This library is not available in the compiler. Arduino Wire Library. This IC can control until 16 digital devices like button or LED with only two pins. PICAXE uses the i2c and hi2c commands. You can find it here. The Wire Library. Contrast adjust. Luckily, there is a Dallas Temperature library for the arduino which makes using this sensor very easy. Keep up the good work! " "Thanks! Works a treat!" Simulator for Arduino is the most full featured Arduino Simulator available at the present time (watch the latest video below). Not all systems have the I2C development libraries and headers installed, and when you build wiringPi, it detects this at build time. 96 I2C OLED displays using Arduino and NodeMCU. On the Arduino boards with the R3 layout (1. The Driver is based on Adafruit Arduino library, I ported the code to be able to compile and run on Raspberry Pi but added also some features. There is an alternative approach that uses an PCF8574(P) I/O expander that connects to the Arduino Uno via I2C using just 2 data lines. The next step is to download and install the Arduino I2C LCD library for use with the backpack. Using I2C is simple on the Arduino IDE; The ESP32's Wire library could help us. I'm trying to work with Arduino board and MATLAB. Look for Adafruit BME280 Library by Adafruit. If the PCF8574A is used instead of the PCF8574 the I2C address is: 0x38 | 7 = 0x3F. Arduino + cheap i2c LCD Backpack can see one I hooked up in 4 bit mode using 2 pins for Register Control and 4 to latch data in using the LiquidCrystal library from Arduino. This is a library for driving LiquidCrystal displays (LCD) by using the I2C bus and an PCF8574 I2C adapter. But I really want to use your code because it's completely written in C and not in C++ like the Arduino library. As like most devices, we make use of an Arduino library, in this case. [TodBot] shares his latest knoledge about I2C: Ever wanted to use any pair of pins for I2C on Arduino, not just the dedicated pins on Analog 4 & 5? Me too, so I made a quick little Arduino library called "SoftI2CMaster", available in the "blinkm-projects" Googlecode repository. Adafruit released a library that would allow you to read and write to the. Further, when used with the IO Abstraction library, it's almost as easy to use as Arduino. This work was inspired on the Arduino SKD "LiquidCrystal" library and the "LiquidCrystal_I2C" library from Mario_H. First of all, rename the "LiquidCrystal" library folder in your Arduino libraries folder. We’ll show you how to wire the display, install the library and try sample code to write text on the LCD: static text, and scroll long messages. To use the LCD Nanoshield, we provide an Arduino library that allows you to easily control the LCD using only two I/O pins of the I2C interface. The I2C Scanner sketch can be found in the Arduino web site: I2C Scanner. The binary of 0xC0 is 11000000, the binary of 0x60 is 01100000. SDA – SDA Pin of Arduino (mentioned in the backside of Arduino) SCL – SCL Pin of Arduino (mentioned in the backside of Arduino) Finding I2C Address of our backpack: First, we need to find the address of our I2C LCD Backpack. Hello friends, hope you all are fine and having fun with your lives. Many libraries aren't included in the Arduino software by default. We can use either address (0x77 or 0x76). pde, will continuously reads data from the magnetometer for each of the magnetometer's axes using I 2 C. Download I2C LCD Arduino Code and Library Procedure. 0 for Arduino\Library\LiquidCrystal_I2C, click Open. Arduino Wire Library. This guide shows how to use the BME280 sensor module with Arduino to read pressure, temperature, humidity and estimate altitude. Usual setup function in Arduino sketch. Arduino users have written lots of exciting add-ons for Arduino. 96 I2C OLED displays using Arduino and NodeMCU. There's only one LiquidCrystal_I2C. Here, we will use two Arduino one as master and other as slave. The pins work with 5V voltage as maximum, i. arduPi is a C++ library that lets you write programs for Raspberry Pi as if you were writing an arduino program. I try to simplify the use of this IC, with a minimal set of operation. Esplora - this library enable you to easily access to various sensors and actuators mounted on the Esplora board. Values will be displayed on the 16x2 LCD connected to each of the Arduino. Now these I2C LCD's consist of 2 parts usually an HD44780 16×2 LCD and an I2C backpack which connects to the LCD exposing the standard power and I2C pins. install an Arduino library and several examples of using the LCD display. AT24C32 EEPROM and arduino I recently bought a small I2C demo board for the DS1307 RTC from Maxim and the AT24C32 EEPROM for Atmel, these boards are available everywhere and it contains a small battery for the RTC on the underside of the board. So it would be great to learn about