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Level conversion microcontroller TTL to RS485 module/485 to serial UART module microcontroller automatic flow control -62406
2pcs XY-017 UART Serial Port to RS485 Board Module RS485 to TTL Converter Module 10Pcs/1pc TTL To RS485 Module Hrdwre utomtic Flow Control Module Seril URT Level Mutul Conversion Power Supply 3.3V/5V
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