Once you have finished the soldering work , get four jumper wires and connect the LCD module to your Arduino as per the instruction given below. (lcd display to arduino wiring) Arduino Setup. For this ...

In this case it was the <LiquidCrystal_I2C.h> library and a code example for that library by ‘Arduino uno guy’. Adding a couple of analogue reads and some arithmetic, as well as finding more about lcd ...