So i received my oled screens yesterday, however, what seemed to be very easy is becoming a real headache.
I bought these oleds.
I connected as follows:
VCC <–> arduino uno’s 3.3V
GND <–> Arduino GND
SCL <–> A5
SDA <–> A4
(also tried SCL <–> Arduino SCL and SDA <–> Arduino SDA, the 2 ports above the AREF port).
I also tried with VCC <–> arduino uno 5V, and also tried an external 5V power supply which doesn’t work either.
Then i used the I2C scanner and found out the address is 0x3C, so i changed Adafruit’s example sketch to 0x3C instead of 0x3D.
When i upload the sketch to my board, nothing happens (i.e. the display does not even light up).
I’ve been searching for hours but couldn’t make it work
I’ve seen many people using 4K7 pull up resistors etc but i don’t think that’s necessary with my display?
Also, upon connecting the VCC and GND, shouldn’t the display fire up (because mine remains completely off) ?