HiLetgo 2004 20X4 LCD Display LCD Screen Serial with IIC I2C Adapter Yellow Green Color LCD for Arduino Raspberry Pi

Works fine. I did not need, nor want the feature of the IIC board, so I removed it and used the display as a parallel type.

Worked as expected.

No issues with this. Using it with Arduino Uno. Almost plug and play.

It works nicely and seems to be good value for the low cost. I had to play around finding the right library file to get it to work-the one on Last Minute Engineers works fine, and they have a nice tutorial to help get it running.

These are nice display modules with 2 wire I2c interface. Display is sharp and bright. Easy to read with or without the backlight. I tried to get a picture but my phone camera did not do it justice.

The first was defective. The second is great. The I2C address in your program may need to be adjusted

I like the LCD but I have found that if I even move my Audion or the wires around this LCD it will go nuts and start showing trash on the screen forcing me to have to reboot just to get back to working. I havent been able to pin down if its just the wares go to the Arduino or if there something on the display its self or the I2C board that is causing the drop outs. But besides that nit pick it a way better display then the blue 16x2 display I have. Much easier to read even with high sunlight due to the fact its a black text not a white text.

I hooked this 20 x 4 line display up as my temperature monitor. Works great and in programming all you need to know is the lines you are displaying (4) and the max characters you display (20). I blew one with walking on my rug and zaping it with static discharge, now i get square characters.

Good product. Good seller.

I was skeptical that a yellow backlit LCD would be visually appealing, but the contrast between the yellow background and the black letters is the best I have seen of any other color combination. It is amazingly clear and bright. The unit I received has an I2C address of 0x27 just like the product description states. The LiquidCrystal_I2C and LiquidCrystal_PCF8574 libraries from GitHub both work equally well with this unit, so you can use either one. HOWEVER, both libraries turn the backlight off by default so having the backlight jumper on the I2C interface isnt enough, you must ALSO use lcd.setBacklight(1) in your program to activate the backlight.