ESP32 Arduino and TM1637 Seven Segment LED Display

Abhishek Ghosh

By Abhishek Ghosh March 9, 2019 6:05 pm Updated on March 9, 2019

ESP32 Arduino and TM1637 Seven Segment LED Display

ESP32 Arduino means Arduino IDE configured to use ESP32 like Arduino, the guide which we already have. TM1637 Seven Segment LED Display is Popular Thing in Arduino Prototyping World. Here is Some Words About Using TM1637 With ESP32 Arduino. Apart from IoT developments, it is important to port all the popular modules, kits to ESP32.

TM1637 is a driver IC which has pathetic documentation. It is not easy to write libaray to support dot (.) and colon (:). Using 7 segment display with TM1637 reduce the burden on the host controller because all of the multiplexing is handled on the interface chip. However, TM1637 seven segment LED display will suck huge battery. So actually it is unsuitable when battery needs to be saved.

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There is few existing efforts to develop ESP32 specific libraries for Arduino, like :

https://github.com/petrows/esp-32-tm1637

1	https://github.com/petrows/esp-32-tm1637

However, we tested the popular libaray for TM1637 :

https://github.com/bremme/arduino-tm1637

1	https://github.com/bremme/arduino-tm1637

Using the pin 22 and pin 23 of ESP32, it gave this result of example :

ESP32 Arduino and TM1637 Seven Segment LED Display

I have not changed the example sketch much :

#include "SevenSegmentTM1637.h"

/* initialize global TM1637 Display object
*  The constructor takes two arguments, the number of the clock pin and the digital output pin:
* SevenSegmentTM1637(byte pinCLK, byte pinDIO);
*/
const byte PIN_CLK = 22;   // define CLK pin (any digital pin)
const byte PIN_DIO = 23;   // define DIO pin (any digital pin)
SevenSegmentTM1637    display(PIN_CLK, PIN_DIO);

// run setup code
void setup() {
  Serial.begin(9600);         // initializes the Serial connection @ 9600 baud
  display.begin();            // initializes the display
  display.setBacklight(100);  // set the brightness to 100 %
  display.print("INIT");      // display INIT on the display
  delay(1000);                // wait 1000 ms
};

// run loop (forever)
void loop() {
  display.print("LOOP");                // display LOOP on the display
  delay(1000);                          // wait 1000 ms
  display.print("COUNTING SOME DIGITS");// print COUNTING SOME DIGITS
  display.clear();                      // clear the display
  for (uint8_t i=0; i < 100; i++) {     // loop from 0 to 100
    display.print(i);                   // display loop counter
    delay(100);                         // wait 100 ms
  };
  display.clear();                      // clear the display
  display.print("SUCC");                // print SUCC for success
  display.blink();                      // blink SUCC
  delay(1000);                          // wait 1000 ms
};

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#include "SevenSegmentTM1637.h"

/* initialize global TM1637 Display object

* The constructor takes two arguments, the number of the clock pin and the digital output pin:

* SevenSegmentTM1637(byte pinCLK, byte pinDIO);

*/

const byte PIN_CLK = 22; // define CLK pin (any digital pin)

const byte PIN_DIO = 23; // define DIO pin (any digital pin)

SevenSegmentTM1637 display(PIN_CLK, PIN_DIO);

// run setup code

void setup() {

Serial.begin(9600); // initializes the Serial connection @ 9600 baud

display.begin(); // initializes the display

display.setBacklight(100); // set the brightness to 100 %

display.print("INIT"); // display INIT on the display

delay(1000); // wait 1000 ms

};

// run loop (forever)

void loop() {

display.print("LOOP"); // display LOOP on the display

delay(1000); // wait 1000 ms

display.print("COUNTING SOME DIGITS");// print COUNTING SOME DIGITS

display.clear(); // clear the display

for (uint8_t i=0; i < 100; i++) { // loop from 0 to 100

display.print(i); // display loop counter

delay(100); // wait 100 ms

};

display.clear(); // clear the display

display.print("SUCC"); // print SUCC for success

display.blink(); // blink SUCC

delay(1000); // wait 1000 ms

};

There is definite need to thoroughly examine this library for minus (-) dot (.) and colon (:) support for ESP32. On initial run, it apears to me as working as intended.

Tagged With https://thecustomizewindows com/2019/03/esp32-arduino-and-tm1637-seven-segment-led-display/ , tm1637 display counter c example

ESP32 Arduino and TM1637 Seven Segment LED Display

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