Device: Xiaomi - LYWSD03MMC (#3966)

Co-authored-by: ibratos <85811058+ibratos@users.noreply.github.com>

Author: github-actions[bot]

library/library.json

@@ -10808,6 +10808,12 @@
             "manufacturer": "ZVIDAR",
             "model": "Z-CM-V01",
             "battery_type": "Rechargeable"
+        },
+        {
+            "manufacturer": "Xiaomi",
+            "model": "LYWSD03MMC",
+            "hw_version": "BTHome v2",
+            "battery_type": "CR2032"
         }
     ]
 }