I have 4 16x2 LCD Displays all connected to the same I²C bus.
Their addresses are 0x20, 0x21, 0x22, & 0x23.
I am trying to get them to all show different information at the same time but the only one I can get to do anything is the one at 0x21.
I currently don’t have any example sketched as I am trying to modify existing incomplete sketches.
I use the #include <LiquidCrystal.h> & #include <Wire.h> libraries.
I tried to use Wire.beginTransmission (0x21); & Wire.endTransmission (0x21); along with lcd.clear(); & lcd.write(“Hello”); to no avail.
My LCD remains unresponsive.
I know it’s a software issue. I just can’t figure out the code, nor can I find an example code for using multiple LCD Displays.
Any help would be appreciated.