communication between STM32 and Arduino by using SPI & I2C bus. See this post in the Arduino forum. Using SSD1306 with SPI mode (4-wire SPI): The SSD1306 library comes with 4 examples, one of them is using the SSD1306 OLED with SPI mode. Read on and I hope you find it helpful. –Specifically Single Master to single Slave, 7bit addressing, 100Kbps bus speed using the Arduino Wire Library with low to medium data signalling rates. We need an other library named Adafruit GFX (graphics library) which can be installed through Arduino library manager or manually by downloading it from the link below: Adafruit GFX library. What's more, it has a DS18B20 temperature sensor on board. In order to ensure there's no hardware issue I tested the i2c communication with the LiquidCrystal_I2C library from the Arduino IDE and it all worked fine. Place all the files in the "LiquidCrystal_I2C" folder. Create a new folder called "LiquidCrystal_I2C" under the folder named "libraries" in your Arduino sketchbook folder. This site is generated automatically from the 2476 libraries registered in the Arduino Library Manager. So it would be great to learn about communication between STM32 and Arduino by using SPI & I2C bus. Learn how to use an LCD with I2C ASAP. This library should come pre-installed with the Arduino IDE. In this tutorial we will learn how the I2C communication protocol works and also we will make a practical example of it with the Arduino Board and a sensor which uses this protocol. Of course in your application the answer will probably not be static but this will suffice to show the workings of I2C. Hello friends, hope you all are fine and having fun with your lives. It is intended to be used with the Time library. There are many I2C LCD libraries available. Place all the files in the "LiquidCrystal_I2C" folder. The Wire Library is a series of files in plain text that exist in the. This is an 16x2 LCD display screen with I2C interface. However, we use and recommend using the normal Arduino IDE from arduino. This screen controlled by a microcontroller SSD1306 uses the I2C bus can communicate with an Arduino, an ESP8266 and even a mini-PC (Raspberry Pi, Orange Pi …). Tutorial - Using DS1307 and DS3231 Real-time Clock Modules with Arduino Posted by John Boxall on November 28, 2014 Keeping the time with your Arduino or compatible board is not only easy but also the base for all manner of clock and timing related projects. A number of customers have asked if the Arduino supports talking to the I2C‑MaxSonar sensors over an I2C interface. Depending on your project, you may choose between SPI and I2C protocols to communicate with the sensor. For that, we will be using I2C Scanner code to display the address in the serial monitor. It's released under the GNU LGPLv3 license and is usable from C, C++ and RTB (BASIC) as well as many other languages with suitable wrappers (See below) It's designed to be familiar to people who have used the Arduino "wiring" system 1 and is. com * * This is code for LCD1602 Display with I2C module * which can display text on the screen. The Arduino Wire Library. Use the "NeoPixelAnimator" branch for ESP8266 to get HSL color support and more. Hi All, Thought you might be interested in this improved I2C library for arduino that I hacked together and tested. After downloading the library, unzip the folder. it initiate the process by sending 1 through the I2c bus. Exercise: I2C Sensor with Arduino Objective. After installing ESP32 in Arduino IDE, We will introduce the library of I2C LCD in Arduino IDE. While this library is sufficient most of the time, there are situations when it cannot be used: the I2C pins A4/A5 (or SDA/SCL) are in use already for other purposes; same I2C addresses devices are used. Suggest, using ur own i2c functions or modding the library, i checked couple of different i2c chips which i had in hand, 24c04 (serial eeprom), ended up writing my own functions cheers. Robot - this library enables easy access to the functions of the Arduino Robot. The Wire library is needed to add support for I2C communication. ARDUINO LIBRARY INTRODUCTION. Also in the header I have defined the size and answer that we will send. A software and hardware Arduino-TWI library is available. Parts List. PubSubClient - MQTT library by @Imroy. A project log for High Resolution Absolute Encoder - Arduino & Pi. Before using I2C, pins for SDA and SCL need to be set by calling Wire. LiquidCrystal I2C. Unzip the library and add it to the Arduino libraries folder, then run Arduino IDE and copy the following code. ESP8266 Arduino tutorial – WiFi module complete review. I try to simplify the use of this IC, with a minimal set of operation. Then make the following connections with Arduino Board. 