Wireless Distance Monitoring with Arduino Uno, TF-Luna LiDAR and XBee

This project uses the TF-Luna LiDAR sensor with an Arduino Uno to measure distance in real time. The Arduino reads distance data from the TF-Luna over i2C and processes the values. The measured distance is then transmitted wirelessly using the XBee S2C module. On the receiver side, another XBee module connected to a system (Arduino/PC) receives the transmitted data and displays or logs the distance. The setup provides a simple wireless distance monitoring system without the need for physical connections between the sensing and receiving units. It can be used for basic remote sensing, obstacle detection, or monitoring applications.

May 2, 2026

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MIT

Arduino User Group

Devices & Components

10 jumper wires 150mm male

Arduino Uno Rev3

TF-Luna LiDAR Sensor

XBee S2C Module

Software & Tools

Arduino IDE

Digi XCTU

Project description

Code

distance_xbee_01

cpp

1#include "SoftwareSerial.h"
2#include <Wire.h>
3
4byte deviceAddress = 0x10;  // The address of the TF-Luna device is 0x10
5SoftwareSerial XBee(2,3);
6void setup() {
7  Wire.begin();             // The I2C bus communication starts
8  Serial.begin(9600);
9   XBee.begin(9600);// Example Set the baud rate of the serial port to 115200
10}
11
12void loop() {
13  Wire.beginTransmission(deviceAddress);  // The I2C data transmission starts
14  Wire.write(0x00);                       // Send command
15  Wire.endTransmission();                 // The I2C data transfer is complete
16
17  Wire.requestFrom((uint8_t)deviceAddress, (uint8_t)7);     // Read 7 bytes of data 
18
19  if (Wire.available() == 7) {            // 7 bytes of data are available
20    byte data[7];
21    for (int i = 0; i < 7; i++) {
22      data[i] = Wire.read();              // Read data into an array
23    }
24
25    unsigned int distance = (data[1] << 8) | data[0];                   // DistanceValue
26    unsigned int signalStrength = (data[3] << 8) | data[2];             // signal strength
27
28    Serial.print("Distance: ");
29    Serial.print(distance);
30    Serial.print(" cm  \n");
31    int A = distance;
32    char distanceStr[10];
33        snprintf(distanceStr, sizeof(distanceStr), " D %d\n", A);
34
35    Serial.println(distanceStr);
36                
37    XBee.write(distanceStr);
38    delay(1000);
39  }
40
41                 
42}

#include "SoftwareSerial.h"
#include <Wire.h>

byte deviceAddress = 0x10;  // The address of the TF-Luna device is 0x10
SoftwareSerial XBee(2,3);
void setup() {
  Wire.begin();             // The I2C bus communication starts
  Serial.begin(9600);
   XBee.begin(9600);// Example Set the baud rate of the serial port to 115200
}

void loop() {
  Wire.beginTransmission(deviceAddress);  // The I2C data transmission starts
  Wire.write(0x00);                       // Send command
  Wire.endTransmission();                 // The I2C data transfer is complete

  Wire.requestFrom((uint8_t)deviceAddress, (uint8_t)7);     // Read 7 bytes of data 

  if (Wire.available() == 7) {            // 7 bytes of data are available
    byte data[7];
    for (int i = 0; i < 7; i++) {
      data[i] = Wire.read();              // Read data into an array
    }

    unsigned int distance = (data[1] << 8) | data[0];                   // DistanceValue
    unsigned int signalStrength = (data[3] << 8) | data[2];             // signal strength

    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.print(" cm  \n");
    int A = distance;
    char distanceStr[10];
        snprintf(distanceStr, sizeof(distanceStr), " D %d\n", A);

    Serial.println(distanceStr);
                
    XBee.write(distanceStr);
    delay(1000);
  }

                 
}

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