ESP32 & TM1637显示4位数码管

简介

TM1637驱动4位数码管（4 digital display）是一种比较常用的模块，也是比较常见的数码管驱动方式。为了在数码管上显示信息，尝试了库TM1637（不能用），库Grove_4Digital_Display（好用），因此建议安装后者。
测试中采用了GPIO2作为数码管模块的CLK，GPIO3作为数码管模块的DIO，启用了数码管上的两个点。
tips：以下的代码段的取余很有意思，否则会显示“ABCDEF”和息屏。

    tm1637.display(0, (numCounter / 1000%10));
    tm1637.display(1, (numCounter / 100%10));
    tm1637.display(2, (numCounter / 10%10));
    tm1637.display(3, (numCounter % 10));

结果

源码

#include "TM1637.h"

#define CLK  2 //Set the CLK pin connection to the display
#define DIO  3 //Set the DIO pin connection to the display

TM1637 tm1637(CLK, DIO); //set up the 4-Digit Display.
int numCounter = 0;
bool dian = false;

void setup() {
  // put your setup code here, to run once:
  tm1637.init();
  tm1637.point(1);//小数点开关，1为打开，0为关闭
  tm1637.set(BRIGHT_TYPICAL);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;
}

void loop() {
  // put your main code here, to run repeatedly:
  for (numCounter = 0; numCounter < 9999; numCounter++) //Iterate numCounter
  {
    tm1637.display(0, (numCounter / 1000%10));
    tm1637.display(1, (numCounter / 100%10));
    tm1637.display(2, (numCounter / 10%10));
    tm1637.display(3, (numCounter % 10));
    dian = !dian;
    tm1637.point(dian);
    delay(200);
  }
}