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No. 355	SMG-5400 Normal Firmware [v2.3.1_p4]	2020-08-24

Version v2.3.1_p4 Date 2020-08-21 Changes 1. supports multi-connection => TCP communication mode is automatically selected according to the "query flow" option. 2. improve status 3. change MTX/MRX LED operations \| blink with raw tcp TX/RX instead Modbus/TCP TX/RX 4. discards invalid modbus frame \| strengthened frame check

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