How many levels of handshake do you need in serial communication of a null modem?

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watertreader

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Hi,

Just a query. For Serial communication in a null modem configuration, how many level of handshake do you actually need?

Is it as follows:
For transmission side, you are supposed to send a DTR signal and wait for an DSR response. Then do you actually need to use the RTS and CTS pair if no modem is involved?


Thanks for your help!
 

Re: Serial Communication

Hi,

So only a RTS/CTS flow control is neccessary? I mean, we do not actually need to implement the DTR/DSR flow control?

THanks for your help!
 

Re: Serial Communication

no .. i dont think so
 
Re: Serial Communication


Here the pin connection in male/female RS232 9pin Dsub is shown .....
 

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