My Arduino Pro micro doesnt have A4 and A5 Pins

[kuglatec]

I want to use the Wire.h library for my project and im following a guide at https://www.instructables.com/Communicating-With-Two-Arduinos/
an noticed, that my board doesnt have the A4 and A5 pins, but it has A0, A1, A2, A3
Can i somehow change the pins in the software or is there any other workaround?

[kolaha]

are you noticed there and yours are completely different boards?
Arduino sell no board with name "Micro Pro". so what board do you actually got ?

[oldcurmudgeon]

Did you mean PRO MINI? A4 and A5 are on the inside of the board above pins 12 and 13. A6 and A7 are above A3 and VCC.

[van_der_decken]

A Pro Micro doesn't have A4 and A5. And it's a 32u4 based board, not an ATMEGA328P board.

If you mean a Pro Mini, it does have A4 and A5. They're the holes just inboard from A3, and may be labelled SDA and SCL, or may not be labelled at all.

[MaximoEsfuerzo]

Sparkfun Pro Micro have SDA and SCL in pins 2 and 3, respectively (like Arduino Leonardo).

[van_der_decken]

Head slap! I didn't realize the OP was actually looking for the I2C pins. That'll teach me not to read closely.

[MaximoEsfuerzo]

Attention @kuglatec ! The tutorial in the link has a gross error, the I2C bus needs pull-up resistors (47K or less) in both cables (SDA & SCL), the tutorial does not even mention them.