... project usage with industrial performance. 2,Product principleUltrasonic ranging module BLJ-ME007Y provides 30cm - 300cm non-contact measurement function, the ... Breadboard friendly Dual transducerArduino library ready 5,Sequence chart The BLJ-ME007Y Timing diagram is shown below. You only need ... or anything else. If nothing is detected then the BLJ-ME007Y will lower its echo line anyway after about 36mS ...