Add support for additional Xiaomi BLE sensors (#1027) (#1027)

esphome/config_validation.py

@@ -566,6 +566,23 @@ def mac_address(value):
     return core.MACAddress(*parts_int)
 
 
+def bind_key(value):
+    value = string_strict(value)
+    parts = [value[i:i+2] for i in range(0, len(value), 2)]
+    if len(parts) != 16:
+        raise Invalid("Bind key must consist of 16 hexadecimal numbers")
+    parts_int = []
+    if any(len(part) != 2 for part in parts):
+        raise Invalid("Bind key must be format XX")
+    for part in parts:
+        try:
+            parts_int.append(int(part, 16))
+        except ValueError:
+            raise Invalid("Bind key must be hex values from 00 to FF")
+
+    return ''.join(f'{part:02X}' for part in parts_int)
+
+
 def uuid(value):
     return Coerce(uuid_.UUID)(value)