rplidar_arduino
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Can I use the SoftwareSerial rather than HardwareSerials ?
my hardware serial pin 0 and 1 have already been used,so what can I do to use the software serial?
I would try editing the driver so that a SoftwareSerial object is passed in for the serial object defined in RPLidar.cpp and RPLidar.h instead of HardwareSerial. You might need to make a few changes elsewhere too.