It is possible to have multiple software serial ports with different speed?
like this...
Softwareserial mygsm(10,11)
Softwareserial myhc(45,46)
mygsm.begin(9600)
myhc.begin(34800)
You have 4 hardware serial ports on the Mega 2560. It's unlikely you need to use software serial. You should always use hardware serial over software serial when possible. See: