Firmware Release Notes SW01840-1.3.8.0 Supported products: R-KEY-MBUS (B0) Z-KEY-MBUS (D0) IMPORTANT: If you are updating from a version earlier than 1.3.5.0, you must back up the configuration before proceeding. After the update is complete, the configuration must be restored manually. NEW: -New: Web server with HTTPS -New: New Modbus TCP Secure protocol