1 Also in the Motorshield library as well as it's underlying PWMServoDriver library, I had to force it to use the correct I2C channel. To use the I2C protocol with an LCD display and Arduino, there is a special library to be downloaded and included in the code. Create the folder "libraries" in case it does not exist yet. Arduino RTC: TinyRTC v1 with Arduino Mega 2560. What is an Arduino library? It is just a file with pre-programmed functions that will help you manipulate the hardware with much ease. Cheap lcd module, Buy Quality lcd board directly from China display lcd module Suppliers: LCD Display Board Module 1602 2004 12864 PCF8574T PCF8574 IIC/I2C Interface Adapte Plate 5V Blue/Yellow Green Screen For Arduino Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. To use this example first download the IoAbstraction library. Depending on your project, you may choose between SPI and I2C protocols to communicate with the sensor. The library and files all contain the word “wire” because Atmel (the chip at the heart of the Arduino) devised a system called “Two Wire Interface” or “TWI” which is their flavor of I2C. So in order to have the i2c version of the library working you at least have to do the changes the Udoo team has done on the normal LiquidCrystal library. The Relay16 library was designed to make the Iowa Scaled Engineering I2C-RELAY16 control board easy to use with the Arduino TM environment. PICAXE uses the i2c and hi2c commands. For example, capacitive sensing takes difficult timing and pulsing of digital pins. This is the same standard used in the LCD library that comes with the Arduino IDE. The row of pins is attached to the same row of pins on any HD44870-compatible LCD. In AmigaOS one can use the i2c. The complete gEDA design files are available on GitHub. begin(0, 2) on ESP-01, else they default to pins 4(SDA) and 5(SCL). 96 inch 4 pin white I2C OLED module with Arduino. Arduino Leonard uses D2/D3 for SDA and SCL or the separate pins to the left of D13. begin() initializes the Wire library as an I 2 C master and reconfigures analog pins 4 and 5 as I 2 C pins. Schematic. You can scan and find the i2c address used by your devices by find the exact address used by the i2c device for more detail how i2c works please see this link, before we will going to begin you need to have the Arduino IDE and the source code sketch, the code below will scan and find the address which has been used. In this tutorial I will be using the LiquidCrystal_I2C library. 96 inch monochrome OLED display from Geekcreit is connected or interfaced to an Arduino. To download and execute the source files attached to this. ZIP Library. With I2C module you will be able to connect the LCD with Arduino board with only two cables!. Checked arduino forums, i2c (Wire) library is broken, the earlier i2c programs dont work in the new one. * This library is based on work done by DFROBOT (www. Good information about LCDs with I2C adapters at Arduino Info. Using I2C is simple on the Arduino IDE; The ESP32's Wire library could help us. I try to simplify the use of this IC, with a minimal set of operation. I have one question though, I tried to take your example a little further by writing my own I2C code (instead of using the wire library) and to do multiple reads from the accelerometer. Sometimes, you may want to have more than one access your I2C bus. At this point, the best suggestion I'd have is that if one of the above libraries you listed does not support a feature you'd like, fork it, and add support for your feature yourself. In your doc Arduino to Arduino by BlueTooth which uses HC-05’s and Hc06’s has this been updated to work with HM-10’s, or HC-12’s or even the nRf24l01’s. Read data from a sensor that communicates to the arduino via I2C. PIC MCU is connected (SCL, SDA pins) to 24c02 EEPROM. Here, we will use two Arduino one as master and other as slave. Upload Code to. Then add the library to the Arduino IDE as below. Arduino Library List. We can write the code from scratch, or we can stand on the shoulders. The code we have is for any kind of Arduino, if you're using a different microcontroller, the code is pretty simple to adapt, the interface we use is basic bit-twiddling SPI or I2C Install Arduino Libraries. 