![]() ![]() I2C (i-square-c) stands for “Inter-Integrated-Circuit,” and it was invented in 1982 by Philips Semiconductors (now NXP). We’ll go through how ESP32 I2C works, how to alter the default I2C pins (SDA, SCL), how to connect numerous I2C devices on the bus with proper addressing, and how to make an ESP32 I2C scanner to check for available I2C devices on the bus and obtain their addresses. In the setup, the LCD is initiated with lcd.init() and the backlight is turned on with lcd.backlight().In this article we will learn to use the ESP32 I2C communication protocol (in Arduino IDE). Connect to LCD via I2C, default address 0x27 (A0-A2 not jumpered) You will need to change ‘lcd’ to the new name in the rest of the sketch. You can give it a different name if you want like ‘menu_display’. Note that we have called the display ‘lcd’. When using a 20×4 LCD, change this line to LiquidCrystal_I2C(0x27,20,4) This is where you will need to change the default address to the address you found earlier if it happens to be different. The next step is to create an LCD object with the LiquidCrystal_I2C class and specify the address and dimensions.įor this, we use the function LiquidCrystal_I2C(address, columns, rows). #include // Library for I2C communication The other library imports wire.h automatically. *When using the latest version of the LiquidCrystal_I2C library it is no longer needed to include the wire.h library in your sketch. In the rest of this tutorial, I will cover more of the built-in functions of this library. As mentioned earlier we need both the wire.h* and the LiquidCrystal_I2C library. First, the required libraries are included.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |