I2C sweep check practically all numbers

Hi Railroader,

It's pretty straightforward, exactly like the Arduino UNO connection like follows:
Wiring-Fritzing-Connecting-128x64-OLED-Display-Module-With-Arduino

Here's a pic of mine:

Only that the chip is an ARM Cortex M0.

I've checked the voltage across the Vcc and GND and it's all ok, 5V.

It worked with a servo previously so I doubt power is the issue though.

Vizier87