8/26/2023 0 Comments Arduino wire library for esp32![]() ![]() Serial.print("I2C device found at address 0x") a device did acknowledge to the address. The i2c_scanner uses the return value of Serial.println("\nI2C address Scanner ") īyte error, address //variable for error and I2C addressįor (address = 1 address < 127 address ) While (!Serial) // Waiting for Serial Monitor Serial.begin(9600) // The baudrate of Serial monitor is set in 9600 To run this program you need to install a library Liquidcrystal, If it not installed on your Arduino IDE download from this Link.Ĭopy and paste the below code on Arduino IDE and Select the COM port of ESP32 and Board as ESP 32 Wrover module and Click on Upload. ![]() Look at the below table for detailed pin connections between ESP32, LCD and potentiometer. If you are using an external power supply 5v to ESP through VIN then connect the same wire to the LCD where 5V is required. ![]() We used the LCD display which need a voltage of 5V we connected it to the VIN of the ESP where we can get 5V while microUSB is connected to the ESP 32. Lets connect them by following the below Schematic diagram.Īs you can see from the above circuit diagram we have added a 10 K Potentiometer which is used to adjust the contrast of the LCD display so the the characters are visible clearly. In this case, our Arduino acts as I2C slave. We can use Wire library to interact with I2C. This method is relatively complex when compared with another method as it includes bunch of connecting wires which allocates more number of pins on ESP32. 6.3 Writing Program The first step is to write Arduino program. In this method we are connecting the LCD module to ESP by using 12 connecting wires from 16 pins on the LCD Display. with a jumper for Turning on and off the Backlight of the display.ĮSP32 Pinout: Click to enlarge Method 1) Interfacing 16X2 LCD module with ESP 32 without using I2C adapter This module has a PCF8574T chip which can handle 16X2 and 20X4 displays and has an inbuilt potentiometer to adjust the contrast. We choose the components according to value for money. You can buy the required components from the given best buy links. LCD 16X2 module with or without I2C adapterġ0K potentiometer (if without I2C adapter) Requirements (Bill of Materials): Product Name
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