4*4 Matrix Keyboard Module

wmnologoJanuary 1, 2023Less than 1 minute

Overview

The 4*4 capacitive matrix keyboard reads the analog quantity to determine the corresponding key value.

Product Parameters

Operating voltage: 3.3V~5V
Analog sensor
Using PH-2.03P socket
The sensor is compatible with Arduino, Micropython, etc.

Pin Description

Number	Name	Functional Description
1	VCC	3V3~5V positive power supply
2	GND	Negative power supply
3	S	Analog signal output

User Guide

Arduino

Download the Arduino library file
When using the sample code, the library file needs to be placed in the same folder. (As shown in the figure below)

Sample Code

/*!
 * WMNologo
 * Matrix Keyboard
 *
 */
#include "Matrix_buttons.h"
// Create an object
Matrix_buttons Matrix_buttons1;
// The main program starts
void setup() {
  Serial.begin(9600);
void loop() {
// The S signal line is connected to A0
  Serial.println(Matrix_buttons1.get_follow_sensor(A0));

Result

The corresponding value of the matrix keyboard is printed in the serial port

Download the Mind+ extension library (Please download the Mind+Uno extension library when downloading. Currently, only the Uno motherboard is supported. If you need expansion, you can contact the group owner in the QQ group for development)