3v Pro Mini compatible running at 8MHz. Download Arduino U8glib library first. I can test both libraries alone and they are working fine,but not together. max amount for the built in EEPROM of an Arduino. Usually, Arduino LCD display projects will run out of pin resources easily, especially with Arduino Uno. The Arduino sends a character of the alphabet to the XBee. ZIP Library Step 2: Find Sensor Kit V2. h library when they could just roll their own in native C++ using the avr-g…. Step 1: Open Arduino IDE, click Sketch-> Include Library-> Add. DS1307RTC Library DS1307RTC allows you to access real time clock (RTC) chips compatible with the DS1307. In case you missed it, the big news is that a minimal Arduino core is up and working on the ESP32. yes i have tried playing with the contrast. The Library. New LiquidCrystal Library by F. PICAXE uses the i2c and hi2c commands. Arduino I2C Interface. It is included with the Arduino IDE and is supported on most Arduino boards. ~125ns delay. Wire Library This library allows you to communicate with I2C / TWI devices. Library for I2C in Arduino is called Wire. This function is called once when your program begins to run. The nice folks at Arduino have made this very easy with the Wire library. In this example we will interface to an I2C LCD using our Arduino Due. Read data from a sensor that communicates to the arduino via I2C. This folder is usually found at Documents > Arduino > libraries on Windows systems. OK, duh, the i2c is for LCD's with a i2c interface, the normal have a 7wire interface. Pin outs:. Leave me some comments or reach me on facebook, or google +. I used the. I2C-Bus: What’s that? The I2C bus was designed by Philips in the early ’80s to allow easy communication between components which reside on the same circuit board. To install the library – simply open the Arduino IDE and select Manage Libraries… from the Tools menu. With Raspberry Pi and I2C communication, we can connect the Pi with single or multiple Arduino boards. You can use different libraries if you want. 96 inch 4 pin white I2C OLED module with Arduino. Download the library, a zip file (you can download it from here) and extract the contents in. ino" So to not make it long here's the wiring and codes I've used:. First we need to download the library of the display, which includes all required functions to configure and write on the display. My tests to date with much larger 32K eeproms buffering five days worth of data have only lead to a 10-15% overall improvement in the power budget when compared to one day buffering. OK, duh, the i2c is for LCD's with a i2c interface, the normal have a 7wire interface. In case you missed it, the big news is that a minimal Arduino core is up and working on the ESP32. Also in the header I have defined the size and answer that we will send. The HMC5883L is an [[I2C]] device, a type 2-wire serial connection, so we just need to connect the SDA (Data) and SCL (Clock) lines to your Arduino for communication. My Adafruit FRAM I2C Plus Library. The Arduino is a 3. Interfacing Arduino with I2C LCD code: In this interfacing I used a small library named LiquidCrystal_I2C (LiquidCrystal_I2C. I2C (Wire library)¶ Wire library currently supports master mode up to approximately 450KHz. This library should come pre-installed with the Arduino IDE. While this library is sufficient most of the time, there are situations when it cannot be used: the I2C pins A4/A5 (or SDA/SCL) are in use already for other purposes; same I2C addresses devices are used. resource component for AmigaOS 4. com I2 2C Bus. To run this tutorial, you will want to install the Adafruit library found HERE. For all of the different kinds of small OLED monochrome displays, you'll need to install the Arduino libraries. This library uses the original Wire library for communication and is partially compatible with the LCD API 1. Connecting Your Arduino the MCP4725. Tutorial Program Arduino LCD i2c tipe 16x2 dan 20x4 beserta library nya, support arduino nano, uno dan mega, tersedia program lengkap, step by step. However, using the I2C library, I'm getting stuck. This I2C 20x4 LCD display module is designed for Arduino microcontroller. 96" I2c IIC Serial 128x64 LED OLED LCD Display Module for Arduino White at the best online prices at eBay!. 0 //Library version:1. It's been fully tested without any issues up to a maximum of 4 LCDs of varying dimensions as in the attached picture above. Specifications. It comes packaged with the Arduino IDE, so there’s no need to install it. Before using I2C, pins for SDA and SCL need to be set by calling Wire. Arduino and I2C LCD in Proteus Date: 01/04/2019 Author: asmlektor 2 Comments I wrote this post because, like to me, you probably had a problem with simulating the operation of a 16×2 or 20×4 LCD in the Proteus program. resource component for AmigaOS 4. Now onto the sketch. * You only need one 4. First of all, rename the existing "LiquidCrystal" library folder in your Arduino libraries folder as a backup, and proceed to the rest of the process. Major features include: • I2C and SPI bus • Supports "original" (Uno, Duemilanove, and their clones), Mega 2560, Leonardo, and Due. With I2C module you will be able to connect the LCD with Arduino board with only two cables!. Depending on your project, you may choose between SPI and I2C protocols to communicate with the sensor. The sketch for the video above is the sh1106_128x64_i2c sketch included in the modified library I mentioned. yes i have tried playing with the contrast. On the Arduino Mega, SDA is digital pin 20 and SCL is 21. The Arduino is simple, cheap and power efficient but has limitations. The DS1307 runs at 100 kHz. This library allows you to communicate with I2C / TWI devices. Contrast adjust. 