✨ HiLetgo 2pcs 5V 2004 1602 LCD Display IIC I2C Adapter IIC Serial Interface Adapter for Arduino Robot Parts Review

Simplifies connection to LCD screens with just cables. The board is ideal for projects that require clean I/O. It has a potentiometer on board which is great

While there are some Arduino references for getting this to work with a 16x2 LCD, I've found that CircuitPython references are limited. After a few days of searching, trial and error, I got this with my Itsy Bitsy M4 board! I'm also planning to add some LCDs to the I2C chain.

My project required almost all the pins on my Arduino so I couldn't use a simple shift register. I only got this backpack to use the I2C bus with a standard LCD board. The backpack worked great. Make sure to download and install the LiquidCrystal_I2C library to use this.

While these display interfaces weren't necessarily expensive, I expected better workmanship. That was my fault. The boards were not cleaned properly, the soldering was of poor quality. I'm very disappointed but don't want to send it back. I can repair and clean soldered joints myself to my satisfaction.

If the display is lit but there are no icons, check the blue variable resistor setting on the control board. Mine was completely upside down when it came out of the factory. One I tested with a Phillips jeweler's screwdriver had the circuit board and display working properly.

If the display lights up but there are no characters, check the setting of the small blue variable resistor on the control board. Mine was completely upside down when it came out of the factory. One I tested with a Phillips jeweler's screwdriver had the circuit board and display working properly.

Used to adapt the LCD SPI interface to the Arduino UNO. It maps data from the nRF24L01 RF channel to the UNO's SPI port and works fine. Except sometimes the display goes crazy with markers all over the screen. The LCD didn't do this and used the SPI interface for the UNO. A power restart is required to resolve the issue.

With a clear conscience I had to revise my original review. The board works well except for the LED which is reversed so 4 star rating. The reason the board didn't work for me was that I misinterpreted the I2C address. I used a decimal value, not hexadecimal. my fault By the way, the LED does not affect the operation of the board. I could fix it, but it's not worth the trouble.