16x2 LCD With I2C Module
The 16x2 LCD with I2C module is a more efficient version of the standard 16x2 LCD, as it allows communication through just two data lines (SCL and SDA) instead of using multiple pins for data transfer. The I2C module simplifies wiring and reduces the number of microcontroller pins needed for the LCD display.
Working of the 16x2 LCD with I2C Module
The I2C (Inter-Integrated Circuit) protocol allows communication between devices using only two wires: SDA (data) and SCL (clock). This makes the LCD more efficient for systems with limited I/O pins. The I2C interface allows multiple devices to share the same bus and communicate by addressing each device individually.
When the LCD is initialized, commands are sent via I2C to control the display, including setting up the cursor position, clearing the screen, and displaying text. The I2C module simplifies these operations compared to the parallel interface, making it easier to connect multiple devices and manage data flow with fewer connections.
Pinout of the 16x2 LCD with I2C
| Pin | Label | Function |
|---|---|---|
| 1 | VSS | Ground (GND) |
| 2 | VCC | Power Supply (5V) |
| 3 | VO | Contrast Adjustment |
| 4 | RS | Register Select (Command/Data mode) |
| 5 | RW | Read/Write (Low for Write, High for Read) |
| 6 | E | Enable (Activates data transfer) |
| 7-14 | D0 - D7 | Data Pins (Not used with I2C) |
| 15 | SDA | Data Line (I2C) |
| 16 | SCL | Clock Line (I2C) |
| 17 | LED+ | Backlight Positive |
| 18 | LED- | Backlight Negative |
