Nodemcu 8266 has not display text on LCD

Question

I am using nodemcu esp8266 with LCD for the first time and I'm unable to make it work. It lights the background but it does not show any text.

LCD Address: 0x27 sda: d4 sdl: d3 vnn: vin gnd: gnd

Code:

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

//Set LCD Address 0x27 for LCD1602 (16 chars 2 line display)
LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  // put your setup code here, to run once:

  lcd.begin(0,2);  // SDA-0 (GPIO D3 = 0), SCL-2 (GPIO D4 = 2)  

  lcd.backlight();

  lcd.print("Hello world");

}

void loop() {

}

use pins D1 as SCL and D2 as SCA at least while you test it. https://arduino.stackexchange.com/questions/75704/what-are-the-best-gpio-pins-to-use-for-my-project/75706#75706 — Juraj, May 13 '22 at 17:26
I changed D1 as SCL and D2 as SCA but LCD not display as it was. — Jatuporn Jirundorn, May 14 '22 at 01:24
I changed the library from the original to https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library LCD can display text. — Jatuporn Jirundorn, May 14 '22 at 04:27

score -1 · Answer 1 · answered May 14 '22 at 04:28

-1

I changed the library from the original to https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library LCD can display text.

answered May 14 '22 at 04:28

Jatuporn Jirundorn

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Nodemcu 8266 has not display text on LCD

1 Answers1