Hello,
I am having trouble getting my LCD with interface to work with my MSP432 microcontroller. I have followed all the instructions you have here and the code compiled and uploaded just fine. But nothing shows up on the display. I'm not sure why you suggest the first step to level up the voltage as there is a 5V pin on the MSP432 which I am using. Do you have any ideas on how I can troubleshoot the problem? Here is the code I am using:
#include <Wire.h>
#include "LiquidCrystal_I2C.h"
byte address = 0x64; // LCD I2C address
int columns = 16; // number of columns