Arduino Liquid Crystal 显示不打印

Question

我正在尝试将 Arduino Uno 的液体 crystal 显示屏用于学校项目。我完全按照 https://www.arduino.cc/en/Tutorial/HelloWorld 上的说明进行了操作，它没有打印文本。背光正常，对比度用电位器调整，但是没有文字出来。

#include <LiquidCrystal.h>
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
    // set up the LCD's number of columns and rows:
    lcd.begin(16, 2);
    // Print a message to the LCD.
    lcd.print("hello, world!");
}

void loop() {
    // set the cursor to column 0, line 1
    // (note: line 1 is the second row, since counting begins with 0):
    lcd.setCursor(0, 1);
    // print the number of seconds since reset:
    lcd.print(millis() / 1000);
}

`

Answer 1

从您链接的图片来看，显示器似乎没有正确连接：您应该先将排针焊接到它上面。

见红色箭头附近部分：https://i.imgur.com/eSOMe1x.jpg

Arduino Liquid Crystal 显示不打印

Arduino Liquid Crystal Display not printing

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