Arduino液晶显示器不打印

Question

我正在尝试使用Arduino Uno液晶显示器作为一个学校项目。我完全按照https://www.arduino.cc/en/Tutorial/HelloWorld上的说明进行操作，并且没有打印文本。背光正常工作，对比用电位器调节，但没有文字出来。

#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

从您所链接的图像判断，显示似乎没有正确地连接:您应该首先焊接一个引脚头。

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