Review on 💻 GeeekPi I2C 1602 LCD Display Module - Ideal for Raspberry Pi, Arduino, STM32, Nanopi, BPI Tinker Board - DIY Maker Projects, IoT & Electrical Solutions by Jennifer Johnson

Great little gimmicks. They don't draw much power, in fact I connected power to the Arduino's output pin and can turn it on and off when I need to display something (for super low power consumption). If you're just writing text, the Arduino LiquidCrystal_I2C library has a minimal amount of code that works well. Don't forget that the small two-pin connector on the back requires a jumper (or resistor for dimming) for the display to work. The contrast control on the back optimizes the contrast of the LCD display.