The example sketches will then also be available in the Open file dialogue. In the library manager, search for hd44780 and then download it - it will soon be ready to use and will appear in your libraries menu.

The best way to get the library is to open your Arduino software and go to the menu:.

Since that video was made, we have switched to using the hd44780 Library:Ĭreated by Bill Perry example code is unlicensed and is released into the public domain Wire is already included in the Arduino IDE but you will need to download NewLiquidCrystal - click here to download: In our video, we used the NewLiquidCrystal Library. T o use an I2C ready LCD Display or I2C Backpack Adaptor Module with Arduino you will need the Wire Library and a Library for I2C LCD. Serial.I2C Arduino Code for LCD Displays & Adaptor ModulesĬlick Here to watch our YouTube Video for a full description

Wire.requestFrom(SLAVE_I2C_ADDRESS, 1) // This register is 8 bits = 1 byte longĭelay(2) // Wait for data to be available Wire.beginTransmission(SLAVE_I2C_ADDRESS) const uint8_t SLAVE_I2C_ADDRESS = 0b1010 Ĭonst uint16_t SLAVE_I2C_REGISTER_ADDRESS = 0x50 We will provide a full example with error handling in a followup post. This is a minimal example so it creates minimal confusion for the reader. Additionally, we wait for data using delay() instead of Wire.available(). Note that this code does not implement error handling for the sake of simplicity. In my opinion, it’s most efficient to just try out the standard way of reading a register and start from there.

Note that some devices like the LAN9303 have a slightly different addressing scheme or other peculiarities. It will work with almost all I2C devices like EEPROMs, ADCs and others, provided you have the correct.

The following code demonstrates how to read a register that is 1 byte (8 bits) long over I2C.

Arduino wire print library