Serial Connection

I want to connect tow Arduino Board By Serial (uart) The Question Is: What is The Max Cable Length can i use To Connect The Boards Together By Serial (Uart)?

alloushi987: I want to connect tow Arduino Board By Serial (uart) The Question Is: What is The Max Cable Length can i use To Connect The Boards Together By Serial (Uart)?

Why don't you tell us what length you want to use? There are many factors that influence length. Baud rate, Shielding, Interference, to name a few.

Pretty darn long with the right buffer:
“RS-485 transmits digital information between multiple locations. Data rates can be up to, and sometimes
greater than, 10Mbps. RS-485 is designed to transmit this information over significant lengths, and 1000
meters are well within its capability. The distance and the data rate with which RS-485 can be
successfully used depend a great deal on the wiring of the system.”

MAXIM AN763 Guidelines for RS485 wiring.pdf (247 KB)

i want cable length about 100 Meter