A01NYUB Waterproof Ultrasonic Distance Sensor

Most ultrasound distance sensors are not waterproof, which can pose a problem if you want to use the sensor outdoors or in a damp environment, for example, in a water tank to measure the water level. DFRobot has a reliable ultrasound distance sensor with a waterproof emitter specifically for this application. This sensor is suitable for outdoor applications such as reversing sensors, security alarms, industrial inspections, level monitoring, water level monitoring in water tanks, etc. This waterproof ultrasound sensor A01NYUB offers you a large monitoring distance of 0.28m to 7m. The sensor features a closed transmitter and receiver that are waterproof and dustproof. The signal processing unit is integrated into the sensor module, so you can read out the distance value directly via the asynchronous serial interface. With a band rate of 9600Bit/s, the sensor can communicate with the microcontroller, significantly shortening development time for the user.

Documentation:

• DFRobot Wiki

Technical Details:

• Type: A01NYUB
• Interface Communication: UART 
• Response Time: 100ms
• Operating Voltage: 3.3 to 5.5V DC
• Average Current Consumption: <15ma
• Detection Range (flat object): 28-750cm
• Resolution: 1mm
• Sampling Angle:  55°
• Operating Temperature: -25 to 80°C
• Protection Rating: IP67
• Cable Length: 320mm
• Weight: 42g

Scope of Delivery:

• 1x A01NYUB Waterproof Ultrasound Distance Sensor
• 1x Adapter Cable PH2.0-4P to 2.5mm 4p Plug

// Example with a Wemos D1 (Alf 2020)
// The connections are created on the software side.

#include 

#define mess_TX D1 // Enter your connection for the blue cable here
#define mess_RX D2 // Enter your connection for the green cable here


SoftwareSerial mySerial(mess_RX,mess_TX); // RX, TX
unsigned char data[4]={};
float distance;

void setup()
{
 Serial.begin(115200);
 mySerial.begin(9600); 
}

void loop()
{
    do{
     for(int i=0;i<4;i++)
     {
       data[i]=mySerial.read();
     }
  }while(mySerial.read()==0xff);

  mySerial.flush();

  if(data[0]==0xff)
    {
      int sum;
      sum=(data[0]+data[1]+data[2])&0x00FF;
      if(sum==data[3])
      {
        distance=(data[1]<<8)+data[2];
        if(distance>280)
          {
           Serial.print("distance=");
           Serial.print(distance/10);
           Serial.println("cm");
          }else 
              {
                Serial.println("Below the lower limit");        
              }
      }else Serial.println("ERROR");
     }
     delay(150);
}