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I'm trying to hook up an OLED display using I2C communication to my Arduino Pro Mini clone(with ATmega 168, 16MHz) from WAVGAT but I can't figure out where the I2C pins are on the Arduino.

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  • \$\begingroup\$ I2C pins on the Arduino or the OLED display? if display, which one are you using? They are not all the same. \$\endgroup\$
    – jwh20
    Commented Mar 18, 2021 at 12:07
  • \$\begingroup\$ on the arduino. \$\endgroup\$
    – ahmed
    Commented Mar 18, 2021 at 12:08
  • \$\begingroup\$ So what does the Wavgat manual say about it? \$\endgroup\$
    – Justme
    Commented Mar 18, 2021 at 12:08
  • \$\begingroup\$ I can't find the manual \$\endgroup\$
    – ahmed
    Commented Mar 18, 2021 at 12:09

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The "official" Arduino Pro Mini pinout is:

Arduino Pro Mini Pinout from https://www.theengineeringprojects.com/2018/06/introduction-to-arduino-pro-mini.html

So your I2C pins SHOULD BE at the A4 and A5 positions. There doesn't seem to be any information on the WAVGAT model. But that's common with Chinese knock-offs. You get what you get and may have to improvise.

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  • \$\begingroup\$ it worked, thanks \$\endgroup\$
    – ahmed
    Commented Mar 18, 2021 at 12:17

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