Serial I2C LCD Daughter Board Module

From the shop's description

Serial I2C LCD Daughter Board Module The Serial I2C LCD converter for the popular display with controller for example, 2×16 characters. Thanks to this system, two data lines and supply 5 Volts and groundare enough to connect the screen. Converter I2C for display with the controller so that the screen requires only two lines – SDA and SCL. Via the bus, from the level of the Arduino, can be controlled the displayed text and the backlight, including turning them off or on at any time. On board is also a potentiometer to adjust the contrast. In order to use a library for the Arduino, the system should be soldered in accordance with the picture above. Fearures: Converter of I2C bus Installed resistors pulling up the lines of the I2C bus – 4.7 k Ω Converter based on PCF8574 Soldered potentiometer to adjust the contrast The ability to control the backlight through the I2C bus The possibility of changing the bus address via soldering jumpers A0, A1, A2 Addressing I2C Depending on what chipset, this module can have different address spaces: Chipset PCF8574 – 0x20 Chipset PCF8574T – 0x27 Chipset PCF8574A – 0x38 Chipset PCF8574AT – 0x3F To be sure, we recommend the use of a program for Arduino I2C Scanner that reads the I2C addresses for all connected devices. PINOUT: The system has four leads and a jumper which putting out causes turning off the backlight of the screen. On the board is also goldpin strip which is fixed to the populardisplays based on driver. All leads are soldered. No. Name Description 1 GND Mass. 2 VCC Power +5 V. 3 SDA The data line of the I2C bus. 4 SCL Clock line of the I2C bus. Connecting of the display On the back of the tile is 16-pin, male strap goldpin to solder the display based on the controller. Useful links The Arduino Library PCF8574 Datasheet The I2C scanner for Arduino