As I wrote in title, I have Arduino Uno and Wemos (0.66” Across) OLED Shield which i bought along wemos d1 mini.

For some reason I want to use it with uno. but there are just 0.96 tutorials internet and I don't know which pins to connect. I would appreciate any help.

PINS UNDER blue stick are

TX RX D1 D2 D3 so on..

Wemos (0.66” Across) OLED Shield -- Driver IC: SSD1306 (I2C Address: 0x3C or 0x3D)

  • how do you know i didn't?
    – Kenan
    Commented Dec 18, 2019 at 22:37
  • were you this informative when you asked your first question?
    – Kenan
    Commented Dec 20, 2019 at 0:38
  • I can find the code i have problem with connecting pins. i would appreciate if you help
    – Kenan
    Commented Dec 20, 2019 at 13:12

1 Answer 1


The first thing I see when googling "0.66 lolin oled" is the link to https://wiki.wemos.cc/products:d1_mini_shields:oled_shield and their Get started guide. This yields the libraries to be used with it:

  • thanks for the help man, but my problem is mainly connecting pins
    – Kenan
    Commented Dec 20, 2019 at 13:15
  • You just stack it ontop of the D1 mini? what hardware are you working with? Also the included schematics (wiki.wemos.cc/_media/…) show you all the pins. Commented Dec 20, 2019 at 13:49
  • No, the thing is, I am not using it with D1 mini, i just bought it along that's it. right now, i need to use it with arduino uno.
    – Kenan
    Commented Dec 20, 2019 at 13:54
  • The Uno is a 5V device and the OLED runs on 3.3V logic. You need a logic level shifter (for example this one sparkfun.com/products/12009) and then just conned the SCL and SDA pins to your Uno for the I2C connection (see schematics for which pin), plus power. I'm not sure if the library is Arduino-Uno compatible though, you'll have to find out and adapt it as necessary. Commented Dec 20, 2019 at 14:38

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