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

I ordered two, weeks apart, and got two different products. The first one was great, clear, bright, high speed display updates, and good contrast and viewing angle. The second one looked very similar but the display was a little taller, and unfortunately has a spot in the backlight, the display is dim, updates slowly, and the viewing angle is not good. I want another one like the first one. Update: I have purchased three of these now and two are slow and dull with lousy viewing angle and contrast. I want another one of the good ones!!

Display worked as expected. I had trouble initially setting up in code as I have only used 2x20s in the past. I sent an email to HiLetgo and they responded with all the info I needed. I highly recommend.

The display arrived in a padded envelope but well protected by several layers of bubble wrap. Internet searching for 20x4 LCD Arduino I2C provided code for testing and hookup data. I used the newest library for LCD display on my Arduino: LiquidCrystal_I2C. My display had an I2C address of x3F. If yours doesnt just google I2C address sniffer for an app that will ferret out your LCDs address. Nice clean product that works fine-- word of advice.. if no display results be sure and adjust the pot on the back of the unit, also I had to put in a jumper on the back I2C board to get the backlight. Ordered 7/26/18 got it 7/30/18 - over a weekend!

price very good deliver fast come assembled

Great product and works as designed. One screen came with a loose connection on the contrast potentiometer. At first one of the screens would not display the text and after looking into it I could get the I2C address but it wouldnt display any text. The green back light was fine and after testing the contrast pot I found that it was soldered enough, so I added solder and it works great now. Good price!

It works as expected. Pretty easy to read once you adjust the contrast. Rated at 4 stars because it comes with zero documentation. They do seem to be pretty standard so I was able to get it working using an example for Arduino online.

Worked as expected.

Display works. Sometimes. It will go from being perfectly readable to blackboxes and gibberish simply by looking at the display for too long. Contrast potentiometer does not stay set somehow. Spend the extra $4 to get a similar display from a better seller.

It merely performs the expected functions that it should as marketed. It is a cost-effective solution which can be quickly attached to Arduino (I use custom 4-line ribbon to group and distribute SDA SCL and assure proper power inputs to the four-pin parallel-to-serial add-on soldered to the back of the 20 x 4 display. Its a snap to apply the LCD to an AT-mega.

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