diff --git a/custom_components/ble_monitor/ble_parser/xiaomi.py b/custom_components/ble_monitor/ble_parser/xiaomi.py
index 4023ccb20..d257f82a8 100755
--- a/custom_components/ble_monitor/ble_parser/xiaomi.py
+++ b/custom_components/ble_monitor/ble_parser/xiaomi.py
@@ -74,6 +74,7 @@
     0x20DB: "MJZNZ018H",
     0x18E3: "ZX1",
     0x11C2: "SV40",
+    0x3F0F: "RS1BB",
 }
 
 # Structured objects for data conversions
@@ -721,6 +722,12 @@ def obj4805(xobj):
     return {"illuminance": illu}
 
 
+def obj4806(xobj):
+    """Moisture detected (wet/dry)"""
+    wet = xobj[0]
+    return {"moisture detected": wet}
+
+
 def obj4810(xobj):
     """Sleep State"""
     sleep_state = xobj[0]
@@ -1052,6 +1059,7 @@ def obj5a16(xobj):
     0x4803: obj4803,
     0x4804: obj4804,
     0x4805: obj4805,
+    0x4806: obj4806,
     0x4810: obj4810,
     0x4811: obj4811,
     0x4818: obj4818,
diff --git a/custom_components/ble_monitor/const.py b/custom_components/ble_monitor/const.py
index be9f64d95..7418b2591 100755
--- a/custom_components/ble_monitor/const.py
+++ b/custom_components/ble_monitor/const.py
@@ -1950,6 +1950,7 @@ class BLEMonitorBinarySensorEntityDescription(
     'Tilt Pink'               : 'Tilt',
     'MMC-W505'                : 'Xiaomi',
     'SJWS01LM'                : 'Xiaomi',
+    'RS1BB'                   : 'Linptech',
 }
 
 
diff --git a/custom_components/ble_monitor/manifest.json b/custom_components/ble_monitor/manifest.json
index 12f0eaa3b..7bedaa54b 100644
--- a/custom_components/ble_monitor/manifest.json
+++ b/custom_components/ble_monitor/manifest.json
@@ -14,5 +14,5 @@
     "btsocket>=0.2.0",
     "pyric>=0.1.6.3"
   ],
-  "version": "12.8.2"
+  "version": "12.9.0"
 }
diff --git a/custom_components/ble_monitor/test/test_xiaomi_parser.py b/custom_components/ble_monitor/test/test_xiaomi_parser.py
index c2a0a3dc2..bf0c86e57 100644
--- a/custom_components/ble_monitor/test/test_xiaomi_parser.py
+++ b/custom_components/ble_monitor/test/test_xiaomi_parser.py
@@ -340,6 +340,32 @@ def test_Xiaomi_SJWS01LM(self):
         assert sensor_msg["moisture detected"]
         assert sensor_msg["rssi"] == -88
 
+    def test_Xiaomi_RS1BB(self):
+        """Test Xiaomi parser for LINP-RS1BB."""
+        self.aeskeys = {}
+        data_string = "043E2902010000674cb938c1a41d020106191695fe58590F3F4A674CB938C1A4D6E57B83040000D01E0B4BC0"
+        data = bytes(bytearray.fromhex(data_string))
+
+        aeskey = "33ede53321bc73c790a8daae4581f3d5"
+
+        is_ext_packet = True if data[3] == 0x0D else False
+        mac = (data[8 if is_ext_packet else 7:14 if is_ext_packet else 13])[::-1]
+        mac_address = mac.hex()
+        p_mac = bytes.fromhex(mac_address.replace(":", "").lower())
+        p_key = bytes.fromhex(aeskey.lower())
+        self.aeskeys[p_mac] = p_key
+        # pylint: disable=unused-variable
+        ble_parser = BleParser(aeskeys=self.aeskeys)
+        sensor_msg, tracker_msg = ble_parser.parse_raw_data(data)
+
+        assert sensor_msg["firmware"] == "Xiaomi (MiBeacon V5 encrypted)"
+        assert sensor_msg["type"] == "RS1BB"
+        assert sensor_msg["mac"] == "A4C138B94C67"
+        assert sensor_msg["packet"] == 74
+        assert sensor_msg["data"]
+        assert sensor_msg["moisture detected"] == 0
+        assert sensor_msg["rssi"] == -64
+
     def test_Xiaomi_MJYD02YL(self):
         """Test Xiaomi parser for MJYD02YL."""
 
diff --git a/docs/_devices/RS1BB.md b/docs/_devices/RS1BB.md
new file mode 100644
index 000000000..6fbc6049a
--- /dev/null
+++ b/docs/_devices/RS1BB.md
@@ -0,0 +1,16 @@
+---
+manufacturer: Linptech
+name: Water Immersion and Rainwater sensor
+model: RS1BB
+image: RS1BB.png
+physical_description:
+broadcasted_properties:
+  - moisture detected
+  - rssi
+broadcasted_property_notes:
+broadcast_rate:
+active_scan:
+encryption_key: true
+custom_firmware:
+notes:
+---
diff --git a/docs/_devices/SJWS01LM.md b/docs/_devices/SJWS01LM.md
index 551d415a0..2a2b079c0 100644
--- a/docs/_devices/SJWS01LM.md
+++ b/docs/_devices/SJWS01LM.md
@@ -5,7 +5,7 @@ model: SJWS01LM
 image: SJWS01LM.png
 physical_description:
 broadcasted_properties:
-  - moisture
+  - moisture detected
   - button
   - battery
   - rssi
diff --git a/docs/assets/images/RS1BB.png b/docs/assets/images/RS1BB.png
new file mode 100644
index 000000000..390a912e8
Binary files /dev/null and b/docs/assets/images/RS1BB.png differ