1 Also in the Motorshield library as well as it's underlying PWMServoDriver library, I had to force it to use the correct I2C channel. zip Online Manual; LCD library for HD44780 based LCD's This library can be used to access a HD44780-based character LCD module. Arduino UNO; I2C LCD display 16×2; DHT11 Temperature and Humidity Sensor; 4. DHT11 Library Wire Library LiquidCrystal_I2C Library. DS1307RTC Library DS1307RTC allows you to access real time clock (RTC) chips compatible with the DS1307. This Arduino Tiny RTC I2C module incorporates the DS1307 I2C real time clock IC and the 24C32 32K I2C EEPROM storage. cc, but still don't get much from the material on gitHub because trained programmers would never stoop to using the wire. Allow serial communication on other digital pins of the Arduino; Wire. The row of pins is attached to the same row of pins on any HD44870-compatible LCD. The Driver is based on Adafruit Arduino library, I ported the code to be able to compile and run on Raspberry Pi but added also some features. yes i have tried playing with the contrast. The only difference between the two is the I2C base address. Is there a simple library to talk to I2C for C++? I have found some stuff for python and Java, but I wanted C++. Then connect your Arduino to the computer via USB: Software Setup. This IC can control until 16 digital devices like button or LED with only two pins. Now my example below required the I2C address to be changed to 0x3F, a lot of the example I have looked at are 0x27. It uses the Arduino-GPIO library and can be used on AVR and SAM based boards. Esplora - this library enable you to easily access to various sensors and actuators mounted on the Esplora board. Then use the function Wire. This library will default to I 2 C Fast Mode (400 KHz) when using the hardware I 2 C interface. Please use the. See this post in the Arduino forum. It is intended to be used with the Time library. This is the I2C LCD "backpack" I was referring to: At the center of the board is the PCF8547 controller by NXP. The standard I2C library for the Arduino is the Wire library. Further, when used with the IO Abstraction library, it's almost as easy to use as Arduino. First of all, rename the "LiquidCrystal" library folder in your Arduino libraries folder. A catalogue of the 2476 Arduino Libraries. begin(address) (not used here) initializes the Wire library with the Arduino functioning as a slave at address address, useful if you want to use the Arduino as an I/O expander for another Arduino, build a BlinkM, or something. Here is pic shows how to connect an Arduino 1602 I2C module. Hi All, Thought you might be interested in this improved I2C library for arduino that I hacked together and tested. Have fun! Updated 2018-04-16. Yún devices Library. PIC MCU is connected (SCL, SDA pins) to 24c02 EEPROM. Devices such as the PCF8574 provide an easy way to expand both input and output capabilities using a single chip, and because it's on i2c, needs only two pins from the Arduino (SDA and SCL). The Colorduino takes a lot of the difficulty out of of controlling an RGB LED matrix, something I was stumped with as a beginner in electronics. But I really want to use your code because it's completely written in C and not in C++ like the Arduino library. I2C Addresses: OBD I2C Address: 0x68; MEMS I2C Address: 0x62. i About the Tutorial Arduino is a prototype platform (open-source) based on an easy-to-use hardware and software. Simulator for Arduino v1. For the latest news and developments, please see the Wiki in the Arduino playground. Now my example below required the I2C address to be changed to 0x3F, a lot of the example I have looked at are 0x27. The PCA9555D based 32-bit I/O I2C Expander board is for use with any micro-controller such as Arduino, PICAXE, Raspberry Pi, etc. Technology goes ahead exponentially with each year whether we do something or not. The next step is to download and install the Arduino I2C LCD library for use with the backpack. Download I2C LCD Arduino Code and Library Procedure. Buy WINGONEER 5PCS IIC I2C TWI SPI Serial Interface Board Module Port for Arduino LCD1602 Display: Electronics - Amazon. Arduino is a prototype platform (open-source) based on an easy-to-use hardware and software. The OLED display is connected to the Arduino using i2c buses, so the “wire” library is used here. The short answer is "Yes. We'll be showing how to connect with an Arduino, for other microcontrollers please see our MCP23008 library code for the commands to send to the i2c i/o expander. The board itself needs to be connected to the SCL and SDA lines coming out of the Arduino, as well as ground. For that, we will be