US sensor on UART serial communication issue

Dear all,

I have an issue using the A01NYUB US distance sensor. It communicates via UART with my arduino and I can print the serial output ('value' var). There is only one problem (see handle() function at the bottom), when I try to evaluate the float (value variable I pass to this function), and print a warning text to serial monitor, always the same integer ('11822') is printed instead of the warning message... (screenshot of serial monitor output attached)

Below is the modified code example I got from dfrobot.com:

/*
  *@File  : DFRobot_Distance_A01.ino 
  *@Brief : This example use A01NYUB ultrasonic sensor to measure distance
  *         With initialization completed, We can get distance value 
  *@Copyright [DFRobot](https://www.dfrobot.com),2016         
  *           GUN Lesser General Pulic License
  *@version V1.0           
  *@data  2019-8-28
*/

#include <SoftwareSerial.h>

SoftwareSerial mySerial(11,10); // RX, TX
unsigned char data[4]={};
float value;
float distance;

void setup()
{
  Serial.begin(57600);
  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])
    {
      value=(data[1]<<8)+data[2];
      handle(value);
    }
    else
    {
      Serial.println("ERROR");
    }
  }
  delay(150);

}

char handle(float value)
{
  if(value>280)
  {
   distance = value/10;
   
   Serial.print(distance);
   Serial.println("cm");
   
   if(distance<30)
   {
    Serial.println('High water');
   }
   else if(distance>=30 and distance<40)
   {
    Serial.println('Water is rising, attention!');
   }
   else
   {
    Serial.println('All Safe...');
   }
   
  }
  else 
  {
    Serial.println("Below the lower limit");        
  }
}

screenshot_serial.png

Many thanks in advance for your help!

screenshot_serial.png

Serial.println('High water');Oops

MANYthanks, TheMemberFormerlyKnownAsAWOL!

I got it: should have used double quotes! :confused:

Have a nice day!

Zeff