![]() The Codeįirst of all you need to download two libraries: Data is placed on the SDA line after SCL goes low, and is sampled after the SCL line goes high. The clock signal is always generated by the current bus master. Messages are broken up into two types of frame: an address frame, where the master indicates the slave to which the message is being sent, and one or more data frames, which are 8-bit data messages passed from master to slave or vice versa. SCL is the clock signal, and SDA is the data signal. It is available on Banggood store for about $5.5.Įach I2C bus consists of two signals: SCL and SDA. This OLED display module is full compatible with Arduino and has an input voltage range between 3.3V and 6V and it need less than 10 mA current, so it can be connected with 3.3V or 5V pins. The module has only 4 pins, two of them are the supply pins, while the others are SCL and SDA, I2C protocol pins, which will be used to control the display. The OLED Driver IC is SSD1306, a single-chip CMOS OLED/PLED driver with controller for organic / polymer light emitting diode dot-matrix graphic display system. ![]() The display used in this tutorial has a very small (2.7 x 2.8cm) OLED screen, that is similar to Arduino Pro Mini size, with 128 x 64 screen resolution. Geekcreit 0.96 Inch I2C OLED Display Module ![]() Sometimes it may be necessary to use a display when making a hardware project, but one confusing thing is the size of the display and the required pins to control it. This tutorial will show you how to use a small I2C OLED display with Arduino using only two wires.
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