I just start learning the Arduino, and English is not my native language, so no offence... :)
The problem: Installing an I2C LCD (20 X 4) and the attached 7 key switch.
I found in my old electronic stock, an I2C LCD display
The module is a 20x4 LCD and has 7 key switch attached to the module.
Using an Arduino I2C scanner, I found that the board is using these I2C address. I unplugged the module, the scanner respond with no I2C address found.
0x20 0x21 0x22 0x2C
I did copy and installed library and code, and run it on the Arduino. Nothing is displayed.
Looking for help me to progress in the installation of the display and get access to the key switch.
Any advised or piece of information appreciated.