===== UART RX =====

With RX command you can receive one or more bytes in HEX notation from external UART of Carberry.

==== Synopsis ====

  UART RX [<LEN>]
  
RX accepts an optional parameter indicating the maximum number of data bytes to read from UART.

==== Return ====

RX command returns one (or more) bytes in HEX notation read from UART, followed by a line containing OK.\\
If there are no bytes waiting for reading, the command returns only OK line.

==== Examples ====

Receiving some data bytes:

  UART RX
  00112233445566778899AABBCCDDEEFF
  OK
  
  UART RX
  OK
 
  
Receiving a maximum of eight characters at a time:

  UART RX 8
  0011223344556677
  OK
    
  UART RX 8
  8899AABBCCDDEEFF
  OK
  
  UART RX 8
  OK