RS232 with UART (by Evan Raftery)
Is it feasible to use UART to communicate with RS232 on PLC?
Would comms have to be via a level shifter like max232?
Alternatively are there RS485 chips that will work in conjunction with LD Micro via its UART?
Can you recommend a digital potentiometer which will work with PICs and LDmicro.
(no subject) (by Jonathan Westhues)
Yes, and RS-232 does require a level-shifter (like the MAX232 or equivalent). There's also a MAX485, that does RS-485 levels.