["brand new and high quality.\r\n\r\nFeatures:\r\nJSN-SR0T4-2.0 ultrasonic distance measuring module can provide 20cm-600cm non-contact distance sensing function, ranging accuracy up to 2mm.\r\nModule includes transceiver ultrasonic sensor and control circuit, it is a piezoelectric sensor made using electrostrictive phenomena.\r\nThis product uses industrial-grade integrated ultrasonic probe design, a certain degree of waterproof (but can not be immersed in water), stable performance, for all MCU work on the market.\r\nSmall size, easy to use.\r\nWide power supply range, low power consumption.\r\nHigh measurement accuracy, high resolution.\r\nThe detection of blind area is small, farther away.\r\nOutput diversification, pulse width output, serial output.\r\n\r\nProduct parameters:\r\nOperating voltage: for DC 3.0~5.5V\r\nOperating current: less than 8mA\r\nProbe frequency: 40kHz\r\nLong range up to: 600cm\r\nNear range: 20cm\r\nDistance accuracy: ±1cm\r\nMeasuring angle: 75 degrees\r\nInput trigger signal:\r\n1. TTL pulse above 10uS\r\n2. Serial transmission instructions 0X55\r\nOutput reverb signal: output pulse width level signal, or TTL\r\nWiring:\r\n3-5.5V (power positive)\r\nTrig (control) RX\r\nfor Echo (output) TX\r\nGND (power negative)\r\nWorking temperature: -20~70℃\r\nSize: 4.1cm/1.61\"×2.8cm/1.10\"\r\nLine length: about 2.5m/98.43\"\r\n\r\nThe default working mode is Mode 1.\r\nMode 1: R27 = open that is not welding. The pattern is described below\r\nBasic working principle:\r\nUsing IO port TRIG trigger range, to a minimum of 10us high letter.\r\nModule automatically send 8 40khz square wave, automatically detect whether the signal back;\r\nThere is a signal to return, through the IO port for ECHO output a high level, the high level of continuous for time is the ultrasound\r\nFrom the for time of for launch to return. Test distance = (high for time * sound velocity (340M / s)) / 2;\r\nWhen the module is triggered, if no for echo is received (the reason is more than the measured range or the probe is not positive On the measured object),\r\nfor ECHO port will automatically become low after 60MS, marking the end of the measurement, regardless Power or not.\r\nLED indicator, LED non-power indicator, it will receive the trigger signal after the module, this When the module is in working condition.\r\nOnly need to provide a pulse above 10uS trigger signal, the module will be issued within 8 40kHz cycle levels and detect for echo. The for echo signal is output once an for echo signal is detected. Reverberations\r\nThe pulse width of the pulse is proportional to the measured distance. Thereby by transmitting a signal to the received for echo signal for time interval\r\nCan calculate the distance. Formula: uS / 58 = for cm or uS / 148 = inches; or: distance = high for time *Sound speed (340M / S) / 2;\r\nThe recommended measurement period is 60ms or more to prevent the impact of the transmitted signal on the for echo signal.\r\n \r\nMode 2: R27 = 47K is the welding 47K resistance. The pattern is described below\r\nSerial output format for the TTL level, that: 100MS module for the cycle of automatic transmission\r\nThe value of the distance, in mm. Serial baud rate: 9600, n, 8,1.\r\nModule power recognition, directly into the work mode, the module to conduct a distance every 100ms range,\r\nAnd outputs one frame from the pin TX with four 8-bit data. The frame format is: 0XFF + H_DATA + L_DATA + SUM\r\n \r\n1.0XFF: for a frame to start the data, used to judge;\r\n2.H_DATA: the upper 8 bits of the distance data;\r\n3.L_DATA: the lower 8 bits of the distance data;\r\n4.SUM: data and, for the effect of its 0XFF + H_DATA + L_DATA = SUM (only low 8)\r\n \r\nNote: H_DATA and L_DATA synthesize 16-bit data, that is, the distance in millimeters.\r\n \r\nDescription: The module outputs the nearest distance value in the dead zone. If the module does not measure data or is out of range Measured output 0.\r\nLED indicator, LED non-power indicator, the module connected to work after the light, then the module is in Working state.\r\n \r\nMode 3: R27 = 120K is the welding 120K resistance. In the serial port mode\r\nModule power recognition, the module into the standby state, the serial output format for the TTL level, the serial port baud rate:\r\n9600, n, 8, 1. When the RX port receives the 0X55 instruction, the module starts a ranging and outputs from the pin TXOut of a frame with 4 8-bit data.\r\n \r\nThe frame format is: 0XFF + H_DATA + L_DATA + SUM\r\n1.0XFF: for a frame to start the data, used to judge;\r\n2.H_DATA: the upper 8 bits of the distance data;\r\n3.L_DATA: the lower 8 bits of the distance data;\r\n4.SUM: data and, for the effect of its 0XFF + H_DATA + L_DATA = SUM (only low 8)\r\n \r\nNote: H_DATA and L_DATA synthesize 16-bit data, that is, the distance in millimeters\r\n \r\nDescription: The module outputs the nearest distance value in the dead zone. If the module does not measure data or is out of