Author: Olteanu Eduard-Florin

The main focus of this project is to be able to accurately measure low-voltage batteries in order to determine whether or not they are still functional.

Additionally, the user can save the values in a database in order to be easier to remember or review the values at a later time and not measure them again.

• ESP32 Microcontroller
• ADS1115 ADC
• 16×2 I2C LCD
• Push Button
• Multimeter cables
• Wires
• Breadboard

The libraries used are:

#include <Adafruit_ADS1X15.h>
#include <WiFi.h>
#include <LiquidCrystal_I2C.h>
#include <Arduino.h>
#include <Firebase_ESP_Client.h>

The main usecase of this project is to measure the voltage of batteries.

We can see that the value is pretty accurate, only 0.01 error delta.

Also, if the button is pressed the value is stored in the database.

• https://ocw.cs.pub.ro/courses/iothings/laboratoare/2022/lab4
• https://how2electronics.com/how-to-use-ads1115-16-bit-adc-module-with-esp32/