Multiple I2C sensors and libraries using Arduino(s) on a Water Tank ( Wireless )

Projects Programming
9

I have found another UltraSonic with I2C here
The addresses are similar for the commanding the sensor to read.

Here is the same code for mine :

#include <Wire.h>

void setup() {
  
  Serial.begin (9600);
  Wire.begin();
  Wire.setClock(400000L);
}

int Range=0;

void loop() {
  // Step1: instruct sensor to read
  Wire.beginTransmission(112);
  Wire.write(byte(0x00));      // sets register pointer to the command register (0x00)
  Wire.write(byte(0x51));      

  Wire.endTransmission();      // stop transmitting

  // step2: for reading to happen 
  
  delay(200); 

 // step 3: instruct sensor to return a particular echo reading
  Wire.beginTransmission(112); // transmit to device #112
  Wire.write(byte(0x02));      // sets register pointer to echo #1 register (0x02)
  Wire.endTransmission();      // stop transmitting
  

// step 4: request reading from sensor
  Wire.requestFrom(112, 2);    

  
// step 5: receive reading from sensor
  if (2 <= Wire.available()) { // if two bytes were received
    Range = Wire.read();  // receive high byte (overwrites previous reading)
    Range = Range << 8;    // shift high byte to be high 8 bits
    Range |= Wire.read(); // receive low byte as lower 8 bits
    Serial.println(Range);   // print the reading
  }

  delay(250);                
}
  
}

Didn't change it, but my question is why he wrote the register pointers parts ?

These are my sensor commands ( try to open them on a new window for clearer image )


622×530 52 KB

So, do I need to do the register parts ?

I haven't got the chance to test it. Can I improve the code? and how to write for it to measure real-time as it suggest above ?