====== lamaPLC: TM1637 7-segment display ======
{{ :sensor:tm1637_2.png?200|TM1637 7-segment display}}

The TM1637 module is a driver for 4-digit 7-segment displays. These chips are standard in inexpensive display units. They communicate with the processor using an **I²C-like protocol**. The implementation relies entirely on software emulation and uses no specialized hardware, aside from GPIO pins. It is assumed that pull-up resistors are present, typically integrated into the display module.


  * Operating voltage: 3.3 – 5 V DC
  * Maximum current draw: 80mA
  * Reverse polarity protection: Yes

==== Wiring Diagram =====

^TM1637 Pin^Arduino^Pin	Description|
^GND|GND|Ground|
^VCC|5V or 3.3V	Power|(3.3V–5.25V DC)|
^DIO|Digital Pin 3|Data Input/Output (configurable)|
^CLK|Digital Pin 2|Clock Input (configurable)|

{{page>:tarhal}}

==== Required Library ====
Install the **TM1637Display** library by Avishay Orpaz through the Arduino IDE Library Manager (Sketch > Include Library > Manage Libraries...)

==== Arduino code ====
This code initializes the display, sets the brightness, and loops through a simple counter.

<code c>
#include <TM1637Display.h>

// Define the connections
#define CLK 2
#define DIO 3

// Create a display object
TM1637Display display(CLK, DIO);

void setup() {
  display.setBrightness(0x0f); // Set brightness (0x00 to 0x0f)
  display.clear();             // Clear the display
}

void loop() {
  // Show a static number
  display.showNumberDec(1234);
  delay(2000);

  // Counter loop
  for (int i = 0; i <= 100; i++) {
    display.showNumberDec(i);
    delay(100);
  }
  
  display.clear();
  delay(1000);
}
</code>

===== Sources =====
[[https://docs.arduino.cc/libraries/tm1637/|Arduino Doc TM1637 library]] \\

===== Sensor topics on lamaPLC =====
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