Measuring Frequency: 5HZ,10HZ,20HZ(Adjustable); Measurable velocity of moving objects:less 2m/s ADDR Device Address. Postion is 1, count from the top , when item is 0, count from ( 04 08 01 F9),The default setting is from end check byte, it sums all the bytes in front,Returns the reverse, plus 1, in the data returned by single measurements and successive measurements, in which the quotes are part of the data,Format is ASCII sample:123.456 m display 31 32 33 2E 34 35 36 ADDR Default value 80(128) NOTICE: If you need to get a higher frequency, you need to sacrifice the accuracy of the measurement. When set to 20hz (send 04 0A 14 E4), the accuracy in continuous measurement mode become +-4mm; if the frequency is set to the lowest frequency (send ) 04 0A 00 F8), the accuracy in continuous measurement mode be within 1mm. In single measurement mode (send 80 06 02 78), the accuracy is always within 1 mm. Remarks: Because the environment light intensity is too large, the ambient temperature is too high or too low, the reflector is too weak or too strong, or the target of a rough , different measurement objectives and measurement environment may cause some error of the measurement range or measurement results. Parameters:Power Supply Voltage:DC3V-3.3V Current:100mA Measuring Range:0.01-80m Measurement Accuracy(standard deviation):±1.mm Distance Unit:m Laser Type:620-690nm Laser Class:class II Baud rate:9600bps data bit:8 bit Start bit:1bit Stop Bit:1bit Parity:none The to read data when the parameter is factory setting:Single measurement:80 06 02 78 Continuous measurement:80 06 03 77 Shutdown device: 80 04 02 7A Set address: 04 01 80 81 Distance modification: 04 06 2D 01 CE -1 04 06 2B 01 D0 +1 time interval (1S): 04 05 01 FC Set start point: 04 08 01 F9 Top 04 08 00 back ends Set range:<br