Hello, I need to use 2 serials on arduino UNO. However UNO has only one hardware serial, so I will use 2 pins for another serial (the software serial). My question is: Will I have reliable results on the UNO or should I "go" to Arduino MEGA 2560 which has more hard serials, so everything is ok?
I have used software serial many times with an Uno taking to different modules. As long as the distance is short (3-4 ft max) and the baud rate 38400 or less I have no trouble. There are other (better?) software serial libraries available. A search will find them.
If you want faster speed than 38400 a Mega would be the way to go.