using I2C Scanner code to display the address in the serial monitor. MATLAB ® Support Package for Arduino ® Hardware includes the I2C library, which creates an interface to communicate with I2C devices. DS3231 Arduino Clock The DS3231 is a simple time-keeping chip. There is an alternative approach that uses an PCF8574(P) I/O expander that connects to the Arduino Uno via I2C using just 2 data lines. Copy the folders under the Library folder to the libraries folder in Arduino (if you cannot find the path in Arduino, open Arduino IDE, click File ->Preferences, and you can see the path in the Browse box, as shown in the following diagram). h library the compiler was trying to use instead of the Arduino one. Set up according to the following image. STM32 has more features than Arduino board. The Arduino Wire Library. In my last post I discussed using the built in EEPROM to store permanent data on the Arduino. I've now switched over to avr studio, but that got me even further away from solving it. Arduino MCP4725 DAC Tutorial. Rich woman looking for older man & younger woman. Then download our MPL115A2 Arduino library and example code for temperature, pressure and basic altitude calculation. While this library is sufficient most of the time, there are situations when it cannot be used: the I2C pins A4/A5 (or SDA/SCL) are in use already for other purposes; same I2C addresses devices are used. I2C eeprom write cycles use about 3mA for 5-6 ms, and this often keeps your arduino processor awake an drawing power as well (usually @ 4-5 mA). A library for I2C LCD displays. Install Library. h and an assembler module i2cmaster. First of all, rename the "LiquidCrystal" library folder in your Arduino libraries folder. Philips Semiconductors migrated to NXP in 2006. There is an alternative approach that uses an PCF8574(P) I/O expander that connects to the Arduino Uno via I2C using just 2 data lines. Ever wanted to use any pair of pins for I2C on Arduino, not just the dedicated pins on Analog 4 & 5? Me too, so I made a quick little Arduino library called "SoftI2CMaster", available in the "blinkm-projects" Googlecode repository. 54 (Breadboard type). Unzip the file and rename the folder LiquidCrystal to LiquidCrystalI2C by copying it to the folder LIBRARIES the IDE of your Arduino. This is a library I put together to use intelligent i2c LCD displays. This is a library for the Adafruit INA260 breakout:. UPDATE: Library dan koding dari program LCD i2C berikut sudah saya update, dan tentunya yang ini udah bisa digunakan untuk ESP8266, NodeMCU, Wemos, dll. pde, will continuously reads data from the magnetometer for each of the magnetometer's axes using I 2 C. Each pin can provide or receive a current of 40mA, and has a pull-up resistance of about 20-50k. Francisco Malpartida's New LiquidCrystal wiki and download. Robot - this library enables easy access to the functions of the Arduino Robot. Unzip the downloaded file. Can read and write digital value with only 2 wire (perfect for ESP-01). The Raspberry Pi will have the USB power, while the Arduino has power from the computer USB serial connection. I am using the I2C IRQ and want to know when all the bytes have been received from arbitrary-sized messages. Also in the header I have defined the size and answer that we will send. the PI sends 3 to arduino as a successful read. The first thing we need to do is to define the i2c LCD address i will put here the code of the i2c scanner. Here's the wiring diagram: Another option is to use the u8glib library, a versatile library that covers almost all monochrome LCDs and OLEDs. There are many I2C LCD libraries available. All of this in a tiny package of 25mm x 28mm x 8. On most Arduino boards, SDA (data line) is on analog input pin 4, and SCL (clock line) is on analog input pin 5. The Arduino Wire Library. Library contains JST header, 2,3,4,5 pin Spring terminal block 2,3,4 pin Arduino Leonardo Arduino Pro-mini PCA9306 I2C level shifter Digispark PanStamp Sparkfun WTV020SD Audio breakout Adafruit 7-segment LED backpack Adafruit 128x32 OLED backpack Transistor Array SOIC-16 Resistor Array SOIC-16 Date: 12/14/13. Mario LiquidCrystal_I2C V. I2C-RELAY16 Library Reference Introduction. The Raspberry Pi will have the USB power, while the Arduino has power from the computer USB serial connection. It just can be used as a replacement for the LiquidCrystal library. Download: Wire is included with Arduino Brian "nox771" has written an improved I2C library for Teensy 3. It starts by loading all of the libraries we just spoke of, along with the Arduino Wire Library to communicate via I2C. The handy thing about it is that there is an integrated battery, so the clock can continue keeping time, even when unplugged. Then connect your Arduino to the computer via USB: Software Setup. h library, which allows you to communicate with I2C devices.