To control the OLED display you’ll need the 'Adafruit_GFX.h' library and the 'Adafruit_SSD1306.h' library. SCL(Serial Clock) – A5 of Uno Board(on the Mega it is 21).SDA(Serial Data) – A4 of Uno Board(on the Mega it is 20).

It is used to synchronize all data transfers over the I2C bus.Ĭonnection of OLED Display with Arduino UNO This oled display works on i2c communication, So it has only four pins. Display area: 7mm x 25mm / Board Size 12.0mm x 39mm.The display uses the SSD1306 chip and can be interfaced with any microcontroller through I2C/SPI communication protocol. Due to this pixel configuration it is possible to design and display graphic bitmaps: logos, avatars, sprites. Because background is ink black the ON pixels stand out pretty nicely and readability is perfect. OLED or organic light-emitting diode is a light-emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compound (millions of small LED lights) that emits light in response to an electric current.Īn 128×32 OLED device can be considered as a matrix of 4,096 individual pixels that each can individually be set ON – they light up – or OFF – just background.

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