AF_XPort::AF_XPort(uint8_t rx, uint8_t tx, uint8_t reset, uint8_t dtr, uint8_t rts, uint8_t cts)
: xportserial( rx, tx, false ) // <--- add
{
rxpin = rx;
txpin = tx;
// remove ---> xportserial = SoftwareSerial(rxpin, txpin, false);
resetpin = reset;
...
}