Arduino nano connections to analogue

[bruton]

Ive got a project with I2C LCD, keypad and RS485

I used D5 D6 D7 D8 D9 D10 D11 D12 for keypad.
I now want to add an ethernet module using SPI so need to move at least D12 D11 D10.

Can I use 4 of the keypad on D5 D6 D7 D8 and other 4 on A0 A1 A2 A3 without any problems by using
byte rowPins[ROWS] = {A3, A2, A1, A0};
byte colPins[COLS] = {8, 7, 6, 5};

Or is there more defines I need to make

[GolamMostafa]

@bruton

byte rowPins[ROWS] = {A3, A2, A1, A0};
byte colPins[COLS] = {8, 7, 6, 5};

The above connections should be alright as (by default) A0 - A3 pins are digital pins. These pins become analog pins when the ADC Module is activated by programming the ADEN-bit.

[Grumpy_Mike]

@bruton

Ive got a project

So why did you post in a section that said not for your projects.
Moved it here

[bruton]

@GolamMostafa

A0 - A3 pins are digital pins.

Ahh ok. I didnt know this. All the pinouts etc just say A0 A1 A2 A3 A6 A7 are analogue

[david_2018]

You can use any of the analog pins as digital except for A6 and A7, which are analog inputs only.

There is a library for connecting a keypad using an I2C port expander.

[GolamMostafa]

@bruton

All the pinouts etc just say A0 A1 A2 A3 A6 A7 are analogue

Again: For NANO --
A0 - A5 pins are digital pins by default (after power).
A6 - A7 pins are analog pins and are connected with the internal ADC. These two pins cannot be used as digital IO pins.

[bruton]

@david_2018

There is a library for connecting a keypad using an I2C port expander.

Yes Ive been looking at that as my next method and for future projects will probably try and utilise it for control but im just getting back into projects after a long break and just jumped straight into it without knowing where i wanted to take this project