Tm1637 four digit LED display module Arduino driver with second dot

I bought a few yuan online LED Display module ,IIC Interface ,TM1637 drive , Four digit display , With second dot . Write a for ESP32 Modular ARDUINO The driver , Put your notes here , For future use .

  Module file :TM1637.C

#ifndef TM1637_H
  #define TM1637_H
  /*TM1637 Four place LED Nixie tube ( With second dot ) Display drive , Each digital tube can display one hexadecimal data 0~F, Support second dot display and brightness adjustment .
   *         _________________________________ 
   *GND---- |   __      __       __      __   |
   *VCC---- |  |__|    |__|  .  |__|    |__|  |
   *DIO---- |  |__|    |__|  .  |__|    |__|  |
   *CLK---- |_________________________________|
   *           LED3    LED2     LED1    LED0   
  */
class TM1637{
  private:
    //1/4 Pulse width setting . Using different clock frequencies requires adjusting this parameter to accommodate IIC Bus operation speed .
    #define TM1637_DELAY_US 1
    const uint8_t displayChar[16]={0X3F,0X30,0X5B,0X79,0X74,0X6D,0X6F,0X38,0X7F,0X7D,0X7E,0X67,0X0F,0X73,0X4F,0X4E};// Hexadecimal number BCD code ( Please use different coding arrays according to the connection of the digital tube of the printed board ).
    uint8_t DIO=26;//IIC cable .
    uint8_t CLK=27;//IIC Clock line .
    uint8_t Brightness=0;// Brightness value .
    boolean secondPoint=true;// Whether to display the second dot .( The actual is LED1 The decimal point of )
    uint8_t displayBuffer[6];// memory .
  protected:
    void init(void){uint8_t index;pinMode(DIO, OUTPUT);pinMode(CLK, OUTPUT);iic_stop();for(index=0;index<6;index++){displayBuffer[index]=0xff;}Brightness=7;writeBuffer();}
    void iic_start(void){digitalWrite(CLK,LOW);delayMicroseconds(TM1637_DELAY_US);digitalWrite(DIO,HIGH);delayMicroseconds(TM1637_DELAY_US);digitalWrite(CLK,HIGH);delayMicroseconds(TM1637_DELAY_US);digitalWrite(DIO, LOW);delayMicroseconds(TM1637_DELAY_US);}
    void iic_stop(void){ digitalWrite(CLK,LOW);delayMicroseconds(TM1637_DELAY_US);digitalWrite(DIO, LOW);delayMicroseconds(TM1637_DELAY_US);digitalWrite(CLK,HIGH);delayMicroseconds(TM1637_DELAY_US);digitalWrite(DIO,HIGH);delayMicroseconds(TM1637_DELAY_US);}
    void iic_waitACK(void){uint16_t Index;digitalWrite(CLK, LOW);delayMicroseconds(TM1637_DELAY_US);digitalWrite(DIO, HIGH);for(Index=0;Index<10;Index++){if(!digitalRead(DIO)){break;}delayMicroseconds(TM1637_DELAY_US);}digitalWrite(CLK,HIGH);delayMicroseconds(TM1637_DELAY_US);digitalWrite(CLK,LOW);delayMicroseconds(TM1637_DELAY_US);}
    void iic_writeByte(uint8_t InData){uint8_t Index;for(Index=0;Index<8;Index++){digitalWrite(CLK, LOW);delayMicroseconds(TM1637_DELAY_US);if(InData&0x01){digitalWrite(DIO, HIGH);}else{digitalWrite(DIO, LOW);}delayMicroseconds(TM1637_DELAY_US);digitalWrite(CLK, HIGH);delayMicroseconds(TM1637_DELAY_US);delayMicroseconds(TM1637_DELAY_US);InData=InData>>1;}digitalWrite(CLK, LOW);delayMicroseconds(TM1637_DELAY_US);}
    void writeBuffer(void){uint8_t Index;iic_start();iic_writeByte(0x40);iic_waitACK();iic_stop();iic_start();iic_writeByte(0xc0);iic_waitACK();for(Index=0;Index<6;Index++){if(secondPoint==true && Index==1){iic_writeByte(displayBuffer[Index]|0x80);}else{iic_writeByte(displayBuffer[Index]);}iic_waitACK();}iic_stop();iic_start();iic_writeByte(Brightness&0x07|0x88);iic_waitACK();iic_stop();}

  public:
    TM1637(void){;}
    TM1637(uint8_t In_DIO,uint8_t In_CLK){DIO=In_DIO;CLK=In_CLK;}
    void begin(void){init();}
    void begin(uint8_t In_DIO,uint8_t In_CLK){DIO=In_DIO;CLK=In_CLK;begin();}
    uint8_t read(uint8_t Address){if(Address>=6){return 0;}else{return displayBuffer[Address];}}
    uint8_t write(uint8_t Address,uint8_t Data){if(Address>=6||Data>=16){return 1;}displayBuffer[Address]=displayChar[Data];writeBuffer();return 0;}// Write video memory （00H~05H）. Successfully returns 0, Failure to return 1.
    uint8_t brightness(uint8_t In_Data){if(In_Data>7){Brightness=7;}else{Brightness=In_Data;}writeBuffer();return Brightness;}// Set brightness （0~7）.
    uint8_t brightness(void){return Brightness;}// Get brightness value .
    void point(void){secondPoint=!secondPoint;writeBuffer();}// Change the display state of the second dot .
    void point(boolean In_secondPoint){secondPoint=In_secondPoint;writeBuffer();}// Show ( Extinguish ) Second point .
    void point(int In_secondPoint){if(In_secondPoint==0){secondPoint=false;}else{secondPoint=true;}writeBuffer();}// Show ( Extinguish ) Second point .
};
#endif

Main program file :TM1637.INO( Demonstrate nixie tube display , Second dot flashing , Brightness adjustment )

#include "TM1637.C"
TM1637 LED_FOR;
void setup() {
  LED_FOR.begin(26,27);// initialization , Set up IIC Communication pin .
  LED_FOR.brightness(7);//LED Maximum brightness .
}

void loop() {
  uint8_t index;
  uint16_t TemNum;
  TemNum=millis();
  if(TemNum%1000<500){LED_FOR.point(true);}else{LED_FOR.point(false);}// Second dot flashing .
  for(index=0;index<4;index++){
    TemNum=TemNum/10;
    LED_FOR.write(index,TemNum%10);// Display four digits .
  }
}