failed err=%r", exc)
+
+    @property
+    def info(self) -> RotatorInfo:
+        return RotatorInfo(
+            name=self.name,
+            desc=self.desc,
+            hw_address=self.hw_address,
+            degrees=self.degrees,
+            offset_degrees=self.offset_degrees,
+        )
+
+    @property
+    def degrees(self) -> float:
+        return self._degrees
+
+    @degrees.setter
+    def degrees(self, degrees: float) -> None:
+        target = (degrees + self.offset_degrees) % 360.0
+        if self._ENCODER_UNITS_PER_DEGREE > 0:
+            eu_full_rev = int(self._ENCODER_UNITS_PER_DEGREE * 360.0)
+            eu = round((target % 360.0) * self._ENCODER_UNITS_PER_DEGREE) % eu_full_rev
+        else:
+            eu = 0
+
+        cmd = f"{self.addr_hex}ma{eu:08X}"
+        gs0 = self._get_status()
+        t0 = time.time()
+        self._send(cmd)
+        logger.info("ell14k.move_to tx=%s target_deg=%.9f eu=%08X status_before=%r", cmd, target, eu, gs0)
+        if self.block_while_moving:
+            self._wait_for_completion()
+        pos = self._get_position_eu()
+        gs1 = self._get_status()
+        if pos is None:
+            self._degrees = degrees % 360.0
+            logger.warning(
+                "ell14k.move_to.readback_none kept_req_deg=%.9f elapsed=%.3fs status_after=%r",
+                degrees,
+                time.time() - t0,
+                gs1,
+            )
+            return
+
+        rb = self._angle_from_eu(pos)
+        self._degrees = rb
+        logger.info(
+            "ell14k.move_to.readback po_eu=%08X rb_deg=%.9f elapsed=%.3fs status_after=%r",
+            pos,
+            rb,
+            time.time() - t0,
+            gs1,
+        )
+
+    @property
+    def velocity_percent(self) -> int:
+        reps = self._cmd(f"{self.addr_hex}gv")
+        if not reps:
+            msg = "ELL14K velocity query timed out (no reply to gv)"
+            raise RuntimeError(msg)
+        rep = reps[0]
+        idx = rep.find("GV")
+        if idx < 0 or len(rep) < idx + 4:
+            msg = f"Bad GV reply: {rep!r}"
+            raise RuntimeError(msg)
+        hex_val = rep[idx + 2 : idx + 4]
+        try:
+            val = int(hex_val, 16)
+        except ValueError as exc:
+            msg = f"Bad GV value {hex_val!r} in reply {rep!r}"
+            raise RuntimeError(msg) from exc
+        if not (0 <= val <= 100):  # noqa: PLR2004
+            logger.warning("ell14k.velocity_percent.readback_out_of_range val=%d rep=%r", val, rep)
+        return val
+
+    @velocity_percent.setter
+    def velocity_percent(self, percent: int) -> None:
+        if not isinstance(percent, int):
+            msg = "velocity_percent must be an int in [0, 100]"
+            raise TypeError(msg)
+        if not (0 <= percent <= 100):  # noqa: PLR2004
+            msg = "velocity_percent must be in [0, 100]"
+            raise ValueError(msg)
+        cmd = f"{self.addr_hex}sv{percent:02X}"
+        t0 = time.time()
+        self._send(cmd)
+        logger.info("ell14k.set_velocity tx=%s percent=%d", cmd, percent)
+        try:
+            rb = self.velocity_percent
+        except RuntimeError as exc:
+            logger.warning("ell14k.set_velocity.readback_failed err=%r", exc)
+            return
+        logger.info(
+            "ell14k.set_velocity.readback percent_rb=%d elapsed=%.3fs",
+            rb,
+            time.time() - t0,
+        )
+
+    def _angle_from_eu(self, eu: int) -> float:
+        eu_full_rev = int(self._ENCODER_UNITS_PER_DEGREE * 360.0)
+        deg = ((eu % eu_full_rev) / float(self._ENCODER_UNITS_PER_DEGREE)) % 360.0
+        return (deg - self.offset_degrees) % 360.0
+
+    def _open_port(self) -> None:
+        logger.info("ell14k.start port=%s req_addr=%s timeout=%.2f", self.hw_address, self.addr_hex, self.timeout_s)
+        self._conn = serial.Serial(
+            self.hw_address,
