diff --git a/batch_store.py b/batch_store.py
index f2dfc2e..cfb6cbe 100644
--- a/batch_store.py
+++ b/batch_store.py
@@ -3,12 +3,16 @@ Production batch persistence for edge Jetson counter.
 Mirrors frigate-counter SQLite schema + current_batch.json contract.
 """
 import json
+import os
 import sqlite3
 import threading
 import time
 from datetime import datetime, timedelta
 from pathlib import Path
 
+_SHMD = os.getenv("SHM_DIR", "/dev/shm/bytetrack-counter")
+_RESET_FLAG = Path(f"{_SHMD}/.reset")
+
 
 class BatchStore:
     def __init__(
@@ -195,9 +199,8 @@ class BatchStore:
         self.log('Ignore batch label cooldown finished')
 
     def _check_reset_signal(self):
-        reset_file = Path(str(self.state_file) + ".reset")
-        if reset_file.exists():
-            reset_file.unlink(missing_ok=True)
+        if _RESET_FLAG.exists():
+            _RESET_FLAG.unlink(missing_ok=True)
             if self.current_state is not None:
                 self.log("External reset signal — clearing in-memory state")
                 self.current_state = None
diff --git a/config.env.example b/config.env.example
index 94fd412..c0a673c 100644
--- a/config.env.example
+++ b/config.env.example
@@ -11,6 +11,8 @@ OUTPUT_DIR=/opt/bytetrack-counter
 DB_PATH=/opt/bytetrack-counter/bytetrack_counter.db
 # JSON file persisting the current active batch state
 STATE_FILE=/tmp/bytetrack_current_batch.json
+# Shared memory directory used for reset signal (touch .reset to clear counter state)
+SHM_DIR=/dev/shm/bytetrack-counter
 
 # --- Input source ---
 # RTSP / HTTP live stream, or a local video file path
diff --git a/counter_dashboard.py b/counter_dashboard.py
index 00dc923..5336f09 100644
--- a/counter_dashboard.py
+++ b/counter_dashboard.py
@@ -31,6 +31,7 @@ CURRENT_BATCH_PATH = os.getenv("STATE_FILE", os.getenv("CURRENT_BATCH_PATH", f"{
 CUTOFF_TIME = os.getenv("CUTOFF_TIME", os.getenv("DAILY_CUTOFF_TIME", "20:00"))
 
 LIVE_STREAM_FRAME_PATH = os.getenv("LIVE_STREAM_FRAME_PATH", "/dev/shm/jetson-counter/live_frame.jpg")
+SHM_DIR = os.getenv("SHM_DIR", "/dev/shm/bytetrack-counter")
 
 SITE_NAME = os.getenv("SITE_NAME", "LIVE")
 
@@ -560,8 +561,9 @@ def api_reset():
             paths.add(cb)
         for p in paths:
             Path(p).unlink(missing_ok=True)
-            Path(str(p) + ".reset").touch()
         Path(LIVE_STREAM_FRAME_PATH).unlink(missing_ok=True)
+        Path(SHM_DIR).mkdir(parents=True, exist_ok=True)
+        Path(f"{SHM_DIR}/.reset").touch()
     except Exception:
         pass
     return jsonify({"success": True, "message": "State + live frame cleared"})