Lame question (really fast answer need)

Is there difference between serial cable and Null Modem Serial cable?

no

null-modem is like crossover: it has transmitter on one side connected to receiver on the other

I’ve bought one Serial cable:
pin1-pin1; pin2-pin2 … and etc.
And I had to resolder it :slight_smile:. But I didn’t understand why it doesn’t work, until I found the answer in documentation :slight_smile:.