Module TXD serial port RXD, Module RXD serial TXD, VCC 3.3V 5V must be burned, is the current increases, the phenomenon is chip fever) VCC 3.3V 5V must be burned, is the current increase, chip fever)Using the PC software can easily get the error status of the module, such as measuring distance too tight, measured movements too quickly, or there is no reflection, reflection, such as various error messages,Objects blocking the or lens, you can simulate the fourth error. On the front of the module, one or two centimetres in the block, you can simulate the first error, As long as the module can return data, response data, indicates the module is OK, Range when operating current, 120mAIf the is not working failureAvalanche driver 110V, if the receiver part of the bad, you are prompted to receive failureCurrently both a hard error, if no data is mostly lines connection problem or software problem, you can try to resetMeasuring range: 0.05-40 m Measurement accuracy (standard deviation): 2.mm (10 m) greater than 10 m formula 2+0.05* (D-10), and d is the distanceDistance unit: m type: 620-690nm class: class , Less than 1mW (B-level security)Single measurement time: 0.25-1S(4HZ)Spot diameter at the distance m: 6mm@10m,30mm@50Operating temperature: -10~+60 cStorage temperature: -20~+80 c supply voltage: DC3v-3.3vIO Voltage:TTL Level compatible 3v-5v VoltageIn harsh environments such as:Sunlight is too strong,Ambient temperature fluctuations are too big,Relatively weak reflector,System voltage high/low,Measuring distance is near,The result could be greater errors,Recommended to use with the target in this case reflectorModules use the prohibition beyond the marked electrical range,Does not meet the required supply voltage can damage module,5v IO Directly setto drive,If AVR Or STC Single-chip microcomputer,List of series 1K Ohm resistor.Material: plasticcolour: blackPackage Contents:1 x Sensor Range Finder ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.