+            baudrate=9600,
+            bytesize=serial.EIGHTBITS,
+            parity=serial.PARITY_NONE,
+            stopbits=serial.STOPBITS_ONE,
+            timeout=self.timeout_s,
+            write_timeout=self.timeout_s,
+            rtscts=False,
+            dsrdtr=False,
+            xonxoff=False,
+        )
+        self._conn.reset_input_buffer()
+        self._conn.reset_output_buffer()
+        self._send("")
+        self._drain_reads(0.05)
+
+    def _identify(self) -> tuple[dict[str, str], str]:
+        addrs = [self.addr_hex.upper()] + [a for a in "0123456789ABCDEF" if a != self.addr_hex.upper()]
+        ok_addr: str | None = None
+        parsed: dict[str, str] | None = None
+        for attempt in range(1, self.handshake_retries + 1):
+            for a in addrs:
+                self._drain_reads(0.01)
+                t0 = time.time()
+                self._send(f"{a}in")
+                line = self._readline_ascii()
+                dt = time.time() - t0
+                logger.info(
+                    "ell14k.in attempt=%d addr=%s rx=%r latency=%.3fs in_wait=%d",
+                    attempt,
+                    a,
+                    line,
+                    dt,
+                    int(self._conn.in_waiting),
+                )
+                if not line or not line.startswith(f"{a}IN"):
+                    continue
+                try:
+                    parsed = self._parse_in(line)
+                except ValueError:
+                    logger.exception("ell14k.in.parse addr=%s line=%r", a, line)
+                    continue
+                ok_addr = a
+                break
+            if ok_addr:
+                break
+            self._send("")
+            self._drain_reads(0.05)
+        if not ok_addr or not parsed:
+            logger.error("ell14k.start.identify_failed")
+            msg = "ELL14K identify timed out"
+            raise RuntimeError(msg)
+        return parsed, ok_addr
+
+    def _init_scale(self, parsed: dict[str, str]) -> None:
+        travel_hex = parsed.get("travel_hex")
+        self._travel_deg = int(travel_hex, 16) if travel_hex else 360
+        ppu_hex = parsed.get("pulses_per_unit_hex", "00000000")
+        pulses_val = int(ppu_hex, 16) if ppu_hex else 0
+        if self._travel_deg > 0 and pulses_val > 0:
+            self._ENCODER_UNITS_PER_DEGREE = float(pulses_val) / float(self._travel_deg)
+        else:
+            self._ENCODER_UNITS_PER_DEGREE = 262144.0 / 360.0
+        logger.info(
+            "ell14k.scale addr=%s travel_deg=%d pulses_hex=%s pulses_val=%d ENCODER_UNITS_PER_DEGREE=%.9f",
+            self.addr_hex,
+            self._travel_deg,
+            ppu_hex,
+            pulses_val,
+            self._ENCODER_UNITS_PER_DEGREE,
+        )
+
+    def _maybe_home(self) -> None:
+        if not self.home_on_start:
+            return
+
+        cur_deg = self.degrees % 360.0
+        cw_dist = (360.0 - cur_deg) % 360.0
+        ccw_dist = cur_deg
+        dir_code = "0" if cw_dist <= ccw_dist else "1"
+
+        cmd = f"{self.addr_hex}ho{dir_code}"
+        t0 = time.time()
+        self._send(cmd)
+        logger.info("ell14k.home cmd=%s cur_deg=%.9f cw_dist=%.9f ccw_dist=%.9f", cmd, cur_deg, cw_dist, ccw_dist)
+        self._wait_for_completion()
+        logger.info("ell14k.home.done elapsed=%.3fs", time.time() - t0)
+        self._sync_angle()
+
+    def _sync_angle(self) -> None:
+        pos_eu = self._get_position_eu()
+        if pos_eu is not None:
+            self._degrees = self._angle_from_eu(pos_eu)
+        else:
+            self._degrees = 0.0
+        gs_after = self._get_status()
+        logger.info("ell14k.start.sync degrees=%.9f status_after=%r", self._degrees, gs_after)
+
+    def _send(self, payload: str) -> None:
+        tx = (payload + "\r").encode("ascii")
+        n = self._conn.write(tx)
