RS-232

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• 

  STM32 NB IOT RS-232 Wireless Control Board, STM32L151 BC35G

  $17.10
  STM32 NB IOT RS-232 Wireless Control Board, STM32L151 BC35G quantity
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• 

  RS422-TTL Module, Full Duplex, RS-422

  $3.50
  RS422-TTL Module, Full Duplex, RS-422 quantity
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• 

  RS232 to RS485 Two Way Converter

  $3.10
  RS232 to RS485 Two Way Converter quantity
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