diff --git a/dashboard/__pycache__/sensit_decoder.cpython-314.pyc b/dashboard/__pycache__/sensit_decoder.cpython-314.pyc
new file mode 100644
index 0000000..6a733c9
Binary files /dev/null and b/dashboard/__pycache__/sensit_decoder.cpython-314.pyc differ
diff --git a/dashboard/sensit_decoder.py b/dashboard/sensit_decoder.py
index 067caf5..df29bad 100644
--- a/dashboard/sensit_decoder.py
+++ b/dashboard/sensit_decoder.py
@@ -98,18 +98,14 @@ def _decode_v2(b0: int, b1: int, b2: int, b3: int) -> dict:
         result["temperature_c"] = round((temp_raw - 200) / 8, 2)
         result["reed_switch"] = bool((b2 >> 6) & 0x01)
 
-    # Byte 3 depends on mode
-    if mode == 0:  # Button — software version
+    # Byte 3 depends on mode (per v2 spec)
+    if mode == 0:  # Button — software version (fw major.minor)
         result["fw_major"] = (b3 >> 4) & 0x0F
         result["fw_minor"] = b3 & 0x0F
-    elif mode == 1:  # Temperature — humidity
+    elif mode == 1:  # Temperature — humidity percentage
         result["humidity_pct"] = round(b3 * 0.5, 1)
-    elif mode == 4:  # Move — event count / status
-        result["move_events"] = b3
-    elif mode == 5:  # Reed Switch — event count
-        result["reed_events"] = b3
-    else:
-        result["byte3_raw"] = b3
+    else:  # Light, Door, Move, Reed Switch — number of alerts / events
+        result["event_count"] = b3
     return result
 
 
diff --git a/dashboard/static/index.html b/dashboard/static/index.html
index 6c35d06..247c95f 100644
--- a/dashboard/static/index.html
+++ b/dashboard/static/index.html
@@ -125,8 +125,6 @@ function summaryLine(d) {
   if ('vibration_status' in d) p.push(`vibration: ${d.vibration_status}`);
   if ('magnet_status' in d) p.push(`magnet: ${d.magnet_status}`);
   if ('event_count' in d && d.mode_id > 2) p.push(`${d.event_count} events`);
-  if ('move_events' in d) p.push(`${d.move_events} moves`);
-  if ('reed_events' in d) p.push(`${d.reed_events} reed events`);
   if ('fw_major' in d) p.push(`fw ${d.fw_major}.${d.fw_minor}`);
   if (p.length === 0) p.push('heartbeat');
   return p.join(' · ');
@@ -220,7 +218,7 @@ const chartPresets = {
   Move: {
     subtitle: 'Cumulative movement events',
     datasets: (msgs) => [
-      makeDs('Move events', msgs.map(m => m.decoded?.move_events ?? null), '#e11d48', 'y'),
+      makeDs('Event count', msgs.map(m => m.decoded?.event_count ?? null), '#e11d48', 'y'),
     ],
   },
   Magnet: {
@@ -232,7 +230,7 @@ const chartPresets = {
   'Reed Switch': {
     subtitle: 'Cumulative reed switch events',
     datasets: (msgs) => [
-      makeDs('Reed events', msgs.map(m => m.decoded?.reed_events ?? null), '#7c3aed', 'y'),
+      makeDs('Event count', msgs.map(m => m.decoded?.event_count ?? null), '#7c3aed', 'y'),
     ],
   },
 };