To install it we just go to Program -> inport library and we open the. You can download the LiquidCrystal library here: In order to make the LCD work we need to inport the LCD library for arduino. We connect the arduino to USB and we are ready to program. The SDA pin of the i2c module conected to arduinio A5 and the SCL pin to A4. Power the LCD module to 5 volts and connect the ground as well. This library is included with the Arduino IDE, so theres no need to install it. Since the use of an LCD requires many microcontroller pins, we will reduce that number using serial communication, which is basically sending 'packages' of data one after another, using only two pins of our microcontroller, pins SDA and SCL which are the analog pins A4 and A5 of the Arduino NANO or pro mini.įirst of all we connect i2c pins module as shown in the schematic. To use the Arduinos built-in I2C interface, we will use the Wire library. Arduino 1, the Master, is programmed to send 6 bytes of data every half second to a uniquely addressed Slave. Several functions of Arduino's Wire Library are used to accomplish this. I’ve listed them below in the order that you’re likely to use them. These are made available in your code by using the command include Wire.h at the top of your sketch.

Wires, conectors, solder, soldering iron. In this example, two boards are programmed to communicate with one another in a Master Writer/Slave Receiver configuration via the I2C synchronous serial protocol. There are nine functions created by the Wire library, that you use to make I2C magic happen with your Arduino. Serial TTL/FTDI FT232RL module (Just in an Arduino pro mini case) (2€-3€) LINK eBayĦ. One Arduino NANo or pro mini (small size) (2€-3€) LINK eBayĤ. All the prices are low due to China purchase.

I2c wire library master arduinos