I have 4 microcontrollers that are to be networked with wire length of abt. a thousand feet.
I just want to ask can it be done with RS232C interface? or I shud it be done with RS485?
It could be done with RS232 if you really want it, but with RS485 will be much easy. With RS232 you need an addressable daisy chain scheme with an RS232 transciever and two RS232 connectors on every board.
You can use the serial communication port implemented in th uC units and use the SN75176 chip from national semiconductors as an RS485 transceiver. this approach can cover up to 1200 m (witn a maximum of 300 bps).
Hi
Look the distance of communication for rs232 is dependent of baud rate
the for example you can communicat at 9600 for about 100m,and at 2400 may be
around 300m
if you need more than this distance you must chang to rs485
I have 4 microcontrollers that are to be networked with wire length of abt. a thousand feet.
I just want to ask can it be done with RS232C interface? or I shud it be done with RS485?