#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); // Connection (SCL- D1, SDA-D2)
void setup() {
Serial.begin(115200);
// Use predefined PINS consts
//Wire.begin(); //The ESP8266 automatically assigns the default I2C pins:
//SDA = GPIO4 (D2), //SCL = GPIO5 (D1)
// If you need to use different pins, you should use Wire.begin(SDA, SCL);,
//but for ESP8266, the default works fine.
lcd.init(); // Correct function to initialize the LCD
lcd.backlight(); // Turn on the backlight (if needed)
lcd.home();
lcd.print("Hello, NodeMCU");
}
void loop() {
// do nothing here
}
esp:0
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esp:3V3
esp:EN
esp:VP
esp:VN
esp:GND.1
esp:D2
esp:D3
esp:CMD
esp:5V
esp:GND.2
esp:TX
esp:RX
esp:GND.3
esp:D1
esp:D0
esp:CLK
lcd1:GND
lcd1:VCC
lcd1:SDA
lcd1:SCL