> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/wokwi/wokwi-docs/llms.txt
> Use this file to discover all available pages before exploring further.

# TM1637 7-Segment Display

> Seven segment LED display module with TM1637 4-wire interface

Seven segment LED display module with TM1637 4-wire interface

## Pin names

<ParamField path="CLK" type="pin">
  Clock input
</ParamField>

<ParamField path="DIO" type="pin">
  Data input (also used for acknowledging data received)
</ParamField>

<ParamField path="VCC" type="pin">
  Supply voltage
</ParamField>

<ParamField path="GND" type="pin">
  Ground
</ParamField>

<Note>
  The DIO pin is also used for acknowledging the data received from the microcontroller, by pulling it down at a specific clock cycle.
</Note>

## Attributes

<ParamField path="color" type="string" default="red">
  The color of the segment LEDs
</ParamField>

## Using the 7-segment display

This variant of the seven segment display uses the TM1637 chip. You'll only need 2 microcontroller pins to communicate with it.

The TM1637 communication protocol is non-standard. It resembles the I2C protocol, but it is simpler and incompatible with I2C. Luckily, you can use a library and not worry about the implementation of the protocol. Here are some TM1637 libraries you can use on Arduino: RT1637\_RT([https://github.com/RobTillaart/TM1637\_RT](https://github.com/RobTillaart/TM1637_RT)), Grove 4-Digit Display.

## Simulator examples

* [TM1637 Counter](https://wokwi.com/projects/339227323398095442)
* [Three TM1637 displays](https://wokwi.com/projects/356661328560439297)
* [TM1637 Thermometer (MicroPython on Pi Pico)](https://wokwi.com/projects/339373435833549395)