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#Esp8266 arduino i2c example how to#
#Esp8266 arduino i2c example driver#
#Esp8266 arduino i2c example full#
#Esp8266 arduino i2c example software#
#Esp8266 arduino i2c example code#

Installing LiquidCrystal_I2C Library in Arduino IDE

#Esp8266 arduino i2c example how to#

In this section, I’ll show you the library we’ll be using (LiquidCrystal_I2C), how to install it in Arduino IDE, how to make the ESP32 to I2C LCD module connections, and what are different API functions available to use in the library. All of this information does apply to any number of modules up to 8 on the same bus.ĮSP32 (or ESP8266) LiquidCrystal_I2C LCD in Arduino And those are the two I’ll be using in LAB21 to show you how to use multiple I2C LCDs with ESP32 at the same time. Now, I’ve got 2 I2C LCD modules with 2 unique addresses (0x27, 0x26). Therefore, the I2C device address is now 0x26 instead of the default value 0x27. Here, I’ll solder the A0 bridge which forces the LSB in the address to become 0. And potentially be able to use up to 8 different I2C LCD devices on the same bus at the same time. This will allow multiple I2C LCD modules to be connected on the same I2C bus at the same time which we’ll be doing actually hereafter (in LAB21).Ĭhanging The I2C LCD Module Default AddressĪs you know, the 3 non-fixed value bits in the address allow us to make 8 different combinations.

You can solder these solder bridges to change the I2C address of the device. It also shows you that 3 bits of the address are actually controllable by the user. The default address for the PCF8574 IC as stated in its datasheet is shown in the figure down below. In this section, we’ll only discuss the important things in order to get started with these modules as quickly as possible and control them with ESP32 or ESP8266 boards. You can check it out if you’re interested in learning more about it.

#Esp8266 arduino i2c example driver#

In this previous article, I’ve demonstrated everything about this IC using its datasheet and build a driver library (in Embedded-C) for this IC. Moreover, it’s shared with all I2C devices on the bus, so you can still have so many other modules/sensors connected on the same bus.

The I2C IO expander IC (PCF8574) is commonly used as a cheap solution to implement an I2C LCD interface that replaces the classic parallel connection to the LCDs (at least 6 pins) with an easy to use I2C bus (only 2 pins).

#Esp8266 arduino i2c example full#

Get The ESP32 Full Course Kit (List of components).

Or just refer to the table for the exact components to be used in practical LABs for only this specific tutorial. You can either get the complete course kit for this series of tutorials using the link down below.

Arduino IDE For ESP32 (Setup Guide) Hardware Components.

#Esp8266 arduino i2c example software#

ESP32 I2C Communication Tutorial Software Tools.

Requirements For This Tutorial Prior Knowledge

#Esp8266 arduino i2c example code#

8.1 Connect Multiple I2C LCDs With ESP32 – Arduino Code Example.

8 ESP32 Multiple I2C LCDs Modules (in Arduino).

7.1 Display Custom Characters – Arduino Code Example.

7 ESP32 LiquidCrystal_I2C LCD Module – Custom Characters.

6.1 ESP32 I2C LCD Scrolling Text – Arduino Code Example.

6 ESP32 LiquidCrystal_I2C LCD Module – Scrolling Text.

5.1 ESP32 I2C LCD Static Text – Arduino Code Example.

5 ESP32 LiquidCrystal_I2C LCD Module – Static Text.

3.0.4 Using ESP32 LiquidCrystal_I2C Library in Arduino.

3.0.3 ESP8266 I2C LCD Module Connection.

3.0.1 Installing LiquidCrystal_I2C Library in Arduino IDE.

3 ESP32 (or ESP8266) LiquidCrystal_I2C LCD in Arduino.

2.0.2 Changing The I2C LCD Module Default Address.

In this tutorial: 4 LABs LAB18 ESP32 with Single I2C LCD Display Unit – Static Text LAB19 ESP32 with Single I2C LCD Display Unit – Scrolling Text LAB20 ESP32 with Single I2C LCD Display Unit – Custom Characters LAB21 ESP32 with Multi I2C LCD Display Units (2 or more) Without further ado, let’s get right into it! We’ll be using this a lot in future tutorials, so I hope you can follow and do all the LABs listed below successfully. Which does save a lot of GPIO pins and very suitable for many projects. Except for the fact that it does use the I2C bus instead of parallel (4-Bit) data mode. The library APIs are very similar to the standard LiquidCrystal library in Arduino that we’ve used in this previous tutorial. We’ll be using the LiquidCrystal_I2C library with I2C Wire.h library in Arduino Core to interface LCD 16×2 display via the I2C bus. In this tutorial, you’ll learn how to use ESP32 (or ESP8266) with the I2C LCD Display module (PCF8574) in Arduino IDE. Previous Tutorial Tutorial 9 Next Tutorial ESP32 I2C LCD in Arduino IDE | PCF8574 I2C LCD Module ESP32 Course Home Page 🏠