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Uart ttl rs485
UART TTL to RS485 Two-way Converter Module [TTL-RS485-Module] - US $2. ...
![UART TTL to RS485 Two-way Converter Module [TTL-RS485-Module] - US $2. ...](http://www.haoyuelectronics.com/Attachment/TTL-RS485-Module/TTL-RS485-Module-5.jpg)