Other Arduino Codes and Videos by Robojax

Display VL53L0X distance as bargraph on LCD

VL53L0X Laser distance as bargraph

This video explains how to dispaly input voltage at A0 pin as bargraph on LCD1602-I2C and LCD2014-I2C display..
  1. Robojax LCD Bargraph Libaray (zip file)
  2. I2C Scanner
  3. Introduction to LCD1602-I2C with code
  4. Introduction to VL53L0X laser sensor
  5. Arduino You Know Course on Udemy

 * This Arduino sketch display distance measured 
 * using VL53L0X laser sensor  as bargraph on LCD1602-I2C
 * (Simple project)
 * Advance code at http://bit.ly/rj-udemy
 * Original library was taken from https://playground.arduino.cc/Code/LcdBarGraph/
 * Modified by Ahmad Shamshiri on May 31, 2019 at 03:43 in Ajax, Ontario, Canada
 * Visit http://robojax.com/learn/arduino for other Arduino codes
 * Watch YouTube video instruction for this code: https://youtu.be/vJStXiSS23Q
 * Robojax Arduino Course on Udemy where  you get Schematic Diagram of this sketch 
 * and many other robotics related lectures and codes. Purchase the course here: http://bit.ly/rj-udemy
 * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

This is Arduino code to measure distance with VL53L0X and display it on LCD1602 with I2C module
Distance is displayed in mm (millimetre) or cm (centimetre).

Original Laser Sensor source source: https://github.com/adafruit/Adafruit_VL53L0X
Modified by Ahmad Shamshiri for Robojax.com
Date Modified: June 28, 2018 at 19:06 in Ajax, Ontario, Canada

Pin connection

VL53L0X Pin  Arduino Pin
VCC         5V
GND         GND
SDA         A4 or SDA if available
SCL         A5 or SCL if available
GPIO1       leave it unconnected
XSHUT       unconnected


#include <Wire.h>
#include <VL53L0X.h>
VL53L0X sensor;
#define maxDistance 200

int VCC2= 2;// 2nd VCC for laser sensor

#include <LiquidCrystal_I2C.h>
byte lcdNumCols = 16; // -- number of columns in the LCD
byte lcdLine = 2; // -- number of line in the LCD
// Set the LCD address to 0x26/0x3F for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x3f, lcdNumCols, lcdLine);// use I2C Scanner to find the address: 0x27 or something like that

#include <LcdBarGraphRobojax.h>
LcdBarGraphRobojax rjx(&lcd, 16, 0, 0);  // -- creating 16 character long bargraph starting at char 0 of line 0 (see video)

void setup()

  pinMode(VCC2, OUTPUT);// set pin 13 HIGH for extra 5V
  digitalWrite(VCC2, HIGH);// make pin 13 HIGH so we have extra 5V


  // Start continuous back-to-back mode (take readings as
  // fast as possible).  To use continuous timed mode
  // instead, provide a desired inter-measurement period in
  // ms (e.g. sensor.startContinuous(100)).
  // initialize the LCD, 
  lcd.setCursor (0,1); //  
  lcd.print("Bargraph VL53L0X"); 
    // Turn on the blacklight and print a message.
  // -- do some delay: some time I've got broken visualization
 lcd.clear();// clear the screen from previous value


void loop()
  int distance =sensor.readRangeContinuousMillimeters();
  //int distance =sensor.startContinuous(100);
  rjx.clearLine(1);// clear line 1 to display fresh voltage value

  // -- draw bar graph from the analog value read
  rjx.drawValue( distance, maxDistance);
  // -- do some delay: frequent draw may cause broken visualization
  lcd.setCursor (0,1); // go to start of 2nd line
  lcd.setCursor (7,1); // go to start of 2nd line 
  if (sensor.timeoutOccurred()) { Serial.print(" TIMEOUT"); }



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