As others have said, RS232 is the actually physical connection, with it's +/-12V swing - the protocol you're using is just standard serial, something like 9600N1 (depending exactly what you're using).Its not really anything..... RS232 seems to be the best protocol... so I created a 6mA current loop for the transfer.... 5v connection
Its my hy-brid but the protocol is definitely RS232
exactly!! :dnigel... I have always seen rs323 as a protocol.... Protocol is language communication.. I saw the hardware... -12/12 volt level shifting as an aide for this protocol.
I may have misunderstood
hang on.... Thinking about it... Why else would the chip be an rs232 converter...