Arduino/ESP32 Bar graph library uses custom charactors to draw bar graphs on LCD displays.

Copy LcdGraph.cpp and LcdGraph.h into your project.

To use non a I2C LCD remove #define USE_I2C from the LcdGraph.h header file.

Include the header file

#include "LcdGraph.h"

Create an instance of LcdGraph

Call init() to set number of columns and rows as well as the start column and row.

Call createChars() to set the LCD display's custom charactors

Call addValue() to add a value to the graph

Call drawGraph() to update the LCD display with the updated graph values

Try it out in the Wokwi online ESP32 simulator