Hello! I'm new to Arduino and I have a problem with connecting OLED I2C (SSD1315) display to Arduino Nano - I just can't force it to work. I've tried to use I2C address scanner but it found nothing. I`ve also tried to run different default sketch examples (Adfruit SSD1306 128x64 i2c and u8g2) but no image appeared on the screen. How can I "debug" the problem?
My wiring is:
Check your SCL and SDA connections to the nano, I think you may be off by a pin
SCL is connected to A4 and SDA is connected to A5
You possibly need pull-up resistors on the I2C lines (4.7k)
On that photo, it looks like the Nano's pins have not been soldered. Normally Nano are shipped with header pins pre-soldered.
If they are not soldered, that will be the problem.
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It's Backwards:
A4 -> SDA : A5 -> SCL
start by soldering your nano's pins to the board so that there's an actual connection
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@roshan-baig GOOD eyes, I didn't notice.
Maybe they just read post #5 ?
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well, yes and no. I had noticed that something was funny with the soldering, but I wasn't sure what it was. Reading post #5 explained it. (Sorry, @PaulRB, I should have tagged you).
The solder job still doesn't look the best though, WAY too much solder on those blobs. I'm surprised it isn't shorting the pins.
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You are being very kind to @drift_temperature!
Those absolutely need resoldering. Look at the solder joints on your oled display. That's how they should look.
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Yeah, I know that my soldering is awful 
and I definitely will do re-soldering
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