Hello!every body I have a question
How to change lcd I2C analog in
I want change A4,A5 to A2,A3
Should I to change LiquidCrystal_I2C libraries?
On a Arduino Uno board, the I2C bus is fixed to pin A4 and A5.
That is how the microcontroller (ATmega328p) is made. Many pins have extra functions. The I2C hardware inside is only connected to A4 and A5.
This pinmapping page shows the functions of the pins of the microcontroller.
Other boards use other pins.
If in your project Shields collide, could get help using Go Between Shield. But as mentioned Erdin, some signals are fixed on Uno board and cannot be moved or duplicated.
You could look for an I2C software emulation libary.
However it is possible to use the bus on up to 127 devices so long as they have differant addresses, so you probbley have no need to change the pins.