HS-KEY12A-L 12-key matrix keyboard

1. Introduction

2. Schematic

Module Parameters

Pin Name	description
G	GND (Negative Power Input)
V	VCC (Positive Power Input)
S	Analog Signal Pin

Power Supply Voltage: 3.3V / 5V
Connection Method: PH2.0 Terminal Wire
Installation method: Fixed with four screws

4, Circuit Board Size

5 of Arduino IDE example program

Arduino UNO Graphical Example Program:

volatile boolean buttonState;
volatile int buttonvaule;
void light(boolean G, boolean Y, boolean R) {
 digitalWrite(9,G);
 digitalWrite(10,Y);
 digitalWrite(11,R);
}
void setup(){
 Serial.begin(9600);
 buttonState = 0;
 buttonvaule = 0;
 // 按键状态值
 pinMode(A0, INPUT);
 pinMode(9, OUTPUT);
 pinMode(10, OUTPUT);
 pinMode(11, OUTPUT);
}
void loop(){
 //1按键模拟值：36±1；
 //2按键模拟值：76±1；
 //3按键模拟值：108±1；
 //4按键模拟值：139±1；
 //5按键模拟值：169±1；
 //6按键模拟值：196±1；
 //7按键模拟值：216±1；
 //8按键模拟值：235±1；
 //9按键模拟值：252±1；
 //*按键模拟值：270±1；
 //0按键模拟值：285±1；
 //#按键模拟值：307±1；
 //按键没被按下模拟值：1023
 //矩阵键盘接A0，交通灯接D9，D10，D11
 //效果：按下数字0关灯，按下数字1亮绿灯；
 //按下数字2亮黄灯；按下数字3亮红灯；
 buttonvaule = analogRead(A0);
 if (buttonvaule == 1023) {
 buttonState = 0;
 }
 if ((buttonvaule >= 35 && buttonvaule <= 37) && buttonState == 0) {
 light(HIGH, LOW, LOW);
 buttonState = 1;
 } else if ((buttonvaule >= 75 && buttonvaule <= 77) && buttonState == 0) {
 light(LOW, HIGH, LOW);
 buttonState = 1;
 } else if ((buttonvaule >= 107 && buttonvaule <= 109) && buttonState == 0) {
 light(LOW, LOW, HIGH);
 buttonState = 1;
 } else if ((buttonvaule >= 284 && buttonvaule <= 286) && buttonState == 0) {
 light(LOW, LOW, LOW);
 buttonState = 1;
 }
 Serial.println(buttonvaule);
}

ESP32 Python Example (for Mixly IDE / Micskit)
(Choose the Python ESP32 [ESP32 Generic(4MB)] to switch to code mode upload):

import machine

pin25 = machine.Pin(25, machine.Pin.OUT) pin26 = machine.Pin(26, machine.Pin.OUT) pin27 = machine.Pin(27, machine.Pin.OUT) adc32 = machine.ADC(machine.Pin(32)) while True: if 3000 < adc32.read_u16() < 4000: pin25.value(1) pin26.value(0) pin27.value(0) print(adc32.read_u16()) elif 11000 < adc32.read_u16() < 13000: pin25.value(0) pin26.value(1) pin27.value(0) print(adc32.read_u16()) elif 18000 < adc32.read_u16() < 20000: pin25.value(0) pin26.value(0) pin27.value(1) print(adc32.read_u16())