+        logger.debug("ell14k.tx bytes=%d data=%r", n, tx)
+
+    def _readline_ascii(self) -> str | None:
+        raw = self._conn.readline()
+        if not raw:
+            return None
+        s = raw.decode("ascii", errors="ignore").strip("\r\n")
+        logger.debug("ell14k.rx line=%r", s)
+        return str(s)
+
+    def _cmd(self, cmd: str) -> list[str]:
+        self._send(cmd)
+        lines: list[str] = []
+        t0 = time.time()
+        while time.time() - t0 < self.timeout_s:
+            line = self._readline_ascii()
+            if not line:
+                break
+            lines.append(line)
+            if self._conn.in_waiting == 0:
+                break
+        logger.debug("ell14k.cmd tx=%r rx_lines=%r", cmd, lines)
+        return lines
+
+    def _drain_reads(self, duration_s: float) -> None:
+        t0 = time.time()
+        total = 0
+        while time.time() - t0 < duration_s:
+            n = int(self._conn.in_waiting)
+            if n <= 0:
+                time.sleep(self._DRAIN_SLEEP_S)
+                continue
+            _ = self._conn.read(n)
+            total += n
+        if total:
+            logger.debug("ell14k.drain bytes=%d", total)
+
+    def _parse_in(self, line: str) -> dict[str, str]:
+        if "," in line:
+            parts = line.split(",")
+            return {
+                "ell": parts[2],
+                "sn": parts[3],
+                "year": parts[4],
+                "fw": parts[5],
+                "hw": parts[6],
+                "travel_hex": parts[7],
+                "pulses_per_unit_hex": parts[8],
+            }
+        data = line[3:]
+        return {
+            "ell": data[0:2],
+            "sn": data[2:10],
+            "year": data[10:14],
+            "fw": data[14:16],
+            "hw": data[16:18],
+            "travel_hex": data[18:22],
+            "pulses_per_unit_hex": data[22:30],
+        }
+
+    def _get_position_eu(self) -> int | None:
+        reps = self._cmd(f"{self.addr_hex}gp")
+        if not reps:
+            logger.debug("ell14k.gp no_reply")
+            return None
+        rep = reps[0]
+        idx = rep.find("PO")
+        if idx < 0 or len(rep) < idx + 10:
+            logger.debug("ell14k.gp bad_line=%r", rep)
+            return None
+        try:
+            val = int(rep[idx + 2 : idx + 10], 16)
+        except ValueError as exc:
+            logger.debug("ell14k.gp parse_error line=%r err=%r", rep, exc)
+            return None
+        else:
+            logger.debug("ell14k.gp po=%08X line=%r", val, rep)
+            return val
+
+    def _get_status(self) -> dict[str, str] | None:
+        reps = self._cmd(f"{self.addr_hex}gs")
+        if not reps:
+            return None
+        return {"raw": reps[0]}
+
+    def _wait_for_completion(self) -> None:
+        t0 = time.time()
+        last_po: int | None = None
+        last_gs: str | None = None
+        while time.time() - t0 < self._WAIT_TIMEOUT_S:
+            reps = self._cmd(f"{self.addr_hex}gp")
+            if reps:
+                rep = reps[0]
+                if "PO" in rep:
+                    try:
+                        pos_start = rep.find("PO") + 2
+                        cur = int(rep[pos_start : pos_start + 8], 16)
+                    except ValueError as exc:
+                        logger.debug("ell14k.wait parse_error line=%r err=%r", rep, exc)
+                    else:
+                        if last_po is not None and cur == last_po:
+                            logger.debug("ell14k.wait stable_po=%08X", cur)
+                            return
+                        last_po = cur
+            gs = self._get_status()
+            if gs and gs.get("raw") != last_gs:
+                last_gs = gs.get("raw")
+                logger.debug("ell14k.wait status=%r", last_gs)
+            time.sleep(0.05)
+        logger.warning("ell14k